Merge pull request #1 from TouchInstinct/bugfix/firstLoading

firstLoading fixed

.codecov.yml

@@ -0,0 +1,3 @@
+ignore:
+    - "./Chatto/Tests"
+    - "./ChattoAdditions/Tests"

.swift-version

@@ -0,0 +1 @@
+3.0.1

.swiftlint.yml

@@ -1,4 +1,9 @@
-disabled_rules: # rule identifiers to exclude from running
+opt_in_rules:
+  - closure_spacing
+  - overridden_super_call
+  - redundant_nil_coalesing
+  - explicit_init
+disabled_rules:
   - file_length
   - force_cast
   - function_body_length

.travis.yml

@@ -1,12 +1,10 @@
 language: objective-c
-osx_image: xcode7.3
+osx_image: xcode8.1
 
 script:
 - set -o pipefail
-- xcodebuild clean build test -workspace ./ChattoApp/ChattoApp.xcworkspace -scheme ChattoApp -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=9.3' -configuration Debug | xcpretty
-- rm -rf ~/Library/Developer/Xcode/DerivedData
-- xcodebuild clean build test -workspace ./Chatto.xcworkspace -scheme Chatto -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=9.3' -configuration Debug | xcpretty
-- (curl -s https://codecov.io/bash) | bash
-- rm -rf ~/Library/Developer/Xcode/DerivedData
-- xcodebuild clean build test -workspace ./Chatto.xcworkspace -scheme ChattoAdditions -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6,OS=9.3' -configuration Debug | xcpretty
-- (curl -s https://codecov.io/bash) | bash
+- xcodebuild clean build test -workspace ./Chatto.xcworkspace -scheme Chatto -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 7' -configuration Debug | xcpretty
+- bash <(curl -s https://codecov.io/bash) -J 'Chatto'
+- xcodebuild clean build test -workspace ./Chatto.xcworkspace -scheme ChattoAdditions -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 7' -configuration Debug | xcpretty
+- bash <(curl -s https://codecov.io/bash) -J 'ChattoAdditions'
+- xcodebuild clean build test -workspace ./ChattoApp/ChattoApp.xcworkspace -scheme ChattoApp -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 7' -configuration Debug | xcpretty

CHANGELOG.md

@@ -1,3 +1,12 @@
+### 3.0.1 (Nov 14, 2016)
+* Swift 3.0.1 / Xcode 8.1 support [#233](https://github.com/badoo/Chatto/pull/233) - [@diegosanchezr](https://github.com/diegosanchezr)
+* Fixes weird linker issue with Carthage [#232](https://github.com/badoo/Chatto/pull/232) - [@zwang](https://github.com/zwang)
+* Avoids using AVCapture in simulator [#235](https://github.com/badoo/Chatto/pull/235) - [@geegaset](https://github.com/geegaset)
+* Avoids crashing when receiving a nil indexPath (WebDriverAgent) [#248](https://github.com/badoo/Chatto/pull/248) - [@diegosanchezr](https://github.com/diegosanchezr)
+
+### 3.0 (Sept 21, 2016)
+* Swift 3 support 🎉 - [#220](https://github.com/badoo/Chatto/pull/220) - [@diegosanchezr](https://github.com/diegosanchezr)
+
 ### 2.1 (Sept 17, 2016)
 * Enhanced customization for LiveCameraCell [#199](https://github.com/badoo/Chatto/pull/199) - [@TerekhovAnton](https://github.com/TerekhovAnton)
 * Fixes input not being at the bottom when chat is embedded in a UITabbarController [#202](https://github.com/badoo/Chatto/pull/202) - [@andris-zalitis](https://github.com/andris-zalitis)

Chatto.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "Chatto"
-  s.version      = "2.1.0"
+  s.version      = "3.0.1"
   s.summary      = "Chat framework in Swift"
   s.description  = <<-DESC
                    Lightweight chat framework to build Chat apps

Chatto/Chatto.xcodeproj/project.pbxproj

@@ -426,7 +426,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -470,7 +470,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";

Chatto/Source/Chat Items/BaseChatItemPresenter.swift

@@ -25,62 +25,62 @@
 import UIKit
 
 public enum ChatItemVisibility {
-    case Hidden
-    case Appearing
-    case Visible
+    case hidden
+    case appearing
+    case visible
 }
 
-public class BaseChatItemPresenter<CellT: UICollectionViewCell>: ChatItemPresenterProtocol {
+open class BaseChatItemPresenter<CellT: UICollectionViewCell>: ChatItemPresenterProtocol {
     public final weak var cell: CellT?
 
-    public init() { }
+    public init() {}
 
-    public class func registerCells(collectionView: UICollectionView) {
+    open class func registerCells(_ collectionView: UICollectionView) {
         assert(false, "Implement in subclass")
     }
 
-    public var canCalculateHeightInBackground: Bool {
+    open var canCalculateHeightInBackground: Bool {
         return false
     }
 
-    public func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
+    open func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
         assert(false, "Implement in subclass")
         return 0
     }
 
-    public func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
+    open func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
         assert(false, "Implemenent in subclass")
         return UICollectionViewCell()
     }
 
-    public func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
+    open func configureCell(_ cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
         assert(false, "Implemenent in subclass")
     }
 
-    final public private(set) var itemVisibility: ChatItemVisibility = .Hidden
+    final public private(set) var itemVisibility: ChatItemVisibility = .hidden
 
     // Need to override default implementatios. Otherwise subclasses's code won't be executed
     // http://stackoverflow.com/questions/31795158/swift-2-protocol-extension-not-calling-overriden-method-correctly
-    public final func cellWillBeShown(cell: UICollectionViewCell) {
+    public final func cellWillBeShown(_ cell: UICollectionViewCell) {
         if let cell = cell as? CellT {
             self.cell = cell
-            self.itemVisibility = .Appearing
+            self.itemVisibility = .appearing
             self.cellWillBeShown()
-            self.itemVisibility = .Visible
+            self.itemVisibility = .visible
         } else {
             assert(false, "Invalid cell was given to presenter!")
         }
     }
 
-    public func cellWillBeShown() {
+    open func cellWillBeShown() {
         // Hook for subclasses
     }
 
-    public func shouldShowMenu() -> Bool {
+    open func shouldShowMenu() -> Bool {
         return false
     }
 
-    public final func cellWasHidden(cell: UICollectionViewCell) {
+    public final func cellWasHidden(_ cell: UICollectionViewCell) {
         // Carefull!! This doesn't mean that this is no longer visible
         // If cell is replaced (due to a reload for instance) we can have the following sequence:
         //   - New cell is taken from the pool and configured. We'll get cellWillBeShown
@@ -89,7 +89,7 @@ public class BaseChatItemPresenter<CellT: UICollectionViewCell>: ChatItemPresent
         if let cell = cell as? CellT {
             if cell === self.cell {
                 self.cell = nil
-                self.itemVisibility = .Hidden
+                self.itemVisibility = .hidden
                 self.cellWasHidden()
             }
         } else {
@@ -97,15 +97,15 @@ public class BaseChatItemPresenter<CellT: UICollectionViewCell>: ChatItemPresent
         }
     }
 
-    public func cellWasHidden() {
+    open func cellWasHidden() {
         // Hook for subclasses. Here we are not visible for real.
     }
 
-    public func canPerformMenuControllerAction(action: Selector) -> Bool {
+    open func canPerformMenuControllerAction(_ action: Selector) -> Bool {
         return false
     }
 
-    public func performMenuControllerAction(action: Selector) {
+    open func performMenuControllerAction(_ action: Selector) {
         assert(self.canPerformMenuControllerAction(action))
     }
 }

Chatto/Source/Chat Items/ChatItemCompanion.swift

@@ -25,7 +25,7 @@ THE SOFTWARE.
 import Foundation
 
 public protocol ChatItemsDecoratorProtocol {
-    func decorateItems(chatItems: [ChatItemProtocol]) -> [DecoratedChatItem]
+    func decorateItems(_ chatItems: [ChatItemProtocol]) -> [DecoratedChatItem]
 }
 
 public struct DecoratedChatItem: UniqueIdentificable {

Chatto/Source/Chat Items/ChatItemProtocolDefinitions.swift

@@ -35,29 +35,29 @@ public protocol ChatItemDecorationAttributesProtocol {
 }
 
 public protocol ChatItemPresenterProtocol: class {
-    static func registerCells(collectionView: UICollectionView)
+    static func registerCells(_ collectionView: UICollectionView)
     var canCalculateHeightInBackground: Bool { get } // Default is false
     func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat
-    func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell
-    func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?)
-    func cellWillBeShown(cell: UICollectionViewCell) // optional
-    func cellWasHidden(cell: UICollectionViewCell) // optional
+    func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell
+    func configureCell(_ cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?)
+    func cellWillBeShown(_ cell: UICollectionViewCell) // optional
+    func cellWasHidden(_ cell: UICollectionViewCell) // optional
     func shouldShowMenu() -> Bool // optional. Default is false
-    func canPerformMenuControllerAction(action: Selector) -> Bool // optional. Default is false
-    func performMenuControllerAction(action: Selector) // optional
+    func canPerformMenuControllerAction(_ action: Selector) -> Bool // optional. Default is false
+    func performMenuControllerAction(_ action: Selector) // optional
 }
 
 public extension ChatItemPresenterProtocol { // Optionals
     var canCalculateHeightInBackground: Bool { return false }
-    func cellWillBeShown(cell: UICollectionViewCell) {}
-    func cellWasHidden(cell: UICollectionViewCell) {}
+    func cellWillBeShown(_ cell: UICollectionViewCell) {}
+    func cellWasHidden(_ cell: UICollectionViewCell) {}
     func shouldShowMenu() -> Bool { return false }
-    func canPerformMenuControllerAction(action: Selector) -> Bool { return false }
-    func performMenuControllerAction(action: Selector) {}
+    func canPerformMenuControllerAction(_ action: Selector) -> Bool { return false }
+    func performMenuControllerAction(_ action: Selector) {}
 }
 
 public protocol ChatItemPresenterBuilderProtocol {
-    func canHandleChatItem(chatItem: ChatItemProtocol) -> Bool
-    func createPresenterWithChatItem(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol
+    func canHandleChatItem(_ chatItem: ChatItemProtocol) -> Bool
+    func createPresenterWithChatItem(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol
     var presenterType: ChatItemPresenterProtocol.Type { get }
 }

Chatto/Source/Chat Items/DummyChatItemPresenter.swift

@@ -27,8 +27,8 @@ import Foundation
 // Handles messages that aren't supported so they appear as invisible
 class DummyChatItemPresenter: ChatItemPresenterProtocol {
 
-    class func registerCells(collectionView: UICollectionView) {
-        collectionView.registerClass(DummyCollectionViewCell.self, forCellWithReuseIdentifier: "cell-id-unhandled-message")
+    class func registerCells(_ collectionView: UICollectionView) {
+        collectionView.register(DummyCollectionViewCell.self, forCellWithReuseIdentifier: "cell-id-unhandled-message")
     }
 
     var canCalculateHeightInBackground: Bool {
@@ -39,14 +39,13 @@ class DummyChatItemPresenter: ChatItemPresenterProtocol {
         return 0
     }
 
-    func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
-        return collectionView.dequeueReusableCellWithReuseIdentifier("cell-id-unhandled-message", forIndexPath: indexPath)
+    func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
+        return collectionView.dequeueReusableCell(withReuseIdentifier: "cell-id-unhandled-message", for: indexPath)
     }
 
-    func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
-        cell.hidden = true
+    func configureCell(_ cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
+        cell.isHidden = true
     }
 }
 
-
 class DummyCollectionViewCell: UICollectionViewCell {}

Chatto/Source/ChatController/BaseChatViewController+Changes.swift

@@ -26,15 +26,15 @@ import Foundation
 
 extension BaseChatViewController: ChatDataSourceDelegateProtocol {
 
-    public func chatDataSourceDidUpdate(chatDataSource: ChatDataSourceProtocol, updateType: UpdateType) {
+    public func chatDataSourceDidUpdate(_ chatDataSource: ChatDataSourceProtocol, updateType: UpdateType) {
         self.enqueueModelUpdate(updateType: updateType)
     }
 
-    public func chatDataSourceDidUpdate(chatDataSource: ChatDataSourceProtocol) {
-        self.enqueueModelUpdate(updateType: .Normal)
+    public func chatDataSourceDidUpdate(_ chatDataSource: ChatDataSourceProtocol) {
+        self.enqueueModelUpdate(updateType: .normal)
     }
 
-    public func enqueueModelUpdate(updateType updateType: UpdateType) {
+    public func enqueueModelUpdate(updateType: UpdateType) {
         let newItems = self.chatDataSource?.chatItems ?? []
 
         if self.updatesConfig.coalesceUpdates {
@@ -56,7 +56,7 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
     }
 
     public func enqueueMessageCountReductionIfNeeded() {
-        guard let preferredMaxMessageCount = self.constants.preferredMaxMessageCount where (self.chatDataSource?.chatItems.count ?? 0) > preferredMaxMessageCount else { return }
+        guard let preferredMaxMessageCount = self.constants.preferredMaxMessageCount, (self.chatDataSource?.chatItems.count ?? 0) > preferredMaxMessageCount else { return }
         self.updateQueue.addTask { [weak self] (completion) -> () in
             guard let sSelf = self else { return }
             sSelf.chatDataSource?.adjustNumberOfMessages(preferredMaxCount: sSelf.constants.preferredMaxMessageCountAdjustment, focusPosition: sSelf.focusPosition, completion: { (didAdjust) -> Void in
@@ -66,7 +66,7 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
                 }
                 let newItems = sSelf.chatDataSource?.chatItems ?? []
                 let oldItems = sSelf.chatItemCompanionCollection
-                sSelf.updateModels(newItems: newItems, oldItems: oldItems, updateType: .MessageCountReduction, completion: completion )
+                sSelf.updateModels(newItems: newItems, oldItems: oldItems, updateType: .messageCountReduction, completion: completion )
             })
         }
     }
@@ -89,7 +89,7 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         return min(max(0, Double(midContentOffset / contentHeight)), 1.0)
     }
 
-    func updateVisibleCells(changes: CollectionChanges) {
+    func updateVisibleCells(_ changes: CollectionChanges) {
         // Datasource should be already updated!
 
         assert(self.visibleCellsAreValid(changes: changes), "Invalid visible cells. Don't call me")
@@ -104,17 +104,17 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         }
     }
 
-    private func visibleCellsFromCollectionViewApi() -> [NSIndexPath: UICollectionViewCell] {
-        var visibleCells: [NSIndexPath: UICollectionViewCell] = [:]
-        self.collectionView.indexPathsForVisibleItems().forEach({ (indexPath) in
-            if let cell = self.collectionView.cellForItemAtIndexPath(indexPath) {
+    private func visibleCellsFromCollectionViewApi() -> [IndexPath: UICollectionViewCell] {
+        var visibleCells: [IndexPath: UICollectionViewCell] = [:]
+        self.collectionView.indexPathsForVisibleItems.forEach({ (indexPath) in
+            if let cell = self.collectionView.cellForItem(at: indexPath) {
                 visibleCells[indexPath] = cell
             }
         })
         return visibleCells
     }
 
-    private func visibleCellsAreValid(changes changes: CollectionChanges) -> Bool {
+    private func visibleCellsAreValid(changes: CollectionChanges) -> Bool {
         // Afer performBatchUpdates, indexPathForCell may return a cell refering to the state before the update
         // if self.updatesConfig.fastUpdates is enabled, very fast updates could result in `updateVisibleCells` updating wrong cells.
         // See more: https://github.com/diegosanchezr/UICollectionViewStressing
@@ -128,18 +128,19 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
 
     private enum ScrollAction {
         case scrollToBottom
-        case preservePosition(rectForReferenceIndexPathBeforeUpdate: CGRect?, referenceIndexPathAfterUpdate: NSIndexPath?)
+        case preservePosition(rectForReferenceIndexPathBeforeUpdate: CGRect?, referenceIndexPathAfterUpdate: IndexPath?)
     }
 
-    func performBatchUpdates(updateModelClosure updateModelClosure: () -> Void,
+    func performBatchUpdates(updateModelClosure: @escaping () -> Void,
                                                 changes: CollectionChanges,
                                                 updateType: UpdateType,
-                                                completion: () -> Void) {
+                                                completion: @escaping () -> Void) {
 
         let usesBatchUpdates: Bool
+        let animateBatchUpdates: Bool
         do { // Recover from too fast updates...
             let visibleCellsAreValid = self.visibleCellsAreValid(changes: changes)
-            let wantsReloadData = updateType != .Normal
+            let wantsReloadData = ![UpdateType.normal, UpdateType.pagination, UpdateType.firstLoad].contains(updateType)
             let hasUnfinishedBatchUpdates = self.unfinishedBatchUpdatesCount > 0 // This can only happen when enabling self.updatesConfig.fastUpdates
 
             // a) It's unsafe to perform reloadData while there's a performBatchUpdates animating: https://github.com/diegosanchezr/UICollectionViewStressing/tree/master/GhostCells
@@ -158,11 +159,12 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
             // ... if they are still invalid the only thing we can do is a reloadData
             let mustDoReloadData = !visibleCellsAreValid // Only way to recover from this inconsistent state
             usesBatchUpdates = !wantsReloadData && !mustDoReloadData
+            animateBatchUpdates = ![UpdateType.pagination, UpdateType.firstLoad].contains(updateType)
         }
 
         let scrollAction: ScrollAction
         do { // Scroll action
-            if updateType != .Pagination && self.isScrolledAtBottom() {
+            if updateType != .pagination && self.isScrolledAtBottom() {
                 scrollAction = .scrollToBottom
             } else {
                 let (oldReferenceIndexPath, newReferenceIndexPath) = self.referenceIndexPathsToRestoreScrollPositionOnUpdate(itemsBeforeUpdate: self.chatItemCompanionCollection, changes: changes)
@@ -178,7 +180,7 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
                 if myCompletionExecuted { return }
                 myCompletionExecuted = true
 
-                dispatch_async(dispatch_get_main_queue(), { () -> Void in
+                DispatchQueue.main.async(execute: { () -> Void in
                     // Reduces inconsistencies before next update: https://github.com/diegosanchezr/UICollectionViewStressing
                     completion()
                 })
@@ -186,36 +188,46 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         }
 
         if usesBatchUpdates {
-            UIView.animateWithDuration(self.constants.updatesAnimationDuration, animations: { () -> Void in
+            let batchUpdates = {
                 self.unfinishedBatchUpdatesCount += 1
                 self.collectionView.performBatchUpdates({ () -> Void in
                     updateModelClosure()
                     self.updateVisibleCells(changes) // For instace, to support removal of tails
 
-                    self.collectionView.deleteItemsAtIndexPaths(Array(changes.deletedIndexPaths))
-                    self.collectionView.insertItemsAtIndexPaths(Array(changes.insertedIndexPaths))
+                    self.collectionView.deleteItems(at: Array(changes.deletedIndexPaths))
+                    self.collectionView.insertItems(at: Array(changes.insertedIndexPaths))
                     for move in changes.movedIndexPaths {
-                        self.collectionView.moveItemAtIndexPath(move.indexPathOld, toIndexPath: move.indexPathNew)
+                        self.collectionView.moveItem(at: move.indexPathOld, to: move.indexPathNew)
                     }
                 }) { [weak self] (finished) -> Void in
                     defer { myCompletion() }
                     guard let sSelf = self else { return }
                     sSelf.unfinishedBatchUpdatesCount -= 1
                     if sSelf.unfinishedBatchUpdatesCount == 0, let onAllBatchUpdatesFinished = self?.onAllBatchUpdatesFinished {
-                        dispatch_async(dispatch_get_main_queue(), onAllBatchUpdatesFinished)
+                        DispatchQueue.main.async(execute: onAllBatchUpdatesFinished)
                     }
                 }
-            })
+            }
+
+            if animateBatchUpdates {
+                UIView.animate(withDuration: self.constants.updatesAnimationDuration, animations: { () -> Void in
+                    batchUpdates()
+                })
+            } else {
+                UIView.performWithoutAnimation {
+                    batchUpdates()
+                }
+            }
         } else {
             self.visibleCells = [:]
             updateModelClosure()
             self.collectionView.reloadData()
-            self.collectionView.collectionViewLayout.prepareLayout()
+            self.collectionView.collectionViewLayout.prepare()
         }
 
         switch scrollAction {
         case .scrollToBottom:
-            self.scrollToBottom(animated: updateType == .Normal)
+            self.scrollToBottom(animated: updateType == .normal)
         case .preservePosition(rectForReferenceIndexPathBeforeUpdate: let oldRect, referenceIndexPathAfterUpdate: let indexPath):
             let newRect = self.rectAtIndexPath(indexPath)
             self.scrollToPreservePosition(oldRefRect: oldRect, newRefRect: newRect)
@@ -226,16 +238,16 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         }
     }
 
-    private func updateModels(newItems newItems: [ChatItemProtocol], oldItems: ChatItemCompanionCollection, updateType: UpdateType, completion: () -> Void) {
+    private func updateModels(newItems: [ChatItemProtocol], oldItems: ChatItemCompanionCollection, updateType: UpdateType, completion: @escaping () -> Void) {
         let collectionViewWidth = self.collectionView.bounds.width
-        let updateType = self.isFirstLayout ? .FirstLoad : updateType
-        let performInBackground = updateType != .FirstLoad
+        let updateType = self.isFirstLayout ? .firstLoad : updateType
+        let performInBackground = updateType != .firstLoad
 
         self.autoLoadingEnabled = false
-        let perfomBatchUpdates: (changes: CollectionChanges, updateModelClosure: () -> Void) -> ()  = { [weak self] modelUpdate in
+        let perfomBatchUpdates: (_ changes: CollectionChanges, _ updateModelClosure: @escaping () -> Void) -> ()  = { [weak self] (changes, updateModelClosure) in
             self?.performBatchUpdates(
-                updateModelClosure: modelUpdate.updateModelClosure,
-                changes: modelUpdate.changes,
+                updateModelClosure: updateModelClosure,
+                changes: changes,
                 updateType: updateType,
                 completion: { () -> Void in
                     self?.autoLoadingEnabled = true
@@ -251,19 +263,19 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         }
 
         if performInBackground {
-            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) { () -> Void in
+            DispatchQueue.global(qos: .userInitiated).async { () -> Void in
                 let modelUpdate = createModelUpdate()
-                dispatch_async(dispatch_get_main_queue(), { () -> Void in
-                    perfomBatchUpdates(changes: modelUpdate.changes, updateModelClosure: modelUpdate.updateModelClosure)
+                DispatchQueue.main.async(execute: { () -> Void in
+                    perfomBatchUpdates(modelUpdate.changes, modelUpdate.updateModelClosure)
                 })
             }
         } else {
             let modelUpdate = createModelUpdate()
-            perfomBatchUpdates(changes: modelUpdate.changes, updateModelClosure: modelUpdate.updateModelClosure)
+            perfomBatchUpdates(modelUpdate.changes, modelUpdate.updateModelClosure)
         }
     }
 
-    private func createModelUpdates(newItems newItems: [ChatItemProtocol], oldItems: ChatItemCompanionCollection, collectionViewWidth: CGFloat) -> (changes: CollectionChanges, updateModelClosure: () -> Void) {
+    private func createModelUpdates(newItems: [ChatItemProtocol], oldItems: ChatItemCompanionCollection, collectionViewWidth: CGFloat) -> (changes: CollectionChanges, updateModelClosure: () -> Void) {
         let newDecoratedItems = self.chatItemsDecorator?.decorateItems(newItems) ?? newItems.map { DecoratedChatItem(chatItem: $0, decorationAttributes: nil) }
         let changes = Chatto.generateChanges(oldCollection: oldItems.lazy.map { $0 }, newCollection: newDecoratedItems.lazy.map { $0 })
         let itemCompanionCollection = self.createCompanionCollection(fromChatItems: newDecoratedItems, previousCompanionCollection: oldItems)
@@ -284,7 +296,7 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
             // Oherwise updateVisibleCells may try to update existing cell with a new presenter which is working with a different type of cell
 
             // Optimization: reuse presenter if it's the same instance.
-            if let oldChatItemCompanion = oldItems[decoratedChatItem.uid] where oldChatItemCompanion.chatItem === chatItem {
+            if let oldChatItemCompanion = oldItems[decoratedChatItem.uid], oldChatItemCompanion.chatItem === chatItem {
                 presenter = oldChatItemCompanion.presenter
             } else {
                 presenter = self.createPresenterForChatItem(decoratedChatItem.chatItem)
@@ -293,22 +305,22 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         })
     }
 
-    private func createLayoutModel(items: ChatItemCompanionCollection, collectionViewWidth: CGFloat) -> ChatCollectionViewLayoutModel {
+    private func createLayoutModel(_ items: ChatItemCompanionCollection, collectionViewWidth: CGFloat) -> ChatCollectionViewLayoutModel {
         typealias IntermediateItemLayoutData = (height: CGFloat?, bottomMargin: CGFloat)
         typealias ItemLayoutData = (height: CGFloat, bottomMargin: CGFloat)
 
-        func createLayoutModel(intermediateLayoutData intermediateLayoutData: [IntermediateItemLayoutData]) -> ChatCollectionViewLayoutModel {
+        func createLayoutModel(intermediateLayoutData: [IntermediateItemLayoutData]) -> ChatCollectionViewLayoutModel {
             let layoutData = intermediateLayoutData.map { (intermediateLayoutData: IntermediateItemLayoutData) -> ItemLayoutData in
                 return (height: intermediateLayoutData.height!, bottomMargin: intermediateLayoutData.bottomMargin)
             }
             return ChatCollectionViewLayoutModel.createModel(self.collectionView.bounds.width, itemsLayoutData: layoutData)
         }
 
-        let isInbackground = !NSThread.isMainThread()
+        let isInbackground = !Thread.isMainThread
         var intermediateLayoutData = [IntermediateItemLayoutData]()
         var itemsForMainThread = [(index: Int, itemCompanion: ChatItemCompanion)]()
 
-        for (index, itemCompanion) in items.enumerate() {
+        for (index, itemCompanion) in items.enumerated() {
             var height: CGFloat?
             let bottomMargin: CGFloat = itemCompanion.decorationAttributes?.bottomMargin ?? 0
             if !isInbackground || itemCompanion.presenter.canCalculateHeightInBackground {
@@ -320,7 +332,7 @@ extension BaseChatViewController: ChatDataSourceDelegateProtocol {
         }
 
         if itemsForMainThread.count > 0 {
-            dispatch_sync(dispatch_get_main_queue(), { () -> Void in
+            DispatchQueue.main.sync(execute: { () -> Void in
                 for (index, itemCompanion) in itemsForMainThread {
                     let height = itemCompanion.presenter.heightForCell(maximumWidth: collectionViewWidth, decorationAttributes: itemCompanion.decorationAttributes)
                     intermediateLayoutData[index].height = height

Chatto/Source/ChatController/BaseChatViewController+Presenters.swift

@@ -26,11 +26,12 @@ import Foundation
 
 extension BaseChatViewController: ChatCollectionViewLayoutDelegate {
 
-    public func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+    public func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
         return self.chatItemCompanionCollection.count
     }
 
-    public func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
+    @objc(collectionView:cellForItemAtIndexPath:)
+    public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
         let presenter = self.presenterForIndexPath(indexPath)
         let cell = presenter.dequeueCell(collectionView: collectionView, indexPath: indexPath)
         let decorationAttributes = self.decorationAttributesForIndexPath(indexPath)
@@ -38,16 +39,17 @@ extension BaseChatViewController: ChatCollectionViewLayoutDelegate {
         return cell
     }
 
-    public func collectionView(collectionView: UICollectionView, didEndDisplayingCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
+    @objc(collectionView:didEndDisplayingCell:forItemAtIndexPath:)
+    open func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
         // Carefull: this index path can refer to old data source after an update. Don't use it to grab items from the model
         // Instead let's use a mapping presenter <--> cell
-        if let oldPresenterForCell = self.presentersByCell.objectForKey(cell) as? ChatItemPresenterProtocol {
-            self.presentersByCell.removeObjectForKey(cell)
+        if let oldPresenterForCell = self.presentersByCell.object(forKey: cell) as? ChatItemPresenterProtocol {
+            self.presentersByCell.removeObject(forKey: cell)
             oldPresenterForCell.cellWasHidden(cell)
         }
 
         if self.updatesConfig.fastUpdates {
-            if let visibleCell = self.visibleCells[indexPath] where visibleCell === cell {
+            if let visibleCell = self.visibleCells[indexPath], visibleCell === cell {
                 self.visibleCells[indexPath] = nil
             } else {
                 self.visibleCells.forEach({ (indexPath, storedCell) in
@@ -60,7 +62,8 @@ extension BaseChatViewController: ChatCollectionViewLayoutDelegate {
         }
     }
 
-    public func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
+    @objc(collectionView:willDisplayCell:forItemAtIndexPath:)
+    open func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
         // Here indexPath should always referer to updated data source.
 
         let presenter = self.presenterForIndexPath(indexPath)
@@ -80,23 +83,29 @@ extension BaseChatViewController: ChatCollectionViewLayoutDelegate {
         }
     }
 
-    public func collectionView(collectionView: UICollectionView, shouldShowMenuForItemAtIndexPath indexPath: NSIndexPath) -> Bool {
-        return self.presenterForIndexPath(indexPath).shouldShowMenu() ?? false
+    @objc(collectionView:shouldShowMenuForItemAtIndexPath:)
+    open func collectionView(_ collectionView: UICollectionView, shouldShowMenuForItemAt indexPath: IndexPath) -> Bool {
+        return self.presenterForIndexPath(indexPath).shouldShowMenu()
     }
 
-    public func collectionView(collectionView: UICollectionView, canPerformAction action: Selector, forItemAtIndexPath indexPath: NSIndexPath, withSender sender: AnyObject?) -> Bool {
-        return self.presenterForIndexPath(indexPath).canPerformMenuControllerAction(action) ?? false
+    @objc(collectionView:canPerformAction:forItemAtIndexPath:withSender:)
+    open func collectionView(_ collectionView: UICollectionView, canPerformAction action: Selector, forItemAt indexPath: IndexPath?, withSender sender: Any?) -> Bool {
+        // Note: IndexPath set optional due to https://github.com/badoo/Chatto/issues/247. SR-2417 might be related
+        // Might be related: https://bugs.swift.org/browse/SR-2417
+        guard let indexPath = indexPath else { return false }
+        return self.presenterForIndexPath(indexPath).canPerformMenuControllerAction(action)
     }
 
-    public func collectionView(collectionView: UICollectionView, performAction action: Selector, forItemAtIndexPath indexPath: NSIndexPath, withSender sender: AnyObject?) {
+    @objc(collectionView:performAction:forItemAtIndexPath:withSender:)
+    open func collectionView(_ collectionView: UICollectionView, performAction action: Selector, forItemAt indexPath: IndexPath, withSender sender: Any?) {
         self.presenterForIndexPath(indexPath).performMenuControllerAction(action)
     }
 
-    func presenterForIndexPath(indexPath: NSIndexPath) -> ChatItemPresenterProtocol {
+    func presenterForIndexPath(_ indexPath: IndexPath) -> ChatItemPresenterProtocol {
         return self.presenterForIndex(indexPath.item, chatItemCompanionCollection: self.chatItemCompanionCollection)
     }
 
-    func presenterForIndex(index: Int, chatItemCompanionCollection items: ChatItemCompanionCollection) -> ChatItemPresenterProtocol {
+    func presenterForIndex(_ index: Int, chatItemCompanionCollection items: ChatItemCompanionCollection) -> ChatItemPresenterProtocol {
         guard index < items.count else {
             // This can happen from didEndDisplayingCell if we reloaded with less messages
             return DummyChatItemPresenter()
@@ -104,11 +113,11 @@ extension BaseChatViewController: ChatCollectionViewLayoutDelegate {
         return items[index].presenter
     }
 
-    public func createPresenterForChatItem(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
+    public func createPresenterForChatItem(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
         return self.presenterFactory.createChatItemPresenter(chatItem)
     }
 
-    public func decorationAttributesForIndexPath(indexPath: NSIndexPath) -> ChatItemDecorationAttributesProtocol? {
+    public func decorationAttributesForIndexPath(_ indexPath: IndexPath) -> ChatItemDecorationAttributesProtocol? {
         return self.chatItemCompanionCollection[indexPath.item].decorationAttributes
     }
 }

Chatto/Source/ChatController/BaseChatViewController+Scrolling.swift

@@ -25,8 +25,8 @@
 import Foundation
 
 public enum CellVerticalEdge {
-    case Top
-    case Bottom
+    case top
+    case bottom
 }
 
 extension CGFloat {
@@ -36,17 +36,17 @@ extension CGFloat {
 extension BaseChatViewController {
 
     public func isScrolledAtBottom() -> Bool {
-        guard self.collectionView.numberOfSections() > 0 && self.collectionView.numberOfItemsInSection(0) > 0 else { return true }
-        let sectionIndex = self.collectionView.numberOfSections() - 1
-        let itemIndex = self.collectionView.numberOfItemsInSection(sectionIndex) - 1
-        let lastIndexPath = NSIndexPath(forItem: itemIndex, inSection: sectionIndex)
-        return self.isIndexPathVisible(lastIndexPath, atEdge: .Bottom)
+        guard self.collectionView.numberOfSections > 0 && self.collectionView.numberOfItems(inSection: 0) > 0 else { return true }
+        let sectionIndex = self.collectionView.numberOfSections - 1
+        let itemIndex = self.collectionView.numberOfItems(inSection: sectionIndex) - 1
+        let lastIndexPath = IndexPath(item: itemIndex, section: sectionIndex)
+        return self.isIndexPathVisible(lastIndexPath, atEdge: .bottom)
     }
 
     public func isScrolledAtTop() -> Bool {
-        guard self.collectionView.numberOfSections() > 0 && self.collectionView.numberOfItemsInSection(0) > 0 else { return true }
-        let firstIndexPath = NSIndexPath(forItem: 0, inSection: 0)
-        return self.isIndexPathVisible(firstIndexPath, atEdge: .Top)
+        guard self.collectionView.numberOfSections > 0 && self.collectionView.numberOfItems(inSection: 0) > 0 else { return true }
+        let firstIndexPath = IndexPath(item: 0, section: 0)
+        return self.isIndexPathVisible(firstIndexPath, atEdge: .top)
     }
 
     public func isCloseToBottom() -> Bool {
@@ -59,14 +59,14 @@ extension BaseChatViewController {
         return (self.visibleRect().minY / self.collectionView.contentSize.height) < self.constants.autoloadingFractionalThreshold
     }
 
-    public func isIndexPathVisible(indexPath: NSIndexPath, atEdge edge: CellVerticalEdge) -> Bool {
-        if let attributes = self.collectionView.collectionViewLayout.layoutAttributesForItemAtIndexPath(indexPath) {
+    public func isIndexPathVisible(_ indexPath: IndexPath, atEdge edge: CellVerticalEdge) -> Bool {
+        if let attributes = self.collectionView.collectionViewLayout.layoutAttributesForItem(at: indexPath) {
             let visibleRect = self.visibleRect()
-            let intersection = visibleRect.intersect(attributes.frame)
-            if edge == .Top {
-                return CGFloat.abs(intersection.minY - attributes.frame.minY) < CGFloat.bma_epsilon
+            let intersection = visibleRect.intersection(attributes.frame)
+            if edge == .top {
+                return abs(intersection.minY - attributes.frame.minY) < CGFloat.bma_epsilon
             } else {
-                return CGFloat.abs(intersection.maxY - attributes.frame.maxY) < CGFloat.bma_epsilon
+                return abs(intersection.maxY - attributes.frame.maxY) < CGFloat.bma_epsilon
             }
         }
         return false
@@ -75,22 +75,22 @@ extension BaseChatViewController {
     public func visibleRect() -> CGRect {
         let contentInset = self.collectionView.contentInset
         let collectionViewBounds = self.collectionView.bounds
-        let contentSize = self.collectionView.collectionViewLayout.collectionViewContentSize()
+        let contentSize = self.collectionView.collectionViewLayout.collectionViewContentSize
         return CGRect(x: CGFloat(0), y: self.collectionView.contentOffset.y + contentInset.top, width: collectionViewBounds.width, height: min(contentSize.height, collectionViewBounds.height - contentInset.top - contentInset.bottom))
     }
 
-    public func scrollToBottom(animated animated: Bool) {
+    public func scrollToBottom(animated: Bool) {
         // Cancel current scrolling
         self.collectionView.setContentOffset(self.collectionView.contentOffset, animated: false)
 
         // Note that we don't rely on collectionView's contentSize. This is because it won't be valid after performBatchUpdates or reloadData
         // After reload data, collectionViewLayout.collectionViewContentSize won't be even valid, so you may want to refresh the layout manually
-        let offsetY = max(-self.collectionView.contentInset.top, self.collectionView.collectionViewLayout.collectionViewContentSize().height - self.collectionView.bounds.height + self.collectionView.contentInset.bottom)
+        let offsetY = max(-self.collectionView.contentInset.top, self.collectionView.collectionViewLayout.collectionViewContentSize.height - self.collectionView.bounds.height + self.collectionView.contentInset.bottom)
 
         // Don't use setContentOffset(:animated). If animated, contentOffset property will be updated along with the animation for each frame update
         // If a message is inserted while scrolling is happening (as in very fast typing), we want to take the "final" content offset (not the "real time" one) to check if we should scroll to bottom again
         if animated {
-            UIView.animateWithDuration(self.constants.updatesAnimationDuration, animations: { () -> Void in
+            UIView.animate(withDuration: self.constants.updatesAnimationDuration, animations: { () -> Void in
                 self.collectionView.contentOffset = CGPoint(x: 0, y: offsetY)
             })
         } else {
@@ -98,21 +98,21 @@ extension BaseChatViewController {
         }
     }
 
-    public func scrollToPreservePosition(oldRefRect oldRefRect: CGRect?, newRefRect: CGRect?) {
-        guard let oldRefRect = oldRefRect, newRefRect = newRefRect else {
+    public func scrollToPreservePosition(oldRefRect: CGRect?, newRefRect: CGRect?) {
+        guard let oldRefRect = oldRefRect, let newRefRect = newRefRect else {
             return
         }
         let diffY = newRefRect.minY - oldRefRect.minY
         self.collectionView.contentOffset = CGPoint(x: 0, y: self.collectionView.contentOffset.y + diffY)
     }
 
-    public func scrollViewDidScroll(scrollView: UIScrollView) {
-        if self.collectionView.dragging {
+    public func scrollViewDidScroll(_ scrollView: UIScrollView) {
+        if self.collectionView.isDragging {
             self.autoLoadMoreContentIfNeeded()
         }
     }
 
-    public func scrollViewDidScrollToTop(scrollView: UIScrollView) {
+    public func scrollViewDidScrollToTop(_ scrollView: UIScrollView) {
         self.autoLoadMoreContentIfNeeded()
     }
 

Chatto/Source/ChatController/BaseChatViewController.swift

@@ -24,14 +24,14 @@
 
 import UIKit
 
-public class BaseChatViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
+open class BaseChatViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
 
     public typealias ChatItemCompanionCollection = ReadOnlyOrderedDictionary<ChatItemCompanion>
 
     public struct Constants {
-        public var updatesAnimationDuration: NSTimeInterval = 0.33
+        public var updatesAnimationDuration: TimeInterval = 0.33
         public var defaultContentInsets = UIEdgeInsets(top: 10, left: 0, bottom: 10, right: 0)
-        public var defaultScrollIndicatorInsets = UIEdgeInsetsZero
+        public var defaultScrollIndicatorInsets = UIEdgeInsets.zero
         public var preferredMaxMessageCount: Int? = 500 // If not nil, will ask data source to reduce number of messages when limit is reached. @see ChatDataSourceDelegateProtocol
         public var preferredMaxMessageCountAdjustment: Int = 400 // When the above happens, will ask to adjust with this value. It may be wise for this to be smaller to reduce number of adjustments
         public var autoloadingFractionalThreshold: CGFloat = 0.05 // in [0, 1]
@@ -54,12 +54,12 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
             return _chatDataSource
         }
         set {
-            self.setChatDataSource(newValue, triggeringUpdateType: .Normal)
+            self.setChatDataSource(newValue, triggeringUpdateType: .normal)
         }
     }
 
     // Custom update on setting the data source. if triggeringUpdateType is nil it won't enqueue any update (you should do it later manually)
-    public final func setChatDataSource(dataSource: ChatDataSourceProtocol?, triggeringUpdateType updateType: UpdateType?) {
+    public final func setChatDataSource(_ dataSource: ChatDataSourceProtocol?, triggeringUpdateType updateType: UpdateType?) {
         self._chatDataSource = dataSource
         self._chatDataSource?.delegate = self
         if let updateType = updateType {
@@ -72,12 +72,12 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
         self.collectionView?.dataSource = nil
     }
 
-    public override func loadView() {
+    open override func loadView() {
         self.view = BaseChatViewControllerView() // http://stackoverflow.com/questions/24596031/uiviewcontroller-with-inputaccessoryview-is-not-deallocated
-        self.view.backgroundColor = UIColor.whiteColor()
+        self.view.backgroundColor = UIColor.white
     }
 
-    override public func viewDidLoad() {
+    override open func viewDidLoad() {
         super.viewDidLoad()
         self.addCollectionView()
         self.addInputViews()
@@ -91,39 +91,39 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
 
     public var endsEditingWhenTappingOnChatBackground = true
     @objc
-    public func userDidTapOnCollectionView() {
+    open func userDidTapOnCollectionView() {
         if self.endsEditingWhenTappingOnChatBackground {
             self.view.endEditing(true)
         }
     }
 
-    public override func viewWillAppear(animated: Bool) {
+    open override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         self.keyboardTracker.startTracking()
     }
 
-    public override func viewWillDisappear(animated: Bool) {
+    open override func viewWillDisappear(_ animated: Bool) {
         super.viewWillDisappear(animated)
         self.keyboardTracker.stopTracking()
     }
 
     private func addCollectionView() {
-        self.collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: self.createCollectionViewLayout)
+        self.collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: self.createCollectionViewLayout())
         self.collectionView.contentInset = self.constants.defaultContentInsets
         self.collectionView.scrollIndicatorInsets = self.constants.defaultScrollIndicatorInsets
         self.collectionView.alwaysBounceVertical = true
-        self.collectionView.backgroundColor = UIColor.clearColor()
-        self.collectionView.keyboardDismissMode = .Interactive
+        self.collectionView.backgroundColor = UIColor.clear
+        self.collectionView.keyboardDismissMode = .interactive
         self.collectionView.showsVerticalScrollIndicator = true
         self.collectionView.showsHorizontalScrollIndicator = false
         self.collectionView.allowsSelection = false
         self.collectionView.translatesAutoresizingMaskIntoConstraints = false
-        self.collectionView.autoresizingMask = .None
+        self.collectionView.autoresizingMask = UIViewAutoresizing()
         self.view.addSubview(self.collectionView)
-        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .Top, relatedBy: .Equal, toItem: self.collectionView, attribute: .Top, multiplier: 1, constant: 0))
-        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .Leading, relatedBy: .Equal, toItem: self.collectionView, attribute: .Leading, multiplier: 1, constant: 0))
-        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .Bottom, relatedBy: .Equal, toItem: self.collectionView, attribute: .Bottom, multiplier: 1, constant: 0))
-        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .Trailing, relatedBy: .Equal, toItem: self.collectionView, attribute: .Trailing, multiplier: 1, constant: 0))
+        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .top, relatedBy: .equal, toItem: self.collectionView, attribute: .top, multiplier: 1, constant: 0))
+        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .leading, relatedBy: .equal, toItem: self.collectionView, attribute: .leading, multiplier: 1, constant: 0))
+        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .bottom, relatedBy: .equal, toItem: self.collectionView, attribute: .bottom, multiplier: 1, constant: 0))
+        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .trailing, relatedBy: .equal, toItem: self.collectionView, attribute: .trailing, multiplier: 1, constant: 0))
         self.collectionView.dataSource = self
         self.collectionView.delegate = self
         self.accessoryViewRevealer = AccessoryViewRevealer(collectionView: self.collectionView)
@@ -140,25 +140,25 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
     private var inputContainerBottomConstraint: NSLayoutConstraint!
     private func addInputViews() {
         self.inputContainer = UIView(frame: CGRect.zero)
-        self.inputContainer.autoresizingMask = .None
+        self.inputContainer.autoresizingMask = UIViewAutoresizing()
         self.inputContainer.translatesAutoresizingMaskIntoConstraints = false
         self.view.addSubview(self.inputContainer)
-        self.view.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .Top, relatedBy: .GreaterThanOrEqual, toItem: self.topLayoutGuide, attribute: .Bottom, multiplier: 1, constant: 0))
-        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .Leading, relatedBy: .Equal, toItem: self.inputContainer, attribute: .Leading, multiplier: 1, constant: 0))
-        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .Trailing, relatedBy: .Equal, toItem: self.inputContainer, attribute: .Trailing, multiplier: 1, constant: 0))
-        self.inputContainerBottomConstraint = NSLayoutConstraint(item: self.view, attribute: .Bottom, relatedBy: .Equal, toItem: self.inputContainer, attribute: .Bottom, multiplier: 1, constant: 0)
+        self.view.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .top, relatedBy: .greaterThanOrEqual, toItem: self.topLayoutGuide, attribute: .bottom, multiplier: 1, constant: 0))
+        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .leading, relatedBy: .equal, toItem: self.inputContainer, attribute: .leading, multiplier: 1, constant: 0))
+        self.view.addConstraint(NSLayoutConstraint(item: self.view, attribute: .trailing, relatedBy: .equal, toItem: self.inputContainer, attribute: .trailing, multiplier: 1, constant: 0))
+        self.inputContainerBottomConstraint = NSLayoutConstraint(item: self.view, attribute: .bottom, relatedBy: .equal, toItem: self.inputContainer, attribute: .bottom, multiplier: 1, constant: 0)
         self.view.addConstraint(self.inputContainerBottomConstraint)
 
         let inputView = self.createChatInputView()
         self.inputContainer.addSubview(inputView)
-        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .Top, relatedBy: .Equal, toItem: inputView, attribute: .Top, multiplier: 1, constant: 0))
-        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .Leading, relatedBy: .Equal, toItem: inputView, attribute: .Leading, multiplier: 1, constant: 0))
-        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .Bottom, relatedBy: .Equal, toItem: inputView, attribute: .Bottom, multiplier: 1, constant: 0))
-        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .Trailing, relatedBy: .Equal, toItem: inputView, attribute: .Trailing, multiplier: 1, constant: 0))
+        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .top, relatedBy: .equal, toItem: inputView, attribute: .top, multiplier: 1, constant: 0))
+        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .leading, relatedBy: .equal, toItem: inputView, attribute: .leading, multiplier: 1, constant: 0))
+        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .bottom, relatedBy: .equal, toItem: inputView, attribute: .bottom, multiplier: 1, constant: 0))
+        self.inputContainer.addConstraint(NSLayoutConstraint(item: self.inputContainer, attribute: .trailing, relatedBy: .equal, toItem: inputView, attribute: .trailing, multiplier: 1, constant: 0))
     }
 
     var isAdjustingInputContainer: Bool = false
-    public func setupKeyboardTracker() {
+    open func setupKeyboardTracker() {
         let layoutBlock = { [weak self] (bottomMargin: CGFloat) in
             guard let sSelf = self else { return }
             sSelf.isAdjustingInputContainer = true
@@ -170,11 +170,11 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
         (self.view as? BaseChatViewControllerView)?.bmaInputAccessoryView = self.keyboardTracker?.trackingView
     }
 
-    var notificationCenter = NSNotificationCenter.defaultCenter()
+    var notificationCenter = NotificationCenter.default
     var keyboardTracker: KeyboardTracker!
 
-    public var isFirstLayout: Bool = true
-    override public func viewDidLayoutSubviews() {
+    public private(set) var isFirstLayout: Bool = true
+    override open func viewDidLayoutSubviews() {
         super.viewDidLayoutSubviews()
 
         self.adjustCollectionViewInsets()
@@ -185,7 +185,8 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
             self.isFirstLayout = false
             // If we have been pushed on nav controller and hidesBottomBarWhenPushed = true, then ignore bottomLayoutMargin
             // because it has incorrect value when we actually have a bottom bar (tabbar)
-            if hidesBottomBarWhenPushed && navigationController?.viewControllers.count > 1 && navigationController?.viewControllers.last == self {
+
+            if self.hidesBottomBarWhenPushed && (navigationController?.viewControllers.count ?? 0) > 1 && navigationController?.viewControllers.last == self {
                 self.inputContainerBottomConstraint.constant = 0
             } else {
                 self.inputContainerBottomConstraint.constant = self.bottomLayoutGuide.length
@@ -194,7 +195,7 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
     }
 
     private func adjustCollectionViewInsets() {
-        let isInteracting = self.collectionView.panGestureRecognizer.numberOfTouches() > 0
+        let isInteracting = self.collectionView.panGestureRecognizer.numberOfTouches > 0
         let isBouncingAtTop = isInteracting && self.collectionView.contentOffset.y < -self.collectionView.contentInset.top
         if isBouncingAtTop { return }
 
@@ -203,7 +204,7 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
         let insetBottomDiff = newInsetBottom - self.collectionView.contentInset.bottom
         let newInsetTop = self.topLayoutGuide.length + self.constants.defaultContentInsets.top
 
-        let contentSize = self.collectionView.collectionViewLayout.collectionViewContentSize()
+        let contentSize = self.collectionView.collectionViewLayout.collectionViewContentSize
         let allContentFits: Bool = {
             let availableHeight = self.collectionView.bounds.height - (newInsetTop + newInsetBottom)
             return availableHeight >= contentSize.height
@@ -239,9 +240,9 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
         }
     }
 
-    func rectAtIndexPath(indexPath: NSIndexPath?) -> CGRect? {
+    func rectAtIndexPath(_ indexPath: IndexPath?) -> CGRect? {
         if let indexPath = indexPath {
-            return self.collectionView.collectionViewLayout.layoutAttributesForItemAtIndexPath(indexPath)?.frame
+            return self.collectionView.collectionViewLayout.layoutAttributesForItem(at: indexPath)?.frame
         }
         return nil
     }
@@ -250,8 +251,8 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
     var accessoryViewRevealer: AccessoryViewRevealer!
     public private(set) var inputContainer: UIView!
     var presenterFactory: ChatItemPresenterFactoryProtocol!
-    let presentersByCell = NSMapTable(keyOptions: .WeakMemory, valueOptions: .WeakMemory)
-    var visibleCells: [NSIndexPath: UICollectionViewCell] = [:] // @see visibleCellsAreValid(changes:)
+    let presentersByCell = NSMapTable<UICollectionViewCell, AnyObject>(keyOptions: .weakMemory, valueOptions: .weakMemory)
+    var visibleCells: [IndexPath: UICollectionViewCell] = [:] // @see visibleCellsAreValid(changes:)
 
     public internal(set) var updateQueue: SerialTaskQueueProtocol = SerialTaskQueue()
 
@@ -263,7 +264,7 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
     */
     public var chatItemsDecorator: ChatItemsDecoratorProtocol?
 
-    public var createCollectionViewLayout: UICollectionViewLayout {
+    open func createCollectionViewLayout() -> UICollectionViewLayout {
         let layout = ChatCollectionViewLayout()
         layout.delegate = self
         return layout
@@ -273,17 +274,17 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
 
     // MARK: Subclass overrides
 
-    public func createPresenterFactory() -> ChatItemPresenterFactoryProtocol {
+    open func createPresenterFactory() -> ChatItemPresenterFactoryProtocol {
         // Default implementation
         return ChatItemPresenterFactory(presenterBuildersByType: self.createPresenterBuilders())
     }
 
-    public func createPresenterBuilders() -> [ChatItemType: [ChatItemPresenterBuilderProtocol]] {
+    open func createPresenterBuilders() -> [ChatItemType: [ChatItemPresenterBuilderProtocol]] {
         assert(false, "Override in subclass")
         return [ChatItemType: [ChatItemPresenterBuilderProtocol]]()
     }
 
-    public func createChatInputView() -> UIView {
+    open func createChatInputView() -> UIView {
         assert(false, "Override in subclass")
         return UIView()
     }
@@ -292,20 +293,20 @@ public class BaseChatViewController: UIViewController, UICollectionViewDataSourc
         When paginating up we need to change the scroll position as the content is pushed down.
         We take distance to top from beforeUpdate indexPath and then we make afterUpdate indexPath to appear at the same distance
     */
-    public func referenceIndexPathsToRestoreScrollPositionOnUpdate(itemsBeforeUpdate itemsBeforeUpdate: ChatItemCompanionCollection, changes: CollectionChanges) -> (beforeUpdate: NSIndexPath?, afterUpdate: NSIndexPath?) {
+    open func referenceIndexPathsToRestoreScrollPositionOnUpdate(itemsBeforeUpdate: ChatItemCompanionCollection, changes: CollectionChanges) -> (beforeUpdate: IndexPath?, afterUpdate: IndexPath?) {
         let firstItemMoved = changes.movedIndexPaths.first
-        return (firstItemMoved?.indexPathOld, firstItemMoved?.indexPathNew)
+        return (firstItemMoved?.indexPathOld as IndexPath?, firstItemMoved?.indexPathNew as IndexPath?)
     }
 }
 
 extension BaseChatViewController { // Rotation
 
-    public override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
-        super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
+    open override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
+        super.viewWillTransition(to: size, with: coordinator)
         let shouldScrollToBottom = self.isScrolledAtBottom()
-        let referenceIndexPath = self.collectionView.indexPathsForVisibleItems().first
+        let referenceIndexPath = self.collectionView.indexPathsForVisibleItems.first
         let oldRect = self.rectAtIndexPath(referenceIndexPath)
-        coordinator.animateAlongsideTransition({ (context) -> Void in
+        coordinator.animate(alongsideTransition: { (context) -> Void in
             if shouldScrollToBottom {
                 self.scrollToBottom(animated: false)
             } else {

Chatto/Source/ChatController/Collaborators/AccessoryViewRevealer.swift

@@ -32,8 +32,8 @@ public protocol AccessoryViewRevealable {
 
 public struct AccessoryViewRevealerConfig {
     public let angleThresholdInRads: CGFloat
-    public let translationTransform: (rawTranslation: CGFloat) -> CGFloat
-    public init(angleThresholdInRads: CGFloat, translationTransform: (rawTranslation: CGFloat) -> CGFloat) {
+    public let translationTransform: (_ rawTranslation: CGFloat) -> CGFloat
+    public init(angleThresholdInRads: CGFloat, translationTransform: @escaping (_ rawTranslation: CGFloat) -> CGFloat) {
         self.angleThresholdInRads = angleThresholdInRads
         self.translationTransform = translationTransform
     }
@@ -68,51 +68,51 @@ class AccessoryViewRevealer: NSObject, UIGestureRecognizerDelegate {
 
     var isEnabled: Bool = true {
         didSet {
-            self.panRecognizer.enabled = self.isEnabled
+            self.panRecognizer.isEnabled = self.isEnabled
         }
     }
 
     var config = AccessoryViewRevealerConfig.defaultConfig()
 
     @objc
-    private func handlePan(panRecognizer: UIPanGestureRecognizer) {
+    private func handlePan(_ panRecognizer: UIPanGestureRecognizer) {
         switch panRecognizer.state {
-        case .Began:
+        case .began:
             break
-        case .Changed:
-            let translation = panRecognizer.translationInView(self.collectionView)
-            self.revealAccessoryView(atOffset: self.config.translationTransform(rawTranslation: -translation.x))
-        case .Ended, .Cancelled, .Failed:
+        case .changed:
+            let translation = panRecognizer.translation(in: self.collectionView)
+            self.revealAccessoryView(atOffset: self.config.translationTransform(-translation.x))
+        case .ended, .cancelled, .failed:
             self.revealAccessoryView(atOffset: 0)
         default:
             break
         }
     }
 
-    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
+    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
         return true
     }
 
-    func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
+    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
         if gestureRecognizer != self.panRecognizer {
             return true
         }
 
-        let translation = self.panRecognizer.translationInView(self.collectionView)
-        let x = CGFloat.abs(translation.x), y = CGFloat.abs(translation.y)
+        let translation = self.panRecognizer.translation(in: self.collectionView)
+        let x = abs(translation.x), y = abs(translation.y)
         let angleRads = atan2(y, x)
         return angleRads <= self.config.angleThresholdInRads
     }
 
     private func revealAccessoryView(atOffset offset: CGFloat) {
         // Find max offset (cells can have slighlty different timestamp size ( 3.00 am vs 11.37 pm )
-        let cells: [AccessoryViewRevealable] = self.collectionView.visibleCells().filter({$0 is AccessoryViewRevealable}).map({$0 as! AccessoryViewRevealable})
+        let cells: [AccessoryViewRevealable] = self.collectionView.visibleCells.flatMap({ $0 as? AccessoryViewRevealable })
         let offset = min(offset, cells.reduce(0) { (current, cell) -> CGFloat in
             return max(current, cell.preferredOffsetToRevealAccessoryView() ?? 0)
         })
 
-        for cell in self.collectionView.visibleCells() {
-            if let cell = cell as? AccessoryViewRevealable where cell.allowAccessoryViewRevealing {
+        for cell in self.collectionView.visibleCells {
+            if let cell = cell as? AccessoryViewRevealable, cell.allowAccessoryViewRevealing {
                 cell.revealAccessoryView(withOffset: offset, animated: offset == 0)
             }
         }

Chatto/Source/ChatController/Collaborators/ChatCollectionViewLayout.swift

@@ -34,18 +34,18 @@ public struct ChatCollectionViewLayoutModel {
     let layoutAttributesBySectionAndItem: [[UICollectionViewLayoutAttributes]]
     let calculatedForWidth: CGFloat
 
-    public static func createModel(collectionViewWidth: CGFloat, itemsLayoutData: [(height: CGFloat, bottomMargin: CGFloat)]) -> ChatCollectionViewLayoutModel {
+    public static func createModel(_ collectionViewWidth: CGFloat, itemsLayoutData: [(height: CGFloat, bottomMargin: CGFloat)]) -> ChatCollectionViewLayoutModel {
         var layoutAttributes = [UICollectionViewLayoutAttributes]()
         var layoutAttributesBySectionAndItem = [[UICollectionViewLayoutAttributes]]()
         layoutAttributesBySectionAndItem.append([UICollectionViewLayoutAttributes]())
 
         var verticalOffset: CGFloat = 0
-        for (index, layoutData) in itemsLayoutData.enumerate() {
-            let indexPath = NSIndexPath(forItem: index, inSection: 0)
+        for (index, layoutData) in itemsLayoutData.enumerated() {
+            let indexPath = IndexPath(item: index, section: 0)
             let (height, bottomMargin) = layoutData
             let itemSize = CGSize(width: collectionViewWidth, height: height)
             let frame = CGRect(origin: CGPoint(x: 0, y: verticalOffset), size: itemSize)
-            let attributes = UICollectionViewLayoutAttributes(forCellWithIndexPath: indexPath)
+            let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)
             attributes.frame = frame
             layoutAttributes.append(attributes)
             layoutAttributesBySectionAndItem[0].append(attributes)
@@ -62,27 +62,26 @@ public struct ChatCollectionViewLayoutModel {
     }
 }
 
-
-public class ChatCollectionViewLayout: UICollectionViewLayout {
+open class ChatCollectionViewLayout: UICollectionViewLayout {
     var layoutModel: ChatCollectionViewLayoutModel!
     public weak var delegate: ChatCollectionViewLayoutDelegate?
 
     // Optimization: after reloadData we'll get invalidateLayout, but prepareLayout will be delayed until next run loop.
     // Client may need to force prepareLayout after reloadData, but we don't want to compute layout again in the next run loop.
     private var layoutNeedsUpdate = true
-    public override func invalidateLayout() {
+    open override func invalidateLayout() {
         super.invalidateLayout()
         self.layoutNeedsUpdate = true
     }
 
-    public override func prepareLayout() {
-        super.prepareLayout()
+    open override func prepare() {
+        super.prepare()
         guard self.layoutNeedsUpdate else { return }
         guard let delegate = self.delegate else { return }
         var oldLayoutModel = self.layoutModel
         self.layoutModel = delegate.chatCollectionViewLayoutModel()
         self.layoutNeedsUpdate = false
-        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) { () -> Void in
+        DispatchQueue.global(qos: .default).async { () -> Void in
             // Dealloc of layout with 5000 items take 25 ms on tests on iPhone 4s
             // This moves dealloc out of main thread
             if oldLayoutModel != nil {
@@ -92,15 +91,15 @@ public class ChatCollectionViewLayout: UICollectionViewLayout {
         }
     }
 
-    public override func collectionViewContentSize() -> CGSize {
+    open override var collectionViewContentSize: CGSize {
         return self.layoutModel?.contentSize ?? .zero
     }
 
-    override public func layoutAttributesForElementsInRect(rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
+    open override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
         return self.layoutModel.layoutAttributes.filter { $0.frame.intersects(rect) }
     }
 
-    public override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? {
+    open override func layoutAttributesForItem(at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
         if indexPath.section < self.layoutModel.layoutAttributesBySectionAndItem.count && indexPath.item < self.layoutModel.layoutAttributesBySectionAndItem[indexPath.section].count {
             return self.layoutModel.layoutAttributesBySectionAndItem[indexPath.section][indexPath.item]
         }
@@ -108,7 +107,7 @@ public class ChatCollectionViewLayout: UICollectionViewLayout {
         return nil
     }
 
-    public override func shouldInvalidateLayoutForBoundsChange(newBounds: CGRect) -> Bool {
+    open override func shouldInvalidateLayout(forBoundsChange newBounds: CGRect) -> Bool {
         return self.layoutModel.calculatedForWidth != newBounds.width
     }
 }

Chatto/Source/ChatController/Collaborators/ChatDataSourceProtocol.swift

@@ -25,16 +25,16 @@
 import Foundation
 
 public enum UpdateType {
-    case Normal
-    case FirstLoad
-    case Pagination
-    case Reload
-    case MessageCountReduction
+    case normal
+    case firstLoad
+    case pagination
+    case reload
+    case messageCountReduction
 }
 
 public protocol ChatDataSourceDelegateProtocol: class {
-    func chatDataSourceDidUpdate(chatDataSource: ChatDataSourceProtocol)
-    func chatDataSourceDidUpdate(chatDataSource: ChatDataSourceProtocol, updateType: UpdateType)
+    func chatDataSourceDidUpdate(_ chatDataSource: ChatDataSourceProtocol)
+    func chatDataSourceDidUpdate(_ chatDataSource: ChatDataSourceProtocol, updateType: UpdateType)
 }
 
 public protocol ChatDataSourceProtocol: class {
@@ -45,5 +45,5 @@ public protocol ChatDataSourceProtocol: class {
 
     func loadNext() // Should trigger chatDataSourceDidUpdate with UpdateType.Pagination
     func loadPrevious() // Should trigger chatDataSourceDidUpdate with UpdateType.Pagination
-    func adjustNumberOfMessages(preferredMaxCount preferredMaxCount: Int?, focusPosition: Double, completion:(didAdjust: Bool) -> Void) // If you want, implement message count contention for performance, otherwise just call completion(false)
+    func adjustNumberOfMessages(preferredMaxCount: Int?, focusPosition: Double, completion:((didAdjust: Bool)) -> Void) // If you want, implement message count contention for performance, otherwise just call completion(false)
 }

Chatto/Source/ChatController/Collaborators/ChatItemPresenterFactory.swift

@@ -25,7 +25,7 @@
 import Foundation
 
 public protocol ChatItemPresenterFactoryProtocol {
-    func createChatItemPresenter(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol
+    func createChatItemPresenter(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol
     func configure(withCollectionView collectionView: UICollectionView)
 }
 
@@ -36,7 +36,7 @@ final class ChatItemPresenterFactory: ChatItemPresenterFactoryProtocol {
         self.presenterBuildersByType = presenterBuildersByType
     }
 
-    func createChatItemPresenter(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
+    func createChatItemPresenter(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
         for builder in self.presenterBuildersByType[chatItem.type] ?? [] {
             if builder.canHandleChatItem(chatItem) {
                 return builder.createPresenterWithChatItem(chatItem)

Chatto/Source/ChatController/Collaborators/CollectionChanges.swift

@@ -29,14 +29,14 @@ public protocol UniqueIdentificable {
 }
 
 public struct CollectionChangeMove: Equatable, Hashable {
-    public let indexPathOld: NSIndexPath
-    public let indexPathNew: NSIndexPath
-    public init(indexPathOld: NSIndexPath, indexPathNew: NSIndexPath) {
+    public let indexPathOld: IndexPath
+    public let indexPathNew: IndexPath
+    public init(indexPathOld: IndexPath, indexPathNew: IndexPath) {
         self.indexPathOld = indexPathOld
         self.indexPathNew = indexPathNew
     }
 
-    public var hashValue: Int { return indexPathOld.hash ^ indexPathNew.hash }
+    public var hashValue: Int { return indexPathOld.hashValue ^ indexPathNew.hashValue }
 }
 
 public func == (lhs: CollectionChangeMove, rhs: CollectionChangeMove) -> Bool {
@@ -44,21 +44,21 @@ public func == (lhs: CollectionChangeMove, rhs: CollectionChangeMove) -> Bool {
 }
 
 public struct CollectionChanges {
-    public let insertedIndexPaths: Set<NSIndexPath>
-    public let deletedIndexPaths: Set<NSIndexPath>
+    public let insertedIndexPaths: Set<IndexPath>
+    public let deletedIndexPaths: Set<IndexPath>
     public let movedIndexPaths: [CollectionChangeMove]
 
-    init(insertedIndexPaths: Set<NSIndexPath>, deletedIndexPaths: Set<NSIndexPath>, movedIndexPaths: [CollectionChangeMove]) {
+    init(insertedIndexPaths: Set<IndexPath>, deletedIndexPaths: Set<IndexPath>, movedIndexPaths: [CollectionChangeMove]) {
         self.insertedIndexPaths = insertedIndexPaths
         self.deletedIndexPaths = deletedIndexPaths
         self.movedIndexPaths = movedIndexPaths
     }
 }
 
-func generateChanges(oldCollection oldCollection: [UniqueIdentificable], newCollection: [UniqueIdentificable]) -> CollectionChanges {
-    func generateIndexesById(uids: [String]) -> [String: Int] {
+func generateChanges(oldCollection: [UniqueIdentificable], newCollection: [UniqueIdentificable]) -> CollectionChanges {
+    func generateIndexesById(_ uids: [String]) -> [String: Int] {
         var map = [String: Int](minimumCapacity: uids.count)
-        for (index, uid) in uids.enumerate() {
+        for (index, uid) in uids.enumerated() {
             map[uid] = index
         }
         return map
@@ -68,25 +68,25 @@ func generateChanges(oldCollection oldCollection: [UniqueIdentificable], newColl
     let newIds = newCollection.map { $0.uid }
     let oldIndexsById = generateIndexesById(oldIds)
     let newIndexsById = generateIndexesById(newIds)
-    var deletedIndexPaths = Set<NSIndexPath>()
-    var insertedIndexPaths = Set<NSIndexPath>()
+    var deletedIndexPaths = Set<IndexPath>()
+    var insertedIndexPaths = Set<IndexPath>()
     var movedIndexPaths = [CollectionChangeMove]()
 
     // Deletetions
     for oldId in oldIds {
         let isDeleted = newIndexsById[oldId] == nil
         if isDeleted {
-            deletedIndexPaths.insert(NSIndexPath(forItem: oldIndexsById[oldId]!, inSection: 0))
+            deletedIndexPaths.insert(IndexPath(item: oldIndexsById[oldId]!, section: 0))
         }
     }
 
     // Insertions and movements
     for newId in newIds {
         let newIndex = newIndexsById[newId]!
-        let newIndexPath = NSIndexPath(forItem: newIndex, inSection: 0)
+        let newIndexPath = IndexPath(item: newIndex, section: 0)
         if let oldIndex = oldIndexsById[newId] {
             if oldIndex != newIndex {
-                movedIndexPaths.append(CollectionChangeMove(indexPathOld: NSIndexPath(forItem: oldIndex, inSection: 0), indexPathNew: newIndexPath))
+                movedIndexPaths.append(CollectionChangeMove(indexPathOld: IndexPath(item: oldIndex, section: 0), indexPathNew: newIndexPath))
             }
         } else {
             // It's new
@@ -97,14 +97,14 @@ func generateChanges(oldCollection oldCollection: [UniqueIdentificable], newColl
     return CollectionChanges(insertedIndexPaths: insertedIndexPaths, deletedIndexPaths: deletedIndexPaths, movedIndexPaths: movedIndexPaths)
 }
 
-func updated<T: Any>(collection collection: [NSIndexPath: T], withChanges changes: CollectionChanges) -> [NSIndexPath: T] {
+func updated<T: Any>(collection: [IndexPath: T], withChanges changes: CollectionChanges) -> [IndexPath: T] {
     var result = collection
 
     changes.deletedIndexPaths.forEach { (indexPath) in
         result[indexPath] = nil
     }
 
-    var movedDestinations = Set<NSIndexPath>()
+    var movedDestinations = Set<IndexPath>()
     changes.movedIndexPaths.forEach { (move) in
         result[move.indexPathNew] = collection[move.indexPathOld]
         movedDestinations.insert(move.indexPathNew)

Chatto/Source/ChatController/Collaborators/KeyboardTracker.swift

@@ -27,12 +27,12 @@ import Foundation
 class KeyboardTracker {
 
     private enum KeyboardStatus {
-        case Hidden
-        case Showing
-        case Shown
+        case hidden
+        case showing
+        case shown
     }
 
-    private var keyboardStatus: KeyboardStatus = .Hidden
+    private var keyboardStatus: KeyboardStatus = .hidden
     private let view: UIView
     var trackingView: UIView {
         return self.keyboardTrackerView
@@ -50,20 +50,20 @@ class KeyboardTracker {
 
     var isTracking = false
     var inputContainer: UIView
-    private var notificationCenter: NSNotificationCenter
+    private var notificationCenter: NotificationCenter
 
-    typealias LayoutBlock = (bottomMargin: CGFloat) -> Void
+    typealias LayoutBlock = (_ bottomMargin: CGFloat) -> Void
     private var layoutBlock: LayoutBlock
 
-    init(viewController: UIViewController, inputContainer: UIView, layoutBlock: LayoutBlock, notificationCenter: NSNotificationCenter) {
+    init(viewController: UIViewController, inputContainer: UIView, layoutBlock: @escaping LayoutBlock, notificationCenter: NotificationCenter) {
         self.view = viewController.view
         self.layoutBlock = layoutBlock
         self.inputContainer = inputContainer
         self.notificationCenter = notificationCenter
-        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardWillShow(_:)), name: UIKeyboardWillShowNotification, object: nil)
-        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardDidShow(_:)), name: UIKeyboardDidShowNotification, object: nil)
-        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardWillHide(_:)), name: UIKeyboardWillHideNotification, object: nil)
-        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardWillChangeFrame(_:)), name: UIKeyboardWillChangeFrameNotification, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardWillShow(_:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardDidShow(_:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardWillHide(_:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(KeyboardTracker.keyboardWillChangeFrame(_:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
     }
 
     deinit {
@@ -79,60 +79,60 @@ class KeyboardTracker {
     }
 
     @objc
-    private func keyboardWillShow(notification: NSNotification) {
+    private func keyboardWillShow(_ notification: Notification) {
         guard self.isTracking else { return }
-        guard !self.isPerformingForcedLayout else { return}
+        guard !self.isPerformingForcedLayout else { return }
         let bottomConstraint = self.bottomConstraintFromNotification(notification)
         guard bottomConstraint > 0 else { return } // Some keyboards may report initial willShow/DidShow notifications with invalid positions
-        self.keyboardStatus = .Showing
+        self.keyboardStatus = .showing
         self.layoutInputContainer(withBottomConstraint: bottomConstraint)
     }
 
     @objc
-    private func keyboardDidShow(notification: NSNotification) {
+    private func keyboardDidShow(_ notification: Notification) {
         guard self.isTracking else { return }
-        guard !self.isPerformingForcedLayout else { return}
+        guard !self.isPerformingForcedLayout else { return }
 
         let bottomConstraint = self.bottomConstraintFromNotification(notification)
         guard bottomConstraint > 0 else { return } // Some keyboards may report initial willShow/DidShow notifications with invalid positions
-        self.keyboardStatus = .Shown
+        self.keyboardStatus = .shown
         self.layoutInputContainer(withBottomConstraint: bottomConstraint)
         self.adjustTrackingViewSizeIfNeeded()
     }
 
     @objc
-    private func keyboardWillChangeFrame(notification: NSNotification) {
+    private func keyboardWillChangeFrame(_ notification: Notification) {
         guard self.isTracking else { return }
         let bottomConstraint = self.bottomConstraintFromNotification(notification)
         if bottomConstraint == 0 {
-            self.keyboardStatus = .Hidden
+            self.keyboardStatus = .hidden
             self.layoutInputAtBottom()
         }
     }
 
     @objc
-    private func keyboardWillHide(notification: NSNotification) {
+    private func keyboardWillHide(_ notification: Notification) {
         guard self.isTracking else { return }
-        self.keyboardStatus = .Hidden
+        self.keyboardStatus = .hidden
         self.layoutInputAtBottom()
     }
 
-    private func bottomConstraintFromNotification(notification: NSNotification) -> CGFloat {
-        guard let rect = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() else { return 0 }
+    private func bottomConstraintFromNotification(_ notification: Notification) -> CGFloat {
+        guard let rect = ((notification as NSNotification).userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else { return 0 }
         guard rect.height > 0 else { return 0 }
-        let rectInView = self.view.convertRect(rect, fromView: nil)
+        let rectInView = self.view.convert(rect, from: nil)
         guard rectInView.maxY >=~ self.view.bounds.height else { return 0 } // Undocked keyboard
-        return max(0, self.view.bounds.height - rectInView.minY - self.keyboardTrackerView.intrinsicContentSize().height)
+        return max(0, self.view.bounds.height - rectInView.minY - self.keyboardTrackerView.intrinsicContentSize.height)
     }
 
     private func bottomConstraintFromTrackingView() -> CGFloat {
         guard self.keyboardTrackerView.superview != nil else { return 0 }
-        let trackingViewRect = self.view.convertRect(self.keyboardTrackerView.bounds, fromView: self.keyboardTrackerView)
+        let trackingViewRect = self.view.convert(self.keyboardTrackerView.bounds, from: self.keyboardTrackerView)
         return max(0, self.view.bounds.height - trackingViewRect.maxY)
     }
 
     func adjustTrackingViewSizeIfNeeded() {
-        guard self.isTracking && self.keyboardStatus == .Shown else { return }
+        guard self.isTracking && self.keyboardStatus == .shown else { return }
         self.adjustTrackingViewSize()
     }
 
@@ -153,13 +153,13 @@ class KeyboardTracker {
 
     var isPerformingForcedLayout: Bool = false
     func layoutInputAtTrackingViewIfNeeded() {
-        guard self.isTracking && self.keyboardStatus == .Shown else { return }
+        guard self.isTracking && self.keyboardStatus == .shown else { return }
         self.layoutInputContainer(withBottomConstraint: self.bottomConstraintFromTrackingView())
     }
 
     private func layoutInputContainer(withBottomConstraint constraint: CGFloat) {
         self.isPerformingForcedLayout = true
-        self.layoutBlock(bottomMargin: constraint)
+        self.layoutBlock(constraint)
         self.isPerformingForcedLayout = false
     }
 }
@@ -185,14 +185,14 @@ private class KeyboardTrackingView: UIView {
         self.commonInit()
     }
 
-    private func commonInit() {
-        self.autoresizingMask = .FlexibleHeight
-        self.userInteractionEnabled = false
-        self.backgroundColor = UIColor.clearColor()
-        self.hidden = true
+    func commonInit() {
+        self.autoresizingMask = .flexibleHeight
+        self.isUserInteractionEnabled = false
+        self.backgroundColor = UIColor.clear
+        self.isHidden = true
     }
 
-    private var preferredSize: CGSize = .zero {
+    var preferredSize: CGSize = .zero {
         didSet {
             if oldValue != self.preferredSize {
                 self.invalidateIntrinsicContentSize()
@@ -201,30 +201,30 @@ private class KeyboardTrackingView: UIView {
         }
     }
 
-    private override func intrinsicContentSize() -> CGSize {
+    override var intrinsicContentSize: CGSize {
         return self.preferredSize
     }
 
-    override func willMoveToSuperview(newSuperview: UIView?) {
+    override func willMove(toSuperview newSuperview: UIView?) {
         if let observedView = self.observedView {
             observedView.removeObserver(self, forKeyPath: "center")
             self.observedView = nil
         }
 
         if let newSuperview = newSuperview {
-            newSuperview.addObserver(self, forKeyPath: "center", options: [.New, .Old], context: nil)
+            newSuperview.addObserver(self, forKeyPath: "center", options: [.new, .old], context: nil)
             self.observedView = newSuperview
         }
 
-        super.willMoveToSuperview(newSuperview)
+        super.willMove(toSuperview: newSuperview)
     }
 
-    private override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
-        guard let object = object, superview = self.superview else { return }
+    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
+        guard let object = object as? UIView, let superview = self.superview else { return }
         if object === superview {
             guard let sChange = change else { return }
-            let oldCenter = (sChange[NSKeyValueChangeOldKey] as! NSValue).CGPointValue()
-            let newCenter = (sChange[NSKeyValueChangeNewKey] as! NSValue).CGPointValue()
+            let oldCenter = (sChange[NSKeyValueChangeKey.oldKey] as! NSValue).cgPointValue
+            let newCenter = (sChange[NSKeyValueChangeKey.newKey] as! NSValue).cgPointValue
             if oldCenter != newCenter {
                 self.positionChangedCallback?()
             }

Chatto/Source/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.1.0</string>
+	<string>3.0.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Chatto/Source/ReadOnlyOrderedDictionary.swift

@@ -1,43 +1,43 @@
 /*
-The MIT License (MIT)
+ The MIT License (MIT)
 
-Copyright (c) 2015-present Badoo Trading Limited.
+ Copyright (c) 2015-present Badoo Trading Limited.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
 */
 import Foundation
 
-public struct ReadOnlyOrderedDictionary<T where T: UniqueIdentificable>: CollectionType {
+public struct ReadOnlyOrderedDictionary<T>: Collection where T: UniqueIdentificable {
 
     private let items: [T]
     private let itemIndexesById: [String: Int] // Maping to the position in the array instead the item itself for better performance
 
     public init(items: [T]) {
         var dictionary = [String: Int](minimumCapacity: items.count)
-        for (index, item) in items.enumerate() {
+        for (index, item) in items.enumerated() {
             dictionary[item.uid] = index
         }
         self.items = items
         self.itemIndexesById = dictionary
     }
 
-    public func indexOf(uid: String) -> Int? {
+    public func indexOf(_ uid: String) -> Int? {
         return self.itemIndexesById[uid]
     }
 
@@ -52,8 +52,20 @@ public struct ReadOnlyOrderedDictionary<T where T: UniqueIdentificable>: Collect
         return nil
     }
 
-    public func generate() -> IndexingGenerator<[T]> {
-        return self.items.generate()
+    public func makeIterator() -> IndexingIterator<[T]> {
+        return self.items.makeIterator()
+    }
+
+    public func index(_ i: Int, offsetBy n: Int) -> Int {
+        return self.items.index(i, offsetBy: n)
+    }
+
+    public func index(_ i: Int, offsetBy n: Int, limitedBy limit: Int) -> Int? {
+        return self.items.index(i, offsetBy: n, limitedBy: limit)
+    }
+
+    public func index(after i: Int) -> Int {
+        return self.items.index(after: i)
     }
 
     public var startIndex: Int {

Chatto/Source/SerialTaskQueue.swift

@@ -24,10 +24,10 @@
 
 import Foundation
 
-public typealias TaskClosure = (completion: () -> Void) -> Void
+public typealias TaskClosure = (_ completion: @escaping () -> Void) -> Void
 
 public protocol SerialTaskQueueProtocol {
-    func addTask(task: TaskClosure)
+    func addTask(_ task: @escaping TaskClosure)
     func start()
     func stop()
     func flushQueue()
@@ -43,7 +43,7 @@ public final class SerialTaskQueue: SerialTaskQueueProtocol {
 
     public init() {}
 
-    public func addTask(task: TaskClosure) {
+    public func addTask(_ task: @escaping TaskClosure) {
         self.tasksQueue.append(task)
         self.maybeExecuteNextTask()
     }
@@ -70,7 +70,7 @@ public final class SerialTaskQueue: SerialTaskQueueProtocol {
             if !self.isEmpty {
                 let firstTask = self.tasksQueue.removeFirst()
                 self.isBusy = true
-                firstTask(completion: { [weak self] () -> Void in
+                firstTask({ [weak self] () -> Void in
                     self?.isBusy = false
                     self?.maybeExecuteNextTask()
                 })

Chatto/Source/Utils.swift

@@ -24,9 +24,9 @@
 
 import Foundation
 
-private let scale = UIScreen.mainScreen().scale
+private let scale = UIScreen.main.scale
 
-infix operator >=~ { }
+infix operator >=~
 func >=~ (lhs: CGFloat, rhs: CGFloat) -> Bool {
     return round(lhs * scale) >= round(rhs * scale)
 }

Chatto/Tests/Chat Items/BaseChatItemPresenterTests.swift

@@ -30,6 +30,7 @@ class BaseChatItemPresenterTests: XCTestCase {
     var presenter: BaseChatItemPresenter<UICollectionViewCell>!
 
     override func setUp() {
+        super.setUp()
         self.presenter = BaseChatItemPresenter()
     }
 

Chatto/Tests/ChatController/BaseChatViewControllerTestHelpers.swift

@@ -24,7 +24,7 @@ THE SOFTWARE.
 
 @testable import Chatto
 
-func createFakeChatItems(count count: Int) -> [ChatItemProtocol] {
+func createFakeChatItems(count: Int) -> [ChatItemProtocol] {
     var items = [ChatItemProtocol]()
     for i in 0..<count {
         items.append(FakeChatItem(uid: "\(i)", type: "fake-type"))
@@ -66,29 +66,29 @@ class FakeDataSource: ChatDataSourceProtocol {
         if let chatItemsForLoadNext = self.chatItemsForLoadNext {
             self.chatItems = chatItemsForLoadNext
         }
-        self.delegate?.chatDataSourceDidUpdate(self, updateType: .Pagination)
+        self.delegate?.chatDataSourceDidUpdate(self, updateType: .pagination)
     }
 
     func loadPrevious() {
         self.wasRequestedForPrevious = true
-        self.delegate?.chatDataSourceDidUpdate(self, updateType: .Pagination)
+        self.delegate?.chatDataSourceDidUpdate(self, updateType: .pagination)
     }
 
-    func adjustNumberOfMessages(preferredMaxCount preferredMaxCount: Int?, focusPosition: Double, completion:(didAdjust: Bool) -> Void) {
+    func adjustNumberOfMessages(preferredMaxCount: Int?, focusPosition: Double, completion:((didAdjust: Bool)) -> Void) {
         self.wasRequestedForMessageCountContention = true
-        completion(didAdjust: false)
+        completion((didAdjust: false))
     }
 }
 
-class FakeCell: UICollectionViewCell { }
+class FakeCell: UICollectionViewCell {}
 
 class FakePresenterBuilder: ChatItemPresenterBuilderProtocol {
     var presentersCreatedCount: Int = 0
-    func canHandleChatItem(chatItem: ChatItemProtocol) -> Bool {
+    func canHandleChatItem(_ chatItem: ChatItemProtocol) -> Bool {
         return chatItem.type == "fake-type"
     }
 
-    func createPresenterWithChatItem(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
+    func createPresenterWithChatItem(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
         self.presentersCreatedCount += 1
         return FakePresenter()
     }
@@ -99,21 +99,21 @@ class FakePresenterBuilder: ChatItemPresenterBuilderProtocol {
 }
 
 class FakePresenter: BaseChatItemPresenter<FakeCell> {
-    override class func registerCells(collectionView: UICollectionView) {
-        collectionView.registerClass(FakeCell.self, forCellWithReuseIdentifier: "fake-cell")
+    override class func registerCells(_ collectionView: UICollectionView) {
+        collectionView.register(FakeCell.self, forCellWithReuseIdentifier: "fake-cell")
     }
 
     override func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
         return 10
     }
 
-    override func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
-        return collectionView.dequeueReusableCellWithReuseIdentifier("fake-cell", forIndexPath: indexPath)
+    override func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
+        return collectionView.dequeueReusableCell(withReuseIdentifier: "fake-cell", for: indexPath as IndexPath)
     }
 
-    override func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
+    override func configureCell(_ cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
         let fakeCell = cell as! FakeCell
-        fakeCell.backgroundColor = UIColor.redColor()
+        fakeCell.backgroundColor = UIColor.red
     }
 }
 
@@ -127,13 +127,14 @@ class FakeChatItem: ChatItemProtocol {
 }
 
 final class SerialTaskQueueTestHelper: SerialTaskQueueProtocol {
+
     var onAllTasksFinished: (() -> Void)?
 
     var isBusy = false
     var isStopped = true
     var tasksQueue = [TaskClosure]()
 
-    func addTask(task: TaskClosure) {
+    func addTask(_ task: @escaping TaskClosure) {
         self.tasksQueue.append(task)
         self.maybeExecuteNextTask()
     }
@@ -160,7 +161,7 @@ final class SerialTaskQueueTestHelper: SerialTaskQueueProtocol {
             if !self.isEmpty {
                 let firstTask = self.tasksQueue.removeFirst()
                 self.isBusy = true
-                firstTask(completion: { [weak self] () -> Void in
+                firstTask({ [weak self] () -> Void in
                     self?.isBusy = false
                     self?.maybeExecuteNextTask()
                     })

Chatto/Tests/ChatController/BaseChatViewControllerTests.swift

@@ -61,7 +61,7 @@ class ChatViewControllerTests: XCTestCase {
     }
 
     func testThat_WhenDataSourceChanges_ThenCollectionViewUpdatesAsynchronously() {
-        let asyncExpectation = expectationWithDescription("update")
+        let asyncExpectation = expectation(description: "update")
         let presenterBuilder = FakePresenterBuilder()
         let controller = TesteableChatViewController(presenterBuilders: ["fake-type": [presenterBuilder]])
         let fakeDataSource = FakeDataSource()
@@ -74,7 +74,7 @@ class ChatViewControllerTests: XCTestCase {
             asyncExpectation.fulfill()
             completion()
         }
-        self.waitForExpectationsWithTimeout(1) { (error) -> Void in
+        self.waitForExpectations(timeout: 1) { (error) -> Void in
             XCTAssertEqual(3, controller.collectionView(controller.collectionView, numberOfItemsInSection: 0))
         }
     }
@@ -91,7 +91,7 @@ class ChatViewControllerTests: XCTestCase {
     }
 
     func testThat_GivenManyItems_WhenScrollToTop_ThenLoadsPreviousPage() {
-        let asyncExpectation = expectationWithDescription("update")
+        let asyncExpectation = expectation(description: "update")
         let presenterBuilder = FakePresenterBuilder()
         let controller = TesteableChatViewController(presenterBuilders: ["fake-type": [presenterBuilder]])
         let fakeDataSource = FakeDataSource()
@@ -105,13 +105,13 @@ class ChatViewControllerTests: XCTestCase {
             completion()
             asyncExpectation.fulfill()
         }
-        self.waitForExpectationsWithTimeout(1) { (error) -> Void in
+        self.waitForExpectations(timeout: 1) { (error) -> Void in
             XCTAssertTrue(fakeDataSource.wasRequestedForPrevious)
         }
     }
 
     func testThat_WhenLoadsNextPage_ThenPreservesScrollPosition() {
-        let asyncExpectation = expectationWithDescription("update")
+        let asyncExpectation = expectation(description: "update")
         let presenterBuilder = FakePresenterBuilder()
         let controller = TesteableChatViewController(presenterBuilders: ["fake-type": [presenterBuilder]])
         let fakeDataSource = FakeDataSource()
@@ -129,14 +129,14 @@ class ChatViewControllerTests: XCTestCase {
             completion()
         }
 
-        self.waitForExpectationsWithTimeout(1) { (error) -> Void in
+        self.waitForExpectations(timeout: 1) { (error) -> Void in
             XCTAssertEqual(3000, controller.collectionView(controller.collectionView, numberOfItemsInSection: 0))
             XCTAssertEqual(contentOffset, controller.collectionView.contentOffset)
         }
     }
 
     func testThat_WhenManyMessagesAreLoaded_ThenRequestForMessageCountContention() {
-        let asyncExpectation = expectationWithDescription("update")
+        let asyncExpectation = expectation(description: "update")
         let updateQueue = SerialTaskQueueTestHelper()
         let presenterBuilder = FakePresenterBuilder()
         let controller = TesteableChatViewController(presenterBuilders: ["fake-type": [presenterBuilder]])
@@ -148,13 +148,13 @@ class ChatViewControllerTests: XCTestCase {
         updateQueue.onAllTasksFinished = {
             asyncExpectation.fulfill()
         }
-        self.waitForExpectationsWithTimeout(1) { (error) -> Void in
+        self.waitForExpectations(timeout: 1) { (error) -> Void in
             XCTAssertTrue(fakeDataSource.wasRequestedForMessageCountContention)
         }
     }
 
     func testThat_WhenUpdatesFinish_ControllerIsNotRetained() {
-        let asyncExpectation = expectationWithDescription("update")
+        let asyncExpectation = expectation(description: "update")
         let updateQueue = SerialTaskQueueTestHelper()
         var controller: TesteableChatViewController! = TesteableChatViewController(presenterBuilders: ["fake-type": [FakePresenterBuilder()]])
         weak var weakController = controller
@@ -171,7 +171,7 @@ class ChatViewControllerTests: XCTestCase {
         updateQueue.onAllTasksFinished = {
             asyncExpectation.fulfill()
         }
-        self.waitForExpectationsWithTimeout(1) { (error) -> Void in
+        self.waitForExpectations(timeout: 1) { (error) -> Void in
             controller = nil
             XCTAssertNil(weakController)
         }
@@ -193,28 +193,28 @@ class ChatViewControllerTests: XCTestCase {
 
     func testThat_LayoutAdaptsWhenKeyboardIsShown() {
         let controller = TesteableChatViewController()
-        let notificationCenter = NSNotificationCenter()
+        let notificationCenter = NotificationCenter()
         controller.notificationCenter = notificationCenter
         let fakeDataSource = FakeDataSource()
         fakeDataSource.chatItems = createFakeChatItems(count: 2)
         controller.chatDataSource = fakeDataSource
         self.fakeDidAppearAndLayout(controller: controller)
-        notificationCenter.postNotificationName(UIKeyboardWillShowNotification, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(CGRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
-        XCTAssertEqual(400, controller.view.convertRect(controller.chatInputView.bounds, fromView: controller.chatInputView).maxY)
+        notificationCenter.post(name: NSNotification.Name.UIKeyboardWillShow, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(cgRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
+        XCTAssertEqual(400, controller.view.convert(controller.chatInputView.bounds, from: controller.chatInputView).maxY)
     }
 
     func testThat_LayoutAdaptsWhenKeyboardIsHidden() {
         let controller = TesteableChatViewController()
-        let notificationCenter = NSNotificationCenter()
+        let notificationCenter = NotificationCenter()
         controller.notificationCenter = notificationCenter
         let fakeDataSource = FakeDataSource()
         fakeDataSource.chatItems = createFakeChatItems(count: 2)
         controller.chatDataSource = fakeDataSource
         self.fakeDidAppearAndLayout(controller: controller)
-        notificationCenter.postNotificationName(UIKeyboardWillShowNotification, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(CGRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
-        notificationCenter.postNotificationName(UIKeyboardDidShowNotification, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(CGRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
-        notificationCenter.postNotificationName(UIKeyboardWillHideNotification, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(CGRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
-        XCTAssertEqual(900, controller.view.convertRect(controller.chatInputView.bounds, fromView: controller.chatInputView).maxY)
+        notificationCenter.post(name: NSNotification.Name.UIKeyboardWillShow, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(cgRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
+        notificationCenter.post(name: NSNotification.Name.UIKeyboardDidShow, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(cgRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
+        notificationCenter.post(name: NSNotification.Name.UIKeyboardWillHide, object: self, userInfo: [UIKeyboardFrameEndUserInfoKey: NSValue(cgRect: CGRect(x: 0, y: 400, width: 400, height: 500))])
+        XCTAssertEqual(900, controller.view.convert(controller.chatInputView.bounds, from: controller.chatInputView).maxY)
     }
 
     func testThat_GivenCoalescingIsEnabled_WhenMultipleUpdatesAreRequested_ThenUpdatesAreCoalesced() {
@@ -225,7 +225,7 @@ class ChatViewControllerTests: XCTestCase {
         let updateQueue = SerialTaskQueueTestHelper()
         controller.updateQueue = updateQueue
 
-        controller.setChatDataSource(fakeDataSource, triggeringUpdateType: .None)
+        controller.setChatDataSource(fakeDataSource, triggeringUpdateType: .none)
         controller.chatDataSourceDidUpdate(fakeDataSource) // running
         controller.chatDataSourceDidUpdate(fakeDataSource) // discarded
         controller.chatDataSourceDidUpdate(fakeDataSource) // discarded
@@ -242,7 +242,7 @@ class ChatViewControllerTests: XCTestCase {
         controller.updateQueue = updateQueue
 
         updateQueue.start()
-        controller.setChatDataSource(fakeDataSource, triggeringUpdateType: .None)
+        controller.setChatDataSource(fakeDataSource, triggeringUpdateType: .none)
         controller.chatDataSourceDidUpdate(fakeDataSource) // running
         controller.chatDataSourceDidUpdate(fakeDataSource) // queued
         controller.chatDataSourceDidUpdate(fakeDataSource) // queued
@@ -253,7 +253,7 @@ class ChatViewControllerTests: XCTestCase {
 
     // MARK: helpers
 
-    private func fakeDidAppearAndLayout(controller controller: TesteableChatViewController) {
+    private func fakeDidAppearAndLayout(controller: TesteableChatViewController) {
         controller.view.frame = CGRect(x: 0, y: 0, width: 400, height: 900)
         controller.viewWillAppear(true)
         controller.viewDidAppear(true)

Chatto/Tests/ChatController/ChatCollectionViewLayoutTests.swift

@@ -33,7 +33,8 @@ class ChatCollectionViewLayoutModelTests: XCTestCase {
         XCTAssertEqual(width, layoutModel.calculatedForWidth)
         XCTAssertEqual(CGSize(width: 320, height: 0), layoutModel.contentSize)
         XCTAssertEqual([], layoutModel.layoutAttributes)
-        XCTAssertEqual([[]], layoutModel.layoutAttributesBySectionAndItem)
+        XCTAssertEqual(1, layoutModel.layoutAttributesBySectionAndItem.count)
+        XCTAssertEqual([], layoutModel.layoutAttributesBySectionAndItem.first!)
     }
 
     func testThatLayoutIsCorrectlyCreated() {
@@ -49,14 +50,14 @@ class ChatCollectionViewLayoutModelTests: XCTestCase {
         XCTAssertEqual(width, layoutModel.calculatedForWidth)
         XCTAssertEqual(CGSize(width: 320, height: 28), layoutModel.contentSize)
         XCTAssertEqual(expectedLayoutAttributes, layoutModel.layoutAttributes)
-        XCTAssertEqual([expectedLayoutAttributes], layoutModel.layoutAttributesBySectionAndItem)
+        XCTAssertEqual(1, layoutModel.layoutAttributesBySectionAndItem.count)
+        XCTAssertEqual(expectedLayoutAttributes, layoutModel.layoutAttributesBySectionAndItem.first!)
     }
-
 }
 
-private func Atttributes(item item: Int, frame: CGRect) -> UICollectionViewLayoutAttributes {
-    let indexPath = NSIndexPath(forItem: item, inSection: 0)
-    let attributes = UICollectionViewLayoutAttributes(forCellWithIndexPath: indexPath)
+private func Atttributes(item: Int, frame: CGRect) -> UICollectionViewLayoutAttributes {
+    let indexPath = IndexPath(item: item, section: 0)
+    let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)
     attributes.frame = frame
     return attributes
 }

Chatto/Tests/ChatController/CollectionChangesTests.swift

@@ -36,8 +36,8 @@ class CollectionChangesTests: XCTestCase {
 
     func testThatDoesNotGenerateChangesForEqualCollections() {
         let changes = generateChanges(
-            oldCollection: [Item("a"), Item("b")],
-            newCollection: [Item("a"), Item("b")]
+            oldCollection: [Item(uid: "a"), Item(uid: "b")],
+            newCollection: [Item(uid: "a"), Item(uid: "b")]
         )
         XCTAssertEqual(changes.insertedIndexPaths, [])
         XCTAssertEqual(changes.deletedIndexPaths, [])
@@ -47,27 +47,27 @@ class CollectionChangesTests: XCTestCase {
     func testThatGeneratesInsertions() {
         let changes = generateChanges(
             oldCollection: [],
-            newCollection: [Item("a"), Item("b")]
+            newCollection: [Item(uid: "a"), Item(uid: "b")]
         )
         XCTAssertEqual(changes.deletedIndexPaths, [])
         XCTAssertEqual(changes.movedIndexPaths, [])
-        XCTAssertEqual(Set(changes.insertedIndexPaths), Set([NSIndexPath(forItem: 0, inSection: 0), NSIndexPath(forItem: 1, inSection: 0)]))
+        XCTAssertEqual(Set(changes.insertedIndexPaths), Set([IndexPath(item: 0, section: 0), IndexPath(item: 1, section: 0)]))
     }
 
     func testThatGeneratesDeletions() {
         let changes = generateChanges(
-            oldCollection: [Item("a"), Item("b")],
+            oldCollection: [Item(uid: "a"), Item(uid: "b")],
             newCollection: []
         )
-        XCTAssertEqual(changes.deletedIndexPaths, Set([NSIndexPath(forItem: 0, inSection: 0), NSIndexPath(forItem: 1, inSection: 0)]))
+        XCTAssertEqual(changes.deletedIndexPaths, Set([IndexPath(item: 0, section: 0), IndexPath(item: 1, section: 0)]))
         XCTAssertEqual(changes.movedIndexPaths.count, 0)
         XCTAssertEqual(changes.insertedIndexPaths.count, 0)
     }
 
     func testThatGeneratesMovements() {
         let changes = generateChanges(
-            oldCollection: [Item("a"), Item("b"), Item("c")],
-            newCollection: [Item("a"), Item("c"), Item("b")]
+            oldCollection: [Item(uid: "a"), Item(uid: "b"), Item(uid: "c")],
+            newCollection: [Item(uid: "a"), Item(uid: "c"), Item(uid: "b")]
         )
         XCTAssertEqual(changes.deletedIndexPaths, [])
         XCTAssertEqual(Set(changes.movedIndexPaths), Set([Move(1, to: 2), Move(2, to:1)]))
@@ -76,22 +76,22 @@ class CollectionChangesTests: XCTestCase {
 
     func testThatGeneratesInsertionsDeletionsAndMovements() {
         let changes = generateChanges(
-            oldCollection: [Item("a"), Item("b"), Item("c")],
-            newCollection: [Item("d"), Item("c"), Item("a")]
+            oldCollection: [Item(uid: "a"), Item(uid: "b"), Item(uid: "c")],
+            newCollection: [Item(uid: "d"), Item(uid: "c"), Item(uid: "a")]
         )
-        XCTAssertEqual(changes.deletedIndexPaths, [NSIndexPath(forItem: 1, inSection: 0)])
-        XCTAssertEqual(changes.insertedIndexPaths, [NSIndexPath(forItem: 0, inSection: 0)])
+        XCTAssertEqual(changes.deletedIndexPaths, [IndexPath(item: 1, section: 0)])
+        XCTAssertEqual(changes.insertedIndexPaths, [IndexPath(item: 0, section: 0)])
         XCTAssertEqual(Set(changes.movedIndexPaths), [Move(0, to: 2), Move(2, to: 1)])
     }
 
     func testThatAppliesChangesToCollection() {
         // (0, 1, 2, 3, 4) -> (2, 3, new, 4)
 
-        let indexPath0 = NSIndexPath(forItem: 0, inSection: 0)
-        let indexPath1 = NSIndexPath(forItem: 1, inSection: 0)
-        let indexPath2 = NSIndexPath(forItem: 2, inSection: 0)
-        let indexPath3 = NSIndexPath(forItem: 3, inSection: 0)
-        let indexPath4 = NSIndexPath(forItem: 4, inSection: 0)
+        let indexPath0 = IndexPath(item: 0, section: 0)
+        let indexPath1 = IndexPath(item: 1, section: 0)
+        let indexPath2 = IndexPath(item: 2, section: 0)
+        let indexPath3 = IndexPath(item: 3, section: 0)
+        let indexPath4 = IndexPath(item: 4, section: 0)
 
         let collection = [
             indexPath0: 0,
@@ -127,8 +127,8 @@ func Item(uid: String) -> UniqueIdentificable {
     return UniqueIdentificableItem(uid: uid)
 }
 
-func Move(from: Int, to: Int) -> CollectionChangeMove {
-    return CollectionChangeMove(indexPathOld: NSIndexPath(forItem: from, inSection: 0), indexPathNew: NSIndexPath(forItem: to, inSection: 0))
+func Move(_ from: Int, to: Int) -> CollectionChangeMove {
+    return CollectionChangeMove(indexPathOld: IndexPath(item: from, section: 0), indexPathNew: IndexPath(item: to, section: 0))
 }
 
 struct UniqueIdentificableItem: UniqueIdentificable {

Chatto/Tests/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>BNDL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.1.0</string>
+	<string>3.0.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Chatto/Tests/ReadOnlyOrderedDictionaryTests.swift

@@ -29,6 +29,7 @@ class ReadOnlyOrderedDictionaryTests: XCTestCase {
 
     var orderedDictionary: ReadOnlyOrderedDictionary<FakeChatItem>!
     override func setUp() {
+        super.setUp()
         let items = [
             FakeChatItem(uid: "3", type: "type3"),
             FakeChatItem(uid: "1", type: "type1"),
@@ -38,7 +39,7 @@ class ReadOnlyOrderedDictionaryTests: XCTestCase {
     }
 
     func testThat_MapsCorrectly() {
-        XCTAssertEqual(self.orderedDictionary.map { $0.uid}, ["3", "1", "2"])
+        XCTAssertEqual(self.orderedDictionary.map { $0.uid }, ["3", "1", "2"])
     }
 
     func testThat_NumberOfItemsIsCorrect() {

ChattoAdditions.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "ChattoAdditions"
-  s.version      = "2.1.0"
+  s.version      = "3.0.1"
   s.summary      = "UI componentes for Chatto"
   s.description  = <<-DESC
                    Text and photo bubbles

ChattoAdditions/ChattoAdditions.xcodeproj/project.pbxproj

@@ -701,7 +701,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -745,7 +745,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";

ChattoAdditions/Source/AnimationUtils.swift

@@ -23,13 +23,13 @@
 */
 
 public extension CABasicAnimation {
-    class func bma_fadeInAnimationWithDuration(duration: CFTimeInterval) -> CABasicAnimation {
-        let animation = CABasicAnimation.init(keyPath: "opacity")
+    class func bma_fadeInAnimationWithDuration(_ duration: CFTimeInterval) -> CABasicAnimation {
+        let animation = CABasicAnimation(keyPath: "opacity")
         animation.duration = duration
         animation.fromValue = 0
         animation.toValue = 1
         animation.fillMode = kCAFillModeForwards
-        animation.additive = false
+        animation.isAdditive = false
         return animation
     }
 }

ChattoAdditions/Source/Chat Items/BaseMessage/BaseMessageModel.swift

@@ -26,15 +26,15 @@ import Foundation
 import Chatto
 
 public enum MessageStatus {
-    case Failed
-    case Sending
-    case Success
+    case failed
+    case sending
+    case success
 }
 
 public protocol MessageModelProtocol: ChatItemProtocol {
     var senderId: String { get }
     var isIncoming: Bool { get }
-    var date: NSDate { get }
+    var date: Date { get }
     var status: MessageStatus { get }
 }
 
@@ -59,7 +59,7 @@ public extension DecoratedMessageModelProtocol {
         return self.messageModel.isIncoming
     }
 
-    var date: NSDate {
+    var date: Date {
         return self.messageModel.date
     }
 
@@ -68,15 +68,15 @@ public extension DecoratedMessageModelProtocol {
     }
 }
 
-public class MessageModel: MessageModelProtocol {
-    public var uid: String
-    public var senderId: String
-    public var type: String
-    public var isIncoming: Bool
-    public var date: NSDate
-    public var status: MessageStatus
+open class MessageModel: MessageModelProtocol {
+    open var uid: String
+    open var senderId: String
+    open var type: String
+    open var isIncoming: Bool
+    open var date: Date
+    open var status: MessageStatus
 
-    public init(uid: String, senderId: String, type: String, isIncoming: Bool, date: NSDate, status: MessageStatus) {
+    public init(uid: String, senderId: String, type: String, isIncoming: Bool, date: Date, status: MessageStatus) {
         self.uid = uid
         self.senderId = senderId
         self.type = type

ChattoAdditions/Source/Chat Items/BaseMessage/BaseMessagePresenter.swift

@@ -29,24 +29,24 @@ public protocol ViewModelBuilderProtocol {
     associatedtype ModelT: MessageModelProtocol
     associatedtype ViewModelT: MessageViewModelProtocol
     func canCreateViewModel(fromModel model: Any) -> Bool
-    func createViewModel(model: ModelT) -> ViewModelT
+    func createViewModel(_ model: ModelT) -> ViewModelT
 }
 
 public protocol BaseMessageInteractionHandlerProtocol {
     associatedtype ViewModelT
-    func userDidTapOnFailIcon(viewModel viewModel: ViewModelT, failIconView: UIView)
-    func userDidTapOnAvatar(viewModel viewModel: ViewModelT)
-    func userDidTapOnBubble(viewModel viewModel: ViewModelT)
-    func userDidBeginLongPressOnBubble(viewModel viewModel: ViewModelT)
-    func userDidEndLongPressOnBubble(viewModel viewModel: ViewModelT)
+    func userDidTapOnFailIcon(viewModel: ViewModelT, failIconView: UIView)
+    func userDidTapOnAvatar(viewModel: ViewModelT)
+    func userDidTapOnBubble(viewModel: ViewModelT)
+    func userDidBeginLongPressOnBubble(viewModel: ViewModelT)
+    func userDidEndLongPressOnBubble(viewModel: ViewModelT)
 }
 
-public class BaseMessagePresenter<BubbleViewT, ViewModelBuilderT, InteractionHandlerT where
+open class BaseMessagePresenter<BubbleViewT, ViewModelBuilderT, InteractionHandlerT>: BaseChatItemPresenter<BaseMessageCollectionViewCell<BubbleViewT>> where
     ViewModelBuilderT: ViewModelBuilderProtocol,
     ViewModelBuilderT.ViewModelT: MessageViewModelProtocol,
     InteractionHandlerT: BaseMessageInteractionHandlerProtocol,
     InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT,
-    BubbleViewT: UIView, BubbleViewT:MaximumLayoutWidthSpecificable, BubbleViewT: BackgroundSizingQueryable>: BaseChatItemPresenter<BaseMessageCollectionViewCell<BubbleViewT>> {
+    BubbleViewT: UIView, BubbleViewT:MaximumLayoutWidthSpecificable, BubbleViewT: BackgroundSizingQueryable {
     public typealias CellT = BaseMessageCollectionViewCell<BubbleViewT>
     public typealias ModelT = ViewModelBuilderT.ModelT
     public typealias ViewModelT = ViewModelBuilderT.ViewModelT
@@ -74,12 +74,12 @@ public class BaseMessagePresenter<BubbleViewT, ViewModelBuilderT, InteractionHan
         return self.createViewModel()
     }()
 
-    public func createViewModel() -> ViewModelT {
+    open func createViewModel() -> ViewModelT {
         let viewModel = self.viewModelBuilder.createViewModel(self.messageModel)
         return viewModel
     }
 
-    public final override func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
+    public final override func configureCell(_ cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
         guard let cell = cell as? CellT else {
             assert(false, "Invalid cell given to presenter")
             return
@@ -94,11 +94,11 @@ public class BaseMessagePresenter<BubbleViewT, ViewModelBuilderT, InteractionHan
     }
 
     public var decorationAttributes: ChatItemDecorationAttributes!
-    public func configureCell(cell: CellT, decorationAttributes: ChatItemDecorationAttributes, animated: Bool, additionalConfiguration: (() -> Void)?) {
+    open func configureCell(_ cell: CellT, decorationAttributes: ChatItemDecorationAttributes, animated: Bool, additionalConfiguration: (() -> Void)?) {
         cell.performBatchUpdates({ () -> Void in
             self.messageViewModel.showsTail = decorationAttributes.showsTail
-            cell.avatarView.hidden = !decorationAttributes.canShowAvatar
-            cell.bubbleView.userInteractionEnabled = true // just in case something went wrong while showing UIMenuController
+            cell.avatarView.isHidden = !decorationAttributes.canShowAvatar
+            cell.bubbleView.isUserInteractionEnabled = true // just in case something went wrong while showing UIMenuController
             cell.baseStyle = self.cellStyle
             cell.messageViewModel = self.messageViewModel
             cell.onBubbleTapped = { [weak self] (cell) in
@@ -125,74 +125,73 @@ public class BaseMessagePresenter<BubbleViewT, ViewModelBuilderT, InteractionHan
         }, animated: animated, completion: nil)
     }
 
-    public override func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
+    open override func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
         guard let decorationAttributes = decorationAttributes as? ChatItemDecorationAttributes else {
             assert(false, "Expecting decoration attributes")
             return 0
         }
         self.configureCell(self.sizingCell, decorationAttributes: decorationAttributes, animated: false, additionalConfiguration: nil)
-        return self.sizingCell.sizeThatFits(CGSize(width: width, height: CGFloat.max)).height
+        return self.sizingCell.sizeThatFits(CGSize(width: width, height: .greatestFiniteMagnitude)).height
     }
 
-    public override var canCalculateHeightInBackground: Bool {
+    open override var canCalculateHeightInBackground: Bool {
         return self.sizingCell.canCalculateSizeInBackground
     }
 
-
-    public override func cellWillBeShown() {
+    open override func cellWillBeShown() {
         self.messageViewModel.willBeShown()
     }
 
-    public override func cellWasHidden() {
+    open override func cellWasHidden() {
         self.messageViewModel.wasHidden()
     }
 
-    public override func shouldShowMenu() -> Bool {
+    open override func shouldShowMenu() -> Bool {
         guard self.canShowMenu() else { return false }
         guard let cell = self.cell else {
             assert(false, "Investigate -> Fix or remove assert")
             return false
         }
-        cell.bubbleView.userInteractionEnabled = false // This is a hack for UITextView, shouldn't harm to all bubbles
-        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(BaseMessagePresenter.willShowMenu(_:)), name: UIMenuControllerWillShowMenuNotification, object: nil)
+        cell.bubbleView.isUserInteractionEnabled = false // This is a hack for UITextView, shouldn't harm to all bubbles
+        NotificationCenter.default.addObserver(self, selector: #selector(BaseMessagePresenter.willShowMenu(_:)), name: NSNotification.Name.UIMenuControllerWillShowMenu, object: nil)
         return true
     }
 
     @objc
-    func willShowMenu(notification: NSNotification) {
-        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIMenuControllerWillShowMenuNotification, object: nil)
-        guard let cell = self.cell, menuController = notification.object as? UIMenuController else {
+    func willShowMenu(_ notification: Notification) {
+        NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIMenuControllerWillShowMenu, object: nil)
+        guard let cell = self.cell, let menuController = notification.object as? UIMenuController else {
             assert(false, "Investigate -> Fix or remove assert")
             return
         }
-        cell.bubbleView.userInteractionEnabled = true
+        cell.bubbleView.isUserInteractionEnabled = true
         menuController.setMenuVisible(false, animated: false)
-        menuController.setTargetRect(cell.bubbleView.bounds, inView: cell.bubbleView)
+        menuController.setTargetRect(cell.bubbleView.bounds, in: cell.bubbleView)
         menuController.setMenuVisible(true, animated: true)
     }
 
-    public func canShowMenu() -> Bool {
+    open func canShowMenu() -> Bool {
         // Override in subclass
         return false
     }
 
-    public func onCellBubbleTapped() {
+    open func onCellBubbleTapped() {
         self.interactionHandler?.userDidTapOnBubble(viewModel: self.messageViewModel)
     }
 
-    public func onCellBubbleLongPressBegan() {
+    open func onCellBubbleLongPressBegan() {
         self.interactionHandler?.userDidBeginLongPressOnBubble(viewModel: self.messageViewModel)
     }
 
-    public func onCellBubbleLongPressEnded() {
+    open func onCellBubbleLongPressEnded() {
         self.interactionHandler?.userDidEndLongPressOnBubble(viewModel: self.messageViewModel)
     }
 
-    public func onCellAvatarTapped() {
+    open func onCellAvatarTapped() {
         self.interactionHandler?.userDidTapOnAvatar(viewModel: self.messageViewModel)
     }
 
-    public func onCellFailedButtonTapped(failedButtonView: UIView) {
+    open func onCellFailedButtonTapped(_ failedButtonView: UIView) {
         self.interactionHandler?.userDidTapOnFailIcon(viewModel: self.messageViewModel, failIconView: failedButtonView)
     }
 }

ChattoAdditions/Source/Chat Items/BaseMessage/BaseMessageViewModel.swift

@@ -25,20 +25,20 @@
 import Foundation
 
 public enum MessageViewModelStatus {
-    case Success
-    case Sending
-    case Failed
+    case success
+    case sending
+    case failed
 }
 
 public extension MessageStatus {
     public func viewModelStatus() -> MessageViewModelStatus {
         switch self {
-        case .Success:
-            return MessageViewModelStatus.Success
-        case .Failed:
-            return MessageViewModelStatus.Failed
-        case .Sending:
-            return MessageViewModelStatus.Sending
+        case .success:
+            return MessageViewModelStatus.success
+        case .failed:
+            return MessageViewModelStatus.failed
+        case .sending:
+            return MessageViewModelStatus.sending
         }
     }
 }
@@ -97,32 +97,32 @@ extension DecoratedMessageViewModelProtocol {
     }
 }
 
-public class MessageViewModel: MessageViewModelProtocol {
-    public var isIncoming: Bool {
+open class MessageViewModel: MessageViewModelProtocol {
+    open var isIncoming: Bool {
         return self.messageModel.isIncoming
     }
 
-    public var status: MessageViewModelStatus {
+    open var status: MessageViewModelStatus {
         return self.messageModel.status.viewModelStatus()
     }
 
-    public var showsTail: Bool
-    public lazy var date: String = {
-        return self.dateFormatter.stringFromDate(self.messageModel.date)
+    open var showsTail: Bool
+    open lazy var date: String = {
+        return self.dateFormatter.string(from: self.messageModel.date as Date)
     }()
 
-    public let dateFormatter: NSDateFormatter
+    public let dateFormatter: DateFormatter
     public private(set) var messageModel: MessageModelProtocol
 
-    public init(dateFormatter: NSDateFormatter, showsTail: Bool, messageModel: MessageModelProtocol, avatarImage: UIImage?) {
+    public init(dateFormatter: DateFormatter, showsTail: Bool, messageModel: MessageModelProtocol, avatarImage: UIImage?) {
         self.dateFormatter = dateFormatter
         self.showsTail = showsTail
         self.messageModel = messageModel
         self.avatarImage = Observable<UIImage?>(avatarImage)
     }
 
-    public var showsFailedIcon: Bool {
-        return self.status == .Failed
+    open var showsFailedIcon: Bool {
+        return self.status == .failed
     }
 
     public var avatarImage: Observable<UIImage?>
@@ -132,15 +132,15 @@ public class MessageViewModelDefaultBuilder {
 
     public init() {}
 
-    static let dateFormatter: NSDateFormatter = {
-        let formatter = NSDateFormatter()
-        formatter.locale = NSLocale.currentLocale()
-        formatter.dateStyle = .NoStyle
-        formatter.timeStyle = .ShortStyle
+    static let dateFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.locale = Locale.current
+        formatter.dateStyle = .none
+        formatter.timeStyle = .short
         return formatter
     }()
 
-    public func createMessageViewModel(message: MessageModelProtocol) -> MessageViewModelProtocol {
+    public func createMessageViewModel(_ message: MessageModelProtocol) -> MessageViewModelProtocol {
         // Override to use default avatarImage
         return MessageViewModel(dateFormatter: MessageViewModelDefaultBuilder.dateFormatter, showsTail: false, messageModel: message, avatarImage: nil)
     }

ChattoAdditions/Source/Chat Items/BaseMessage/Views/BaseMessageCollectionViewCell.swift

@@ -26,12 +26,12 @@ import UIKit
 import Chatto
 
 public protocol BaseMessageCollectionViewCellStyleProtocol {
-    func avatarSize(viewModel viewModel: MessageViewModelProtocol) -> CGSize // .zero => no avatar
-    func avatarVerticalAlignment(viewModel viewModel: MessageViewModelProtocol) -> VerticalAlignment
+    func avatarSize(viewModel: MessageViewModelProtocol) -> CGSize // .zero => no avatar
+    func avatarVerticalAlignment(viewModel: MessageViewModelProtocol) -> VerticalAlignment
     var failedIcon: UIImage { get }
     var failedIconHighlighted: UIImage { get }
-    func attributedStringForDate(date: String) -> NSAttributedString
-    func layoutConstants(viewModel viewModel: MessageViewModelProtocol) -> BaseMessageCollectionViewCellLayoutConstants
+    func attributedStringForDate(_ date: String) -> NSAttributedString
+    func layoutConstants(viewModel: MessageViewModelProtocol) -> BaseMessageCollectionViewCellLayoutConstants
 }
 
 public struct BaseMessageCollectionViewCellLayoutConstants {
@@ -65,13 +65,13 @@ public struct BaseMessageCollectionViewCellLayoutConstants {
         - Have a BubbleViewType that responds properly to sizeThatFits:
 */
 
-public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:UIView, BubbleViewType:MaximumLayoutWidthSpecificable, BubbleViewType: BackgroundSizingQueryable>: UICollectionViewCell, BackgroundSizingQueryable, AccessoryViewRevealable, UIGestureRecognizerDelegate {
+open class BaseMessageCollectionViewCell<BubbleViewType>: UICollectionViewCell, BackgroundSizingQueryable, AccessoryViewRevealable, UIGestureRecognizerDelegate where BubbleViewType:UIView, BubbleViewType:MaximumLayoutWidthSpecificable, BubbleViewType: BackgroundSizingQueryable {
 
     public var animationDuration: CFTimeInterval = 0.33
-    public var viewContext: ViewContext = .Normal
+    open var viewContext: ViewContext = .normal
 
     public private(set) var isUpdating: Bool = false
-    public func performBatchUpdates(updateClosure: () -> Void, animated: Bool, completion: (() ->())?) {
+    open func performBatchUpdates(_ updateClosure: @escaping () -> Void, animated: Bool, completion: (() ->())?) {
         self.isUpdating = true
         let updateAndRefreshViews = {
             updateClosure()
@@ -82,7 +82,7 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
             }
         }
         if animated {
-            UIView.animateWithDuration(self.animationDuration, animations: updateAndRefreshViews, completion: { (finished) -> Void in
+            UIView.animate(withDuration: self.animationDuration, animations: updateAndRefreshViews, completion: { (finished) -> Void in
                 completion?()
             })
         } else {
@@ -90,7 +90,7 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
         }
     }
 
-    public var messageViewModel: MessageViewModelProtocol! {
+    open var messageViewModel: MessageViewModelProtocol! {
         didSet {
             updateViews()
         }
@@ -106,20 +106,20 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
         }
     }
 
-    override public var selected: Bool {
+    override open var isSelected: Bool {
         didSet {
-            if oldValue != self.selected {
+            if oldValue != self.isSelected {
                 self.updateViews()
             }
         }
     }
 
-    public var canCalculateSizeInBackground: Bool {
+    open var canCalculateSizeInBackground: Bool {
         return self.bubbleView.canCalculateSizeInBackground
     }
 
     public private(set) var bubbleView: BubbleViewType!
-    public func createBubbleView() -> BubbleViewType! {
+    open func createBubbleView() -> BubbleViewType! {
         assert(false, "Override in subclass")
         return nil
     }
@@ -127,7 +127,7 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
     public private(set) var avatarView: UIImageView!
     func createAvatarView() -> UIImageView! {
         let avatarImageView = UIImageView(frame: CGRect.zero)
-        avatarImageView.userInteractionEnabled = true
+        avatarImageView.isUserInteractionEnabled = true
         return avatarImageView
     }
 
@@ -161,44 +161,44 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
         self.avatarView = self.createAvatarView()
         self.avatarView.addGestureRecognizer(self.avatarTapGestureRecognizer)
         self.bubbleView = self.createBubbleView()
-        self.bubbleView.exclusiveTouch = true
+        self.bubbleView.isExclusiveTouch = true
         self.bubbleView.addGestureRecognizer(self.tapGestureRecognizer)
         self.bubbleView.addGestureRecognizer(self.longPressGestureRecognizer)
         self.contentView.addSubview(self.avatarView)
         self.contentView.addSubview(self.bubbleView)
         self.contentView.addSubview(self.failedButton)
-        self.contentView.exclusiveTouch = true
-        self.exclusiveTouch = true
+        self.contentView.isExclusiveTouch = true
+        self.isExclusiveTouch = true
     }
 
-    public func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
-        return self.bubbleView.bounds.contains(touch.locationInView(self.bubbleView))
+    open func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
+        return self.bubbleView.bounds.contains(touch.location(in: self.bubbleView))
     }
 
-    public func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
+    open func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
         return gestureRecognizer === self.longPressGestureRecognizer
     }
 
-    public override func prepareForReuse() {
+    open override func prepareForReuse() {
         super.prepareForReuse()
         self.removeAccessoryView()
     }
 
-    public lazy var failedButton: UIButton = {
-        let button = UIButton(type: .Custom)
-        button.addTarget(self, action: #selector(BaseMessageCollectionViewCell.failedButtonTapped), forControlEvents: .TouchUpInside)
+    public private(set) lazy var failedButton: UIButton = {
+        let button = UIButton(type: .custom)
+        button.addTarget(self, action: #selector(BaseMessageCollectionViewCell.failedButtonTapped), for: .touchUpInside)
         return button
     }()
 
     // MARK: View model binding
 
     final private func updateViews() {
-        if self.viewContext == .Sizing { return }
+        if self.viewContext == .sizing { return }
         if self.isUpdating { return }
-        guard let viewModel = self.messageViewModel, style = self.baseStyle else { return }
+        guard let viewModel = self.messageViewModel, let style = self.baseStyle else { return }
         if viewModel.showsFailedIcon {
-            self.failedButton.setImage(self.failedIcon, forState: .Normal)
-            self.failedButton.setImage(self.failedIconHighlighted, forState: .Highlighted)
+            self.failedButton.setImage(self.failedIcon, for: .normal)
+            self.failedButton.setImage(self.failedIconHighlighted, for: .highlighted)
             self.failedButton.alpha = 1
         } else {
             self.failedButton.alpha = 0
@@ -212,7 +212,7 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
     }
 
     // MARK: layout
-    public override func layoutSubviews() {
+    open override func layoutSubviews() {
         super.layoutSubviews()
 
         let layoutModel = self.calculateLayout(availableWidth: self.contentView.bounds.width)
@@ -225,7 +225,7 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
 
         if self.accessoryTimestampView.superview != nil {
             let layoutConstants = baseStyle.layoutConstants(viewModel: messageViewModel)
-            self.accessoryTimestampView.bounds = CGRect(origin: CGPoint.zero, size: self.accessoryTimestampView.intrinsicContentSize())
+            self.accessoryTimestampView.bounds = CGRect(origin: CGPoint.zero, size: self.accessoryTimestampView.intrinsicContentSize)
             let accessoryViewWidth = self.accessoryTimestampView.bounds.width
             let leftOffsetForContentView = max(0, offsetToRevealAccessoryView)
             let leftOffsetForAccessoryView = min(leftOffsetForContentView, accessoryViewWidth + layoutConstants.horizontalTimestampMargin)
@@ -240,11 +240,11 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
         }
     }
 
-    public override func sizeThatFits(size: CGSize) -> CGSize {
+    open override func sizeThatFits(_ size: CGSize) -> CGSize {
         return self.calculateLayout(availableWidth: size.width).size
     }
 
-    private func calculateLayout(availableWidth availableWidth: CGFloat) -> BaseMessageLayoutModel {
+    private func calculateLayout(availableWidth: CGFloat) -> BaseMessageLayoutModel {
         let layoutConstants = baseStyle.layoutConstants(viewModel: messageViewModel)
         let parameters = BaseMessageLayoutModelParameters(
             containerWidth: availableWidth,
@@ -263,7 +263,6 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
         return layoutModel
     }
 
-
     // MARK: timestamp revealing
 
     lazy var accessoryTimestampView = UILabel()
@@ -276,13 +275,12 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
 
     public var allowAccessoryViewRevealing: Bool = true
 
-    public func preferredOffsetToRevealAccessoryView() -> CGFloat? {
+    open func preferredOffsetToRevealAccessoryView() -> CGFloat? {
         let layoutConstants = baseStyle.layoutConstants(viewModel: messageViewModel)
-        return self.accessoryTimestampView.intrinsicContentSize().width + layoutConstants.horizontalTimestampMargin
+        return self.accessoryTimestampView.intrinsicContentSize.width + layoutConstants.horizontalTimestampMargin
     }
 
-
-    public func revealAccessoryView(withOffset offset: CGFloat, animated: Bool) {
+    open func revealAccessoryView(withOffset offset: CGFloat, animated: Bool) {
         self.offsetToRevealAccessoryView = offset
         if self.accessoryTimestampView.superview == nil {
             if offset > 0 {
@@ -291,13 +289,13 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
             }
 
             if animated {
-                UIView.animateWithDuration(self.animationDuration, animations: { () -> Void in
+                UIView.animate(withDuration: self.animationDuration, animations: { () -> Void in
                     self.layoutIfNeeded()
                 })
             }
         } else {
             if animated {
-                UIView.animateWithDuration(self.animationDuration, animations: { () -> Void in
+                UIView.animate(withDuration: self.animationDuration, animations: { () -> Void in
                     self.layoutIfNeeded()
                     }, completion: { (finished) -> Void in
                         if offset == 0 {
@@ -313,33 +311,33 @@ public class BaseMessageCollectionViewCell<BubbleViewType where BubbleViewType:U
     }
 
     // MARK: User interaction
-    public var onFailedButtonTapped: ((cell: BaseMessageCollectionViewCell) -> Void)?
+    public var onFailedButtonTapped: ((_ cell: BaseMessageCollectionViewCell) -> Void)?
     @objc
     func failedButtonTapped() {
-        self.onFailedButtonTapped?(cell: self)
+        self.onFailedButtonTapped?(self)
     }
 
-    public var onAvatarTapped: ((cell: BaseMessageCollectionViewCell) -> Void)?
+    public var onAvatarTapped: ((_ cell: BaseMessageCollectionViewCell) -> Void)?
     @objc
-    func avatarTapped(tapGestureRecognizer: UITapGestureRecognizer) {
-        self.onAvatarTapped?(cell: self)
+    func avatarTapped(_ tapGestureRecognizer: UITapGestureRecognizer) {
+        self.onAvatarTapped?(self)
     }
 
-    public var onBubbleTapped: ((cell: BaseMessageCollectionViewCell) -> Void)?
+    public var onBubbleTapped: ((_ cell: BaseMessageCollectionViewCell) -> Void)?
     @objc
-    func bubbleTapped(tapGestureRecognizer: UITapGestureRecognizer) {
-        self.onBubbleTapped?(cell: self)
+    func bubbleTapped(_ tapGestureRecognizer: UITapGestureRecognizer) {
+        self.onBubbleTapped?(self)
     }
 
-    public var onBubbleLongPressBegan: ((cell: BaseMessageCollectionViewCell) -> Void)?
-    public var onBubbleLongPressEnded: ((cell: BaseMessageCollectionViewCell) -> Void)?
+    public var onBubbleLongPressBegan: ((_ cell: BaseMessageCollectionViewCell) -> Void)?
+    public var onBubbleLongPressEnded: ((_ cell: BaseMessageCollectionViewCell) -> Void)?
     @objc
-    private func bubbleLongPressed(longPressGestureRecognizer: UILongPressGestureRecognizer) {
+    private func bubbleLongPressed(_ longPressGestureRecognizer: UILongPressGestureRecognizer) {
         switch longPressGestureRecognizer.state {
-        case .Began:
-            self.onBubbleLongPressBegan?(cell: self)
-        case .Ended, .Cancelled:
-            self.onBubbleLongPressEnded?(cell: self)
+        case .began:
+            self.onBubbleLongPressBegan?(self)
+        case .ended, .cancelled:
+            self.onBubbleLongPressEnded?(self)
         default:
             break
         }
@@ -353,8 +351,7 @@ struct BaseMessageLayoutModel {
     private (set) var avatarViewFrame = CGRect.zero
     private (set) var preferredMaxWidthForBubble: CGFloat = 0
 
-
-    mutating func calculateLayout(parameters parameters: BaseMessageLayoutModelParameters) {
+    mutating func calculateLayout(parameters: BaseMessageLayoutModelParameters) {
         let containerWidth = parameters.containerWidth
         let isIncoming = parameters.isIncoming
         let isFailed = parameters.isFailed
@@ -365,13 +362,12 @@ struct BaseMessageLayoutModel {
         let avatarSize = parameters.avatarSize
 
         let preferredWidthForBubble = (containerWidth * parameters.maxContainerWidthPercentageForBubbleView).bma_round()
-        let bubbleSize = bubbleView.sizeThatFits(CGSize(width: preferredWidthForBubble, height: .max))
+        let bubbleSize = bubbleView.sizeThatFits(CGSize(width: preferredWidthForBubble, height: .greatestFiniteMagnitude))
         let containerRect = CGRect(origin: CGPoint.zero, size: CGSize(width: containerWidth, height: bubbleSize.height))
 
-
-        self.bubbleViewFrame = bubbleSize.bma_rect(inContainer: containerRect, xAlignament: .Center, yAlignment: .Center, dx: 0, dy: 0)
-        self.failedViewFrame = failedButtonSize.bma_rect(inContainer: containerRect, xAlignament: .Center, yAlignment: .Center, dx: 0, dy: 0)
-        self.avatarViewFrame = avatarSize.bma_rect(inContainer: containerRect, xAlignament: .Center, yAlignment: parameters.avatarVerticalAlignment, dx: 0, dy: 0)
+        self.bubbleViewFrame = bubbleSize.bma_rect(inContainer: containerRect, xAlignament: .center, yAlignment: .center, dx: 0, dy: 0)
+        self.failedViewFrame = failedButtonSize.bma_rect(inContainer: containerRect, xAlignament: .center, yAlignment: .center, dx: 0, dy: 0)
+        self.avatarViewFrame = avatarSize.bma_rect(inContainer: containerRect, xAlignament: .center, yAlignment: parameters.avatarVerticalAlignment, dx: 0, dy: 0)
 
         // Adjust horizontal positions
 

ChattoAdditions/Source/Chat Items/BaseMessage/Views/BaseMessageCollectionViewCellDefaultStyle.swift

@@ -24,7 +24,7 @@
 
 import UIKit
 
-public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionViewCellStyleProtocol {
+open class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionViewCellStyleProtocol {
 
     typealias Class = BaseMessageCollectionViewCellDefaultStyle
 
@@ -32,8 +32,8 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
         let incoming: () -> UIColor
         let outgoing: () -> UIColor
         public init(
-            @autoclosure(escaping) incoming: () -> UIColor,
-            @autoclosure(escaping) outgoing: () -> UIColor) {
+            incoming: @autoclosure @escaping () -> UIColor,
+            outgoing: @autoclosure @escaping () -> UIColor) {
                 self.incoming = incoming
                 self.outgoing = outgoing
         }
@@ -45,10 +45,10 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
         public let borderOutgoingTail: () -> UIImage
         public let borderOutgoingNoTail: () -> UIImage
         public init(
-            @autoclosure(escaping) borderIncomingTail: () -> UIImage,
-            @autoclosure(escaping) borderIncomingNoTail: () -> UIImage,
-            @autoclosure(escaping) borderOutgoingTail: () -> UIImage,
-            @autoclosure(escaping) borderOutgoingNoTail: () -> UIImage) {
+            borderIncomingTail: @autoclosure @escaping () -> UIImage,
+            borderIncomingNoTail: @autoclosure @escaping () -> UIImage,
+            borderOutgoingTail: @autoclosure @escaping () -> UIImage,
+            borderOutgoingNoTail: @autoclosure @escaping () -> UIImage) {
                 self.borderIncomingTail = borderIncomingTail
                 self.borderIncomingNoTail = borderIncomingNoTail
                 self.borderOutgoingTail = borderOutgoingTail
@@ -60,8 +60,8 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
         let normal: () -> UIImage
         let highlighted: () -> UIImage
         public init(
-            @autoclosure(escaping) normal: () -> UIImage,
-            @autoclosure(escaping) highlighted: () -> UIImage) {
+            normal: @autoclosure @escaping () -> UIImage,
+            highlighted: @autoclosure @escaping () -> UIImage) {
                 self.normal = normal
                 self.highlighted = highlighted
         }
@@ -71,8 +71,8 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
         let font: () -> UIFont
         let color: () -> UIColor
         public init(
-            @autoclosure(escaping) font: () -> UIFont,
-            @autoclosure(escaping) color: () -> UIColor) {
+            font: @autoclosure @escaping () -> UIFont,
+            color: @autoclosure @escaping () -> UIColor) {
                 self.font = font
                 self.color = color
         }
@@ -81,7 +81,7 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
     public struct AvatarStyle {
         let size: CGSize
         let alignment: VerticalAlignment
-        public init(size: CGSize = .zero, alignment: VerticalAlignment = .Bottom) {
+        public init(size: CGSize = .zero, alignment: VerticalAlignment = .bottom) {
             self.size = size
             self.alignment = alignment
         }
@@ -128,11 +128,11 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
         ]
     }()
 
-    public func attributedStringForDate(date: String) -> NSAttributedString {
+    open func attributedStringForDate(_ date: String) -> NSAttributedString {
         return NSAttributedString(string: date, attributes: self.dateStringAttributes)
     }
 
-    public func borderImage(viewModel viewModel: MessageViewModelProtocol) -> UIImage? {
+    open func borderImage(viewModel: MessageViewModelProtocol) -> UIImage? {
         switch (viewModel.isIncoming, viewModel.showsTail) {
         case (true, true):
             return self.borderIncomingTail
@@ -145,15 +145,15 @@ public class BaseMessageCollectionViewCellDefaultStyle: BaseMessageCollectionVie
         }
     }
 
-    public func avatarSize(viewModel viewModel: MessageViewModelProtocol) -> CGSize {
+    open func avatarSize(viewModel: MessageViewModelProtocol) -> CGSize {
         return self.avatarStyle.size
     }
 
-    public func avatarVerticalAlignment(viewModel viewModel: MessageViewModelProtocol) -> VerticalAlignment {
+    open func avatarVerticalAlignment(viewModel: MessageViewModelProtocol) -> VerticalAlignment {
         return self.avatarStyle.alignment
     }
 
-    public func layoutConstants(viewModel viewModel: MessageViewModelProtocol) -> BaseMessageCollectionViewCellLayoutConstants {
+    open func layoutConstants(viewModel: MessageViewModelProtocol) -> BaseMessageCollectionViewCellLayoutConstants {
         return self.layoutConstants
     }
 }
@@ -165,25 +165,25 @@ public extension BaseMessageCollectionViewCellDefaultStyle { // Default values
 
     static public func createDefaultBubbleBorderImages() -> BubbleBorderImages {
         return BubbleBorderImages(
-            borderIncomingTail: UIImage(named: "bubble-incoming-border-tail", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            borderIncomingNoTail: UIImage(named: "bubble-incoming-border", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            borderOutgoingTail: UIImage(named: "bubble-outgoing-border-tail", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            borderOutgoingNoTail: UIImage(named: "bubble-outgoing-border", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!
+            borderIncomingTail: UIImage(named: "bubble-incoming-border-tail", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            borderIncomingNoTail: UIImage(named: "bubble-incoming-border", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            borderOutgoingTail: UIImage(named: "bubble-outgoing-border-tail", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            borderOutgoingNoTail: UIImage(named: "bubble-outgoing-border", in: Bundle(for: Class.self), compatibleWith: nil)!
         )
     }
 
     static public func createDefaultFailedIconImages() -> FailedIconImages {
         let normal = {
-            return UIImage(named: "base-message-failed-icon", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!
+            return UIImage(named: "base-message-failed-icon", in: Bundle(for: Class.self), compatibleWith: nil)!
         }
         return FailedIconImages(
             normal: normal(),
-            highlighted: normal().bma_blendWithColor(UIColor.blackColor().colorWithAlphaComponent(0.10))
+            highlighted: normal().bma_blendWithColor(UIColor.black.withAlphaComponent(0.10))
         )
     }
 
     static public func createDefaultDateTextStyle() -> DateTextStyle {
-        return DateTextStyle(font: UIFont.systemFontOfSize(12), color: UIColor.bma_color(rgb: 0x9aa3ab))
+        return DateTextStyle(font: UIFont.systemFont(ofSize: 12), color: UIColor.bma_color(rgb: 0x9aa3ab))
     }
 
     static public func createDefaultLayoutConstants() -> BaseMessageCollectionViewCellLayoutConstants {

ChattoAdditions/Source/Chat Items/BaseMessage/Views/ViewDefinitions.swift

@@ -25,8 +25,8 @@
 import Foundation
 
 public enum ViewContext {
-    case Normal
-    case Sizing // You may skip some cell updates for faster sizing
+    case normal
+    case sizing // You may skip some cell updates for faster sizing
 }
 
 public protocol MaximumLayoutWidthSpecificable {

ChattoAdditions/Source/Chat Items/PhotoMessages/PhotoMessageModel.swift

@@ -29,7 +29,7 @@ public protocol PhotoMessageModelProtocol: DecoratedMessageModelProtocol {
     var imageSize: CGSize { get }
 }
 
-public class PhotoMessageModel<MessageModelT: MessageModelProtocol>: PhotoMessageModelProtocol {
+open class PhotoMessageModel<MessageModelT: MessageModelProtocol>: PhotoMessageModelProtocol {
     public var messageModel: MessageModelProtocol {
         return self._messageModel
     }

ChattoAdditions/Source/Chat Items/PhotoMessages/PhotoMessagePresenter.swift

@@ -24,12 +24,12 @@
 
 import Foundation
 
-public class PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
+open class PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT>
+: BaseMessagePresenter<PhotoBubbleView, ViewModelBuilderT, InteractionHandlerT> where
     ViewModelBuilderT: ViewModelBuilderProtocol,
     ViewModelBuilderT.ViewModelT: PhotoMessageViewModelProtocol,
     InteractionHandlerT: BaseMessageInteractionHandlerProtocol,
-    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT>
-: BaseMessagePresenter<PhotoBubbleView, ViewModelBuilderT, InteractionHandlerT> {
+    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT {
     public typealias ModelT = ViewModelBuilderT.ModelT
     public typealias ViewModelT = ViewModelBuilderT.ViewModelT
 
@@ -52,15 +52,15 @@ public class PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
             )
     }
 
-    public override class func registerCells(collectionView: UICollectionView) {
-        collectionView.registerClass(PhotoMessageCollectionViewCell.self, forCellWithReuseIdentifier: "photo-message")
+    public final override class func registerCells(_ collectionView: UICollectionView) {
+        collectionView.register(PhotoMessageCollectionViewCell.self, forCellWithReuseIdentifier: "photo-message")
     }
 
-    public override func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
-        return collectionView.dequeueReusableCellWithReuseIdentifier("photo-message", forIndexPath: indexPath)
+    public final override func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
+        return collectionView.dequeueReusableCell(withReuseIdentifier: "photo-message", for: indexPath)
     }
 
-    public override func createViewModel() -> ViewModelBuilderT.ViewModelT {
+    open override func createViewModel() -> ViewModelBuilderT.ViewModelT {
         let viewModel = self.viewModelBuilder.createViewModel(self.messageModel)
         let updateClosure = { [weak self] (old: Any, new: Any) -> () in
             self?.updateCurrentCell()
@@ -84,7 +84,7 @@ public class PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
         return nil
     }
 
-    public override func configureCell(cell: BaseMessageCollectionViewCell<PhotoBubbleView>, decorationAttributes: ChatItemDecorationAttributes, animated: Bool, additionalConfiguration: (() -> Void)?) {
+    open override func configureCell(_ cell: BaseMessageCollectionViewCell<PhotoBubbleView>, decorationAttributes: ChatItemDecorationAttributes, animated: Bool, additionalConfiguration: (() -> Void)?) {
         guard let cell = cell as? PhotoMessageCollectionViewCell else {
             assert(false, "Invalid cell received")
             return
@@ -98,8 +98,8 @@ public class PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
     }
 
     public func updateCurrentCell() {
-        if let cell = self.photoCell, decorationAttributes = self.decorationAttributes {
-            self.configureCell(cell, decorationAttributes: decorationAttributes, animated: self.itemVisibility != .Appearing, additionalConfiguration: nil)
+        if let cell = self.photoCell, let decorationAttributes = self.decorationAttributes {
+            self.configureCell(cell, decorationAttributes: decorationAttributes, animated: self.itemVisibility != .appearing, additionalConfiguration: nil)
         }
     }
 }

ChattoAdditions/Source/Chat Items/PhotoMessages/PhotoMessagePresenterBuilder.swift

@@ -25,12 +25,11 @@
 import Foundation
 import Chatto
 
-public class PhotoMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT where
+open class PhotoMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT>: ChatItemPresenterBuilderProtocol where
     ViewModelBuilderT: ViewModelBuilderProtocol,
     ViewModelBuilderT.ViewModelT: PhotoMessageViewModelProtocol,
     InteractionHandlerT: BaseMessageInteractionHandlerProtocol,
-    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT
->: ChatItemPresenterBuilderProtocol {
+    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT {
     public typealias ModelT = ViewModelBuilderT.ModelT
     public typealias ViewModelT = ViewModelBuilderT.ViewModelT
 
@@ -47,11 +46,11 @@ public class PhotoMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT
     public lazy var photoCellStyle: PhotoMessageCollectionViewCellStyleProtocol = PhotoMessageCollectionViewCellDefaultStyle()
     public lazy var baseCellStyle: BaseMessageCollectionViewCellStyleProtocol = BaseMessageCollectionViewCellDefaultStyle()
 
-    public func canHandleChatItem(chatItem: ChatItemProtocol) -> Bool {
+    open func canHandleChatItem(_ chatItem: ChatItemProtocol) -> Bool {
         return self.viewModelBuilder.canCreateViewModel(fromModel: chatItem)
     }
 
-    public func createPresenterWithChatItem(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
+    open func createPresenterWithChatItem(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
         assert(self.canHandleChatItem(chatItem))
         return PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT>(
             messageModel: chatItem as! ModelT,
@@ -63,7 +62,7 @@ public class PhotoMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT
         )
     }
 
-    public var presenterType: ChatItemPresenterProtocol.Type {
+    open var presenterType: ChatItemPresenterProtocol.Type {
         return PhotoMessagePresenter<ViewModelBuilderT, InteractionHandlerT>.self
     }
 }

ChattoAdditions/Source/Chat Items/PhotoMessages/PhotoMessageViewModel.swift

@@ -25,40 +25,40 @@
 import UIKit
 
 public enum TransferDirection {
-    case Upload
-    case Download
+    case upload
+    case download
 }
 
 public enum TransferStatus {
-    case Idle
-    case Transfering
-    case Failed
-    case Success
+    case idle
+    case transfering
+    case failed
+    case success
 }
 
 public protocol PhotoMessageViewModelProtocol: DecoratedMessageViewModelProtocol {
     var transferDirection: Observable<TransferDirection> { get set }
-    var transferProgress: Observable<Double> { get  set} // in [0,1]
+    var transferProgress: Observable<Double> { get  set } // in [0,1]
     var transferStatus: Observable<TransferStatus> { get set }
     var image: Observable<UIImage?> { get set }
     var imageSize: CGSize { get }
 }
 
-public class PhotoMessageViewModel<PhotoMessageModelT: PhotoMessageModelProtocol>: PhotoMessageViewModelProtocol {
+open class PhotoMessageViewModel<PhotoMessageModelT: PhotoMessageModelProtocol>: PhotoMessageViewModelProtocol {
     public var photoMessage: PhotoMessageModelProtocol {
         return self._photoMessage
     }
     public let _photoMessage: PhotoMessageModelT // Can't make photoMessage: PhotoMessageModelT: https://gist.github.com/diegosanchezr/5a66c7af862e1117b556
-    public var transferStatus: Observable<TransferStatus> = Observable(.Idle)
+    public var transferStatus: Observable<TransferStatus> = Observable(.idle)
     public var transferProgress: Observable<Double> = Observable(0)
-    public var transferDirection: Observable<TransferDirection> = Observable(.Download)
+    public var transferDirection: Observable<TransferDirection> = Observable(.download)
     public var image: Observable<UIImage?>
-    public var imageSize: CGSize {
+    open var imageSize: CGSize {
         return self.photoMessage.imageSize
     }
     public let messageViewModel: MessageViewModelProtocol
-    public var showsFailedIcon: Bool {
-        return self.messageViewModel.showsFailedIcon || self.transferStatus.value == .Failed
+    open var showsFailedIcon: Bool {
+        return self.messageViewModel.showsFailedIcon || self.transferStatus.value == .failed
     }
 
     public init(photoMessage: PhotoMessageModelT, messageViewModel: MessageViewModelProtocol) {
@@ -67,27 +67,27 @@ public class PhotoMessageViewModel<PhotoMessageModelT: PhotoMessageModelProtocol
         self.messageViewModel = messageViewModel
     }
 
-    public func willBeShown() {
+    open func willBeShown() {
         // Need to declare empty. Otherwise subclass code won't execute (as of Xcode 7.2)
     }
 
-    public func wasHidden() {
+    open func wasHidden() {
         // Need to declare empty. Otherwise subclass code won't execute (as of Xcode 7.2)
     }
 }
 
-public class PhotoMessageViewModelDefaultBuilder<PhotoMessageModelT: PhotoMessageModelProtocol>: ViewModelBuilderProtocol {
-    public init() { }
+open class PhotoMessageViewModelDefaultBuilder<PhotoMessageModelT: PhotoMessageModelProtocol>: ViewModelBuilderProtocol {
+    public init() {}
 
     let messageViewModelBuilder = MessageViewModelDefaultBuilder()
 
-    public func createViewModel(model: PhotoMessageModelT) -> PhotoMessageViewModel<PhotoMessageModelT> {
+    open func createViewModel(_ model: PhotoMessageModelT) -> PhotoMessageViewModel<PhotoMessageModelT> {
         let messageViewModel = self.messageViewModelBuilder.createMessageViewModel(model)
         let photoMessageViewModel = PhotoMessageViewModel(photoMessage: model, messageViewModel: messageViewModel)
         return photoMessageViewModel
     }
 
-    public func canCreateViewModel(fromModel model: Any) -> Bool {
+    open func canCreateViewModel(fromModel model: Any) -> Bool {
         return model is PhotoMessageModelT
     }
 }

ChattoAdditions/Source/Chat Items/PhotoMessages/Views/PhotoBubbleView.swift

@@ -25,19 +25,19 @@
 import UIKit
 
 public protocol PhotoBubbleViewStyleProtocol {
-    func maskingImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIImage
-    func borderImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIImage?
-    func placeholderBackgroundImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIImage
-    func placeholderIconImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> (icon: UIImage?, tintColor: UIColor?)
-    func tailWidth(viewModel viewModel: PhotoMessageViewModelProtocol) -> CGFloat
-    func bubbleSize(viewModel viewModel: PhotoMessageViewModelProtocol) -> CGSize
-    func progressIndicatorColor(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIColor
-    func overlayColor(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIColor?
+    func maskingImage(viewModel: PhotoMessageViewModelProtocol) -> UIImage
+    func borderImage(viewModel: PhotoMessageViewModelProtocol) -> UIImage?
+    func placeholderBackgroundImage(viewModel: PhotoMessageViewModelProtocol) -> UIImage
+    func placeholderIconImage(viewModel: PhotoMessageViewModelProtocol) -> (icon: UIImage?, tintColor: UIColor?)
+    func tailWidth(viewModel: PhotoMessageViewModelProtocol) -> CGFloat
+    func bubbleSize(viewModel: PhotoMessageViewModelProtocol) -> CGSize
+    func progressIndicatorColor(viewModel: PhotoMessageViewModelProtocol) -> UIColor
+    func overlayColor(viewModel: PhotoMessageViewModelProtocol) -> UIColor?
 }
 
-public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, BackgroundSizingQueryable {
+open class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, BackgroundSizingQueryable {
 
-    public var viewContext: ViewContext = .Normal
+    public var viewContext: ViewContext = .normal
     public var animationDuration: CFTimeInterval = 0.33
     public var preferredMaxLayoutWidth: CGFloat = 0
 
@@ -60,11 +60,11 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
 
     public private(set) lazy var imageView: UIImageView = {
         let imageView = UIImageView()
-        imageView.autoresizingMask = .None
+        imageView.autoresizingMask = UIViewAutoresizing()
         imageView.clipsToBounds = true
         imageView.autoresizesSubviews = false
-        imageView.autoresizingMask = .None
-        imageView.contentMode = .ScaleAspectFill
+        imageView.autoresizingMask = UIViewAutoresizing()
+        imageView.contentMode = .scaleAspectFill
         imageView.addSubview(self.borderView)
         return imageView
     }()
@@ -78,12 +78,12 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
 
     public private(set) var progressIndicatorView: CircleProgressIndicatorView = {
         let progressView = CircleProgressIndicatorView(size: CGSize(width: 33, height: 33))
-        return progressView
+        return progressView!
     }()
 
     private var placeholderIconView: UIImageView = {
         let imageView = UIImageView()
-        imageView.autoresizingMask = .None
+        imageView.autoresizingMask = UIViewAutoresizing()
         return imageView
     }()
 
@@ -100,7 +100,7 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
     }
 
     public private(set) var isUpdating: Bool = false
-    public func performBatchUpdates(updateClosure: () -> Void, animated: Bool, completion: (() ->())?) {
+    public func performBatchUpdates(_ updateClosure: @escaping () -> Void, animated: Bool, completion: (() ->())?) {
         self.isUpdating = true
         let updateAndRefreshViews = {
             updateClosure()
@@ -111,7 +111,7 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
             }
         }
         if animated {
-            UIView.animateWithDuration(self.animationDuration, animations: updateAndRefreshViews, completion: { (finished) -> Void in
+            UIView.animate(withDuration: self.animationDuration, animations: updateAndRefreshViews, completion: { (finished) -> Void in
                 completion?()
             })
         } else {
@@ -119,10 +119,10 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
         }
     }
 
-    public func updateViews() {
-        if self.viewContext == .Sizing { return }
+    open func updateViews() {
+        if self.viewContext == .sizing { return }
         if isUpdating { return }
-        guard let _ = self.photoMessageViewModel, _ = self.photoMessageStyle else { return }
+        guard let _ = self.photoMessageViewModel, let _ = self.photoMessageStyle else { return }
 
         self.updateProgressIndicator()
         self.updateImages()
@@ -132,23 +132,23 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
     private func updateProgressIndicator() {
         let transferStatus = self.photoMessageViewModel.transferStatus.value
         let transferProgress = self.photoMessageViewModel.transferProgress.value
-        self.progressIndicatorView.hidden = [TransferStatus.Idle, TransferStatus.Success, TransferStatus.Failed].contains(self.photoMessageViewModel.transferStatus.value)
+        self.progressIndicatorView.isHidden = [TransferStatus.idle, TransferStatus.success, TransferStatus.failed].contains(self.photoMessageViewModel.transferStatus.value)
         self.progressIndicatorView.progressLineColor = self.photoMessageStyle.progressIndicatorColor(viewModel: self.photoMessageViewModel)
         self.progressIndicatorView.progressLineWidth = 1
         self.progressIndicatorView.setProgress(CGFloat(transferProgress))
 
         switch transferStatus {
-        case .Idle, .Success, .Failed:
+        case .idle, .success, .failed:
 
             break
-        case .Transfering:
+        case .transfering:
             switch transferProgress {
             case 0:
-                if self.progressIndicatorView.progressStatus != .Starting { self.progressIndicatorView.progressStatus = .Starting }
+                if self.progressIndicatorView.progressStatus != .starting { self.progressIndicatorView.progressStatus = .starting }
             case 1:
-                if self.progressIndicatorView.progressStatus != .Completed { self.progressIndicatorView.progressStatus = .Completed }
+                if self.progressIndicatorView.progressStatus != .completed { self.progressIndicatorView.progressStatus = .completed }
             default:
-                if self.progressIndicatorView.progressStatus != .InProgress { self.progressIndicatorView.progressStatus = .InProgress }
+                if self.progressIndicatorView.progressStatus != .inProgress { self.progressIndicatorView.progressStatus = .inProgress }
             }
         }
     }
@@ -156,13 +156,13 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
     private func updateImages() {
         if let image = self.photoMessageViewModel.image.value {
             self.imageView.image = image
-            self.placeholderIconView.hidden = true
+            self.placeholderIconView.isHidden = true
         } else {
             self.imageView.image = self.photoMessageStyle.placeholderBackgroundImage(viewModel: self.photoMessageViewModel)
             let (icon, tintColor) = photoMessageStyle.placeholderIconImage(viewModel: self.photoMessageViewModel)
             self.placeholderIconView.image = icon
             self.placeholderIconView.tintColor = tintColor
-            self.placeholderIconView.hidden = false
+            self.placeholderIconView.isHidden = false
         }
 
         if let overlayColor = self.photoMessageStyle.overlayColor(viewModel: self.photoMessageViewModel) {
@@ -178,14 +178,13 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
         self.imageView.layer.mask = UIImageView(image: self.photoMessageStyle.maskingImage(viewModel: self.photoMessageViewModel)).layer
     }
 
-
     // MARK: Layout
 
-    public override func sizeThatFits(size: CGSize) -> CGSize {
+    open override func sizeThatFits(_ size: CGSize) -> CGSize {
         return self.calculateTextBubbleLayout(maximumWidth: size.width).size
     }
 
-    public override func layoutSubviews() {
+    open override func layoutSubviews() {
         super.layoutSubviews()
         let layout = self.calculateTextBubbleLayout(maximumWidth: self.preferredMaxLayoutWidth)
         self.progressIndicatorView.center = layout.visualCenter
@@ -197,20 +196,19 @@ public class PhotoBubbleView: UIView, MaximumLayoutWidthSpecificable, Background
         self.borderView.bma_rect = self.imageView.bounds
     }
 
-    private func calculateTextBubbleLayout(maximumWidth maximumWidth: CGFloat) -> PhotoBubbleLayoutModel {
+    private func calculateTextBubbleLayout(maximumWidth: CGFloat) -> PhotoBubbleLayoutModel {
         let layoutContext = PhotoBubbleLayoutModel.LayoutContext(photoMessageViewModel: self.photoMessageViewModel, style: self.photoMessageStyle, containerWidth: maximumWidth)
         let layoutModel = PhotoBubbleLayoutModel(layoutContext: layoutContext)
         layoutModel.calculateLayout()
         return layoutModel
     }
 
-    public var canCalculateSizeInBackground: Bool {
+    open var canCalculateSizeInBackground: Bool {
         return true
     }
 
 }
 
-
 private class PhotoBubbleLayoutModel {
     var photoFrame: CGRect = CGRect.zero
     var visualCenter: CGPoint = CGPoint.zero // Because image is cropped a few points on the side of the tail, the apparent center will be a bit shifted

ChattoAdditions/Source/Chat Items/PhotoMessages/Views/PhotoMessageCollectionViewCell.swift

@@ -30,14 +30,10 @@ public final class PhotoMessageCollectionViewCell: BaseMessageCollectionViewCell
 
     static func sizingCell() -> PhotoMessageCollectionViewCell {
         let cell = PhotoMessageCollectionViewCell(frame: CGRect.zero)
-        cell.viewContext = .Sizing
+        cell.viewContext = .sizing
         return cell
     }
 
-    public override init(frame: CGRect) {
-        super.init(frame: frame)
-    }
-
     public override func createBubbleView() -> PhotoBubbleView {
         return PhotoBubbleView()
     }
@@ -61,7 +57,7 @@ public final class PhotoMessageCollectionViewCell: BaseMessageCollectionViewCell
         }
     }
 
-    public override func performBatchUpdates(updateClosure: () -> Void, animated: Bool, completion: (() -> Void)?) {
+    public override func performBatchUpdates(_ updateClosure: @escaping () -> Void, animated: Bool, completion: (() -> Void)?) {
         super.performBatchUpdates({ () -> Void in
             self.bubbleView.performBatchUpdates(updateClosure, animated: false, completion: nil)
         }, animated: animated, completion: completion)

ChattoAdditions/Source/Chat Items/PhotoMessages/Views/PhotoMessageCollectionViewCellDefaultStyle.swift

@@ -24,7 +24,7 @@
 
 import UIKit
 
-public class PhotoMessageCollectionViewCellDefaultStyle: PhotoMessageCollectionViewCellStyleProtocol {
+open class PhotoMessageCollectionViewCellDefaultStyle: PhotoMessageCollectionViewCellStyleProtocol {
     typealias Class = PhotoMessageCollectionViewCellDefaultStyle
 
     public struct BubbleMasks {
@@ -34,10 +34,10 @@ public class PhotoMessageCollectionViewCellDefaultStyle: PhotoMessageCollectionV
         public let outgoingNoTail: () -> UIImage
         public let tailWidth: CGFloat
         public init(
-            @autoclosure(escaping) incomingTail: () -> UIImage,
-            @autoclosure(escaping) incomingNoTail: () -> UIImage,
-            @autoclosure(escaping) outgoingTail: () -> UIImage,
-            @autoclosure(escaping) outgoingNoTail: () -> UIImage,
+            incomingTail: @autoclosure @escaping () -> UIImage,
+            incomingNoTail: @autoclosure @escaping () -> UIImage,
+            outgoingTail: @autoclosure @escaping () -> UIImage,
+            outgoingNoTail: @autoclosure @escaping () -> UIImage,
             tailWidth: CGFloat) {
                 self.incomingTail = incomingTail
                 self.incomingNoTail = incomingNoTail
@@ -48,12 +48,12 @@ public class PhotoMessageCollectionViewCellDefaultStyle: PhotoMessageCollectionV
     }
 
     public struct Sizes {
-        public let aspectRatioIntervalForSquaredSize: ClosedInterval<CGFloat>
+        public let aspectRatioIntervalForSquaredSize: ClosedRange<CGFloat>
         public let photoSizeLandscape: CGSize
         public let photoSizePortrait: CGSize
         public let photoSizeSquare: CGSize
         public init(
-            aspectRatioIntervalForSquaredSize: ClosedInterval<CGFloat>,
+            aspectRatioIntervalForSquaredSize: ClosedRange<CGFloat>,
             photoSizeLandscape: CGSize,
             photoSizePortrait: CGSize,
             photoSizeSquare: CGSize) {
@@ -113,10 +113,10 @@ public class PhotoMessageCollectionViewCellDefaultStyle: PhotoMessageCollectionV
     }()
 
     lazy private var placeholderIcon: UIImage = {
-        return UIImage(named: "photo-bubble-placeholder-icon", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!
+        return UIImage(named: "photo-bubble-placeholder-icon", in: Bundle(for: Class.self), compatibleWith: nil)!
     }()
 
-    public func maskingImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIImage {
+    open func maskingImage(viewModel: PhotoMessageViewModelProtocol) -> UIImage {
         switch (viewModel.isIncoming, viewModel.showsTail) {
         case (true, true):
             return self.maskImageIncomingTail
@@ -129,44 +129,44 @@ public class PhotoMessageCollectionViewCellDefaultStyle: PhotoMessageCollectionV
         }
     }
 
-    public func borderImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIImage? {
+    open func borderImage(viewModel: PhotoMessageViewModelProtocol) -> UIImage? {
         return self.baseStyle.borderImage(viewModel: viewModel)
     }
 
-    public func placeholderBackgroundImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIImage {
+    open func placeholderBackgroundImage(viewModel: PhotoMessageViewModelProtocol) -> UIImage {
         return viewModel.isIncoming ? self.placeholderBackgroundIncoming : self.placeholderBackgroundOutgoing
     }
 
-    public func placeholderIconImage(viewModel viewModel: PhotoMessageViewModelProtocol) -> (icon: UIImage?, tintColor: UIColor?) {
-        if viewModel.image.value == nil && viewModel.transferStatus.value == .Failed {
+    open func placeholderIconImage(viewModel: PhotoMessageViewModelProtocol) -> (icon: UIImage?, tintColor: UIColor?) {
+        if viewModel.image.value == nil && viewModel.transferStatus.value == .failed {
             let tintColor = viewModel.isIncoming ? self.colors.placeholderIconTintIncoming : self.colors.placeholderIconTintOutgoing
             return (self.placeholderIcon, tintColor)
         }
         return (nil, nil)
     }
 
-    public func tailWidth(viewModel viewModel: PhotoMessageViewModelProtocol) -> CGFloat {
+    open func tailWidth(viewModel: PhotoMessageViewModelProtocol) -> CGFloat {
         return self.bubbleMasks.tailWidth
     }
 
-    public func bubbleSize(viewModel viewModel: PhotoMessageViewModelProtocol) -> CGSize {
+    open func bubbleSize(viewModel: PhotoMessageViewModelProtocol) -> CGSize {
         let aspectRatio = viewModel.imageSize.height > 0 ? viewModel.imageSize.width / viewModel.imageSize.height : 0
 
         if aspectRatio == 0 || self.sizes.aspectRatioIntervalForSquaredSize.contains(aspectRatio) {
             return self.sizes.photoSizeSquare
-        } else if aspectRatio < self.sizes.aspectRatioIntervalForSquaredSize.start {
+        } else if aspectRatio < self.sizes.aspectRatioIntervalForSquaredSize.lowerBound {
             return self.sizes.photoSizePortrait
         } else {
             return self.sizes.photoSizeLandscape
         }
     }
 
-    public func progressIndicatorColor(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIColor {
+    open func progressIndicatorColor(viewModel: PhotoMessageViewModelProtocol) -> UIColor {
         return viewModel.isIncoming ? self.colors.progressIndicatorColorIncoming : self.colors.progressIndicatorColorOutgoing
     }
 
-    public func overlayColor(viewModel viewModel: PhotoMessageViewModelProtocol) -> UIColor? {
-        let showsOverlay = viewModel.image.value != nil && (viewModel.transferStatus.value == .Transfering || viewModel.status != MessageViewModelStatus.Success)
+    open func overlayColor(viewModel: PhotoMessageViewModelProtocol) -> UIColor? {
+        let showsOverlay = viewModel.image.value != nil && (viewModel.transferStatus.value == .transfering || viewModel.status != MessageViewModelStatus.success)
         return showsOverlay ? self.colors.overlayColor : nil
     }
 
@@ -176,10 +176,10 @@ public extension PhotoMessageCollectionViewCellDefaultStyle { // Default values
 
     static public func createDefaultBubbleMasks() -> BubbleMasks {
         return BubbleMasks(
-            incomingTail: UIImage(named: "bubble-incoming-tail", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            incomingNoTail: UIImage(named: "bubble-incoming", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            outgoingTail: UIImage(named: "bubble-outgoing-tail", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            outgoingNoTail: UIImage(named: "bubble-outgoing", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
+            incomingTail: UIImage(named: "bubble-incoming-tail", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            incomingNoTail: UIImage(named: "bubble-incoming", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            outgoingTail: UIImage(named: "bubble-outgoing-tail", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            outgoingNoTail: UIImage(named: "bubble-outgoing", in: Bundle(for: Class.self), compatibleWith: nil)!,
             tailWidth: 6
         )
     }
@@ -198,8 +198,8 @@ public extension PhotoMessageCollectionViewCellDefaultStyle { // Default values
             placeholderIconTintIncoming: UIColor.bma_color(rgb: 0xced6dc),
             placeholderIconTintOutgoing: UIColor.bma_color(rgb: 0x508dfc),
             progressIndicatorColorIncoming: UIColor.bma_color(rgb: 0x98a3ab),
-            progressIndicatorColorOutgoing: UIColor.whiteColor(),
-            overlayColor: UIColor.blackColor().colorWithAlphaComponent(0.70)
+            progressIndicatorColorOutgoing: UIColor.white,
+            overlayColor: UIColor.black.withAlphaComponent(0.70)
         )
     }
 }

ChattoAdditions/Source/Chat Items/TextMessages/TextMessageModel.swift

@@ -28,7 +28,7 @@ public protocol TextMessageModelProtocol: DecoratedMessageModelProtocol {
     var text: String { get }
 }
 
-public class TextMessageModel<MessageModelT: MessageModelProtocol>: TextMessageModelProtocol {
+open class TextMessageModel<MessageModelT: MessageModelProtocol>: TextMessageModelProtocol {
     public var messageModel: MessageModelProtocol {
         return self._messageModel
     }

ChattoAdditions/Source/Chat Items/TextMessages/TextMessagePresenter.swift

@@ -24,12 +24,12 @@
 
 import UIKit
 
-public class TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
+open class TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT>
+: BaseMessagePresenter<TextBubbleView, ViewModelBuilderT, InteractionHandlerT> where
     ViewModelBuilderT: ViewModelBuilderProtocol,
     ViewModelBuilderT.ViewModelT: TextMessageViewModelProtocol,
     InteractionHandlerT: BaseMessageInteractionHandlerProtocol,
-    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT>
-: BaseMessagePresenter<TextBubbleView, ViewModelBuilderT, InteractionHandlerT> {
+    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT {
     public typealias ModelT = ViewModelBuilderT.ModelT
     public typealias ViewModelT = ViewModelBuilderT.ViewModelT
 
@@ -40,7 +40,7 @@ public class TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
         sizingCell: TextMessageCollectionViewCell,
         baseCellStyle: BaseMessageCollectionViewCellStyleProtocol,
         textCellStyle: TextMessageCollectionViewCellStyleProtocol,
-        layoutCache: NSCache) {
+        layoutCache: NSCache<AnyObject, AnyObject>) {
             self.layoutCache = layoutCache
             self.textCellStyle = textCellStyle
             super.init(
@@ -52,20 +52,20 @@ public class TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
             )
     }
 
-    let layoutCache: NSCache
+    let layoutCache: NSCache<AnyObject, AnyObject>
     let textCellStyle: TextMessageCollectionViewCellStyleProtocol
 
-    public override class func registerCells(collectionView: UICollectionView) {
-        collectionView.registerClass(TextMessageCollectionViewCell.self, forCellWithReuseIdentifier: "text-message-incoming")
-        collectionView.registerClass(TextMessageCollectionViewCell.self, forCellWithReuseIdentifier: "text-message-outcoming")
+    public final override class func registerCells(_ collectionView: UICollectionView) {
+        collectionView.register(TextMessageCollectionViewCell.self, forCellWithReuseIdentifier: "text-message-incoming")
+        collectionView.register(TextMessageCollectionViewCell.self, forCellWithReuseIdentifier: "text-message-outcoming")
     }
 
-    public override func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
+    public final override func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
         let identifier = self.messageViewModel.isIncoming ? "text-message-incoming" : "text-message-outcoming"
-        return collectionView.dequeueReusableCellWithReuseIdentifier(identifier, forIndexPath: indexPath)
+        return collectionView.dequeueReusableCell(withReuseIdentifier: identifier, for: indexPath)
     }
 
-    public override func createViewModel() -> ViewModelBuilderT.ViewModelT {
+    open override func createViewModel() -> ViewModelBuilderT.ViewModelT {
         let viewModel = self.viewModelBuilder.createViewModel(self.messageModel)
         let updateClosure = { [weak self] (old: Any, new: Any) -> () in
             self?.updateCurrentCell()
@@ -85,7 +85,7 @@ public class TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
         return nil
     }
 
-    public override func configureCell(cell: BaseMessageCollectionViewCell<TextBubbleView>, decorationAttributes: ChatItemDecorationAttributes, animated: Bool, additionalConfiguration: (() -> Void)?) {
+    open override func configureCell(_ cell: BaseMessageCollectionViewCell<TextBubbleView>, decorationAttributes: ChatItemDecorationAttributes, animated: Bool, additionalConfiguration: (() -> Void)?) {
         guard let cell = cell as? TextMessageCollectionViewCell else {
             assert(false, "Invalid cell received")
             return
@@ -100,32 +100,24 @@ public class TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT where
     }
 
     public func updateCurrentCell() {
-        if let cell = self.textCell, decorationAttributes = self.decorationAttributes {
-            self.configureCell(cell, decorationAttributes: decorationAttributes, animated: self.itemVisibility != .Appearing, additionalConfiguration: nil)
+        if let cell = self.textCell, let decorationAttributes = self.decorationAttributes {
+            self.configureCell(cell, decorationAttributes: decorationAttributes, animated: self.itemVisibility != .appearing, additionalConfiguration: nil)
         }
     }
 
-    public override func canShowMenu() -> Bool {
+    open override func canShowMenu() -> Bool {
         return true
     }
 
-    public override func canPerformMenuControllerAction(action: Selector) -> Bool {
-        #if swift(>=2.3)
-            let selector = #selector(UIResponderStandardEditActions.copy(_:))
-        #else
-            let selector = #selector(NSObject.copy(_:))
-        #endif
+    open override func canPerformMenuControllerAction(_ action: Selector) -> Bool {
+        let selector = #selector(UIResponderStandardEditActions.copy(_:))
         return action == selector
     }
 
-    public override func performMenuControllerAction(action: Selector) {
-        #if swift(>=2.3)
-            let selector = #selector(UIResponderStandardEditActions.copy(_:))
-        #else
-            let selector = #selector(NSObject.copy(_:))
-        #endif
+    open override func performMenuControllerAction(_ action: Selector) {
+        let selector = #selector(UIResponderStandardEditActions.copy(_:))
         if action == selector {
-            UIPasteboard.generalPasteboard().string = self.messageViewModel.text
+            UIPasteboard.general.string = self.messageViewModel.text
         } else {
             assert(false, "Unexpected action")
         }

ChattoAdditions/Source/Chat Items/TextMessages/TextMessagePresenterBuilder.swift

@@ -25,12 +25,12 @@
 import Foundation
 import Chatto
 
-public class TextMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT where
+open class TextMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT>
+: ChatItemPresenterBuilderProtocol where
     ViewModelBuilderT: ViewModelBuilderProtocol,
     ViewModelBuilderT.ViewModelT: TextMessageViewModelProtocol,
     InteractionHandlerT: BaseMessageInteractionHandlerProtocol,
-    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT>
-: ChatItemPresenterBuilderProtocol {
+    InteractionHandlerT.ViewModelT == ViewModelBuilderT.ViewModelT {
     typealias ViewModelT = ViewModelBuilderT.ViewModelT
     typealias ModelT = ViewModelBuilderT.ModelT
 
@@ -43,14 +43,14 @@ public class TextMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT
 
     let viewModelBuilder: ViewModelBuilderT
     let interactionHandler: InteractionHandlerT?
-    let layoutCache = NSCache()
+    let layoutCache = NSCache<AnyObject, AnyObject>()
 
     lazy var sizingCell: TextMessageCollectionViewCell = {
         var cell: TextMessageCollectionViewCell? = nil
-        if NSThread.isMainThread() {
+        if Thread.isMainThread {
             cell = TextMessageCollectionViewCell.sizingCell()
         } else {
-            dispatch_sync(dispatch_get_main_queue(), {
+            DispatchQueue.main.sync(execute: {
                 cell =  TextMessageCollectionViewCell.sizingCell()
             })
         }
@@ -61,11 +61,11 @@ public class TextMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT
     public lazy var textCellStyle: TextMessageCollectionViewCellStyleProtocol = TextMessageCollectionViewCellDefaultStyle()
     public lazy var baseMessageStyle: BaseMessageCollectionViewCellStyleProtocol = BaseMessageCollectionViewCellDefaultStyle()
 
-    public func canHandleChatItem(chatItem: ChatItemProtocol) -> Bool {
+    open func canHandleChatItem(_ chatItem: ChatItemProtocol) -> Bool {
         return self.viewModelBuilder.canCreateViewModel(fromModel: chatItem)
     }
 
-    public func createPresenterWithChatItem(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
+    open func createPresenterWithChatItem(_ chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol {
         assert(self.canHandleChatItem(chatItem))
         return TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT>(
             messageModel: chatItem as! ModelT,
@@ -78,7 +78,7 @@ public class TextMessagePresenterBuilder<ViewModelBuilderT, InteractionHandlerT
         )
     }
 
-    public var presenterType: ChatItemPresenterProtocol.Type {
+    open var presenterType: ChatItemPresenterProtocol.Type {
         return TextMessagePresenter<ViewModelBuilderT, InteractionHandlerT>.self
     }
 }

ChattoAdditions/Source/Chat Items/TextMessages/TextMessageViewModel.swift

@@ -28,7 +28,7 @@ public protocol TextMessageViewModelProtocol: DecoratedMessageViewModelProtocol
     var text: String { get }
 }
 
-public class TextMessageViewModel<TextMessageModelT: TextMessageModelProtocol>: TextMessageViewModelProtocol {
+open class TextMessageViewModel<TextMessageModelT: TextMessageModelProtocol>: TextMessageViewModelProtocol {
     public var text: String {
         return self.textMessage.text
     }
@@ -40,27 +40,27 @@ public class TextMessageViewModel<TextMessageModelT: TextMessageModelProtocol>:
         self.messageViewModel = messageViewModel
     }
 
-    public func willBeShown() {
+    open func willBeShown() {
         // Need to declare empty. Otherwise subclass code won't execute (as of Xcode 7.2)
     }
 
-    public func wasHidden() {
+    open func wasHidden() {
         // Need to declare empty. Otherwise subclass code won't execute (as of Xcode 7.2)
     }
 }
 
-public class TextMessageViewModelDefaultBuilder<TextMessageModelT: TextMessageModelProtocol>: ViewModelBuilderProtocol {
-    public init() { }
+open class TextMessageViewModelDefaultBuilder<TextMessageModelT: TextMessageModelProtocol>: ViewModelBuilderProtocol {
+    public init() {}
 
     let messageViewModelBuilder = MessageViewModelDefaultBuilder()
 
-    public func createViewModel(textMessage: TextMessageModelT) -> TextMessageViewModel<TextMessageModelT> {
+    open func createViewModel(_ textMessage: TextMessageModelT) -> TextMessageViewModel<TextMessageModelT> {
         let messageViewModel = self.messageViewModelBuilder.createMessageViewModel(textMessage)
         let textMessageViewModel = TextMessageViewModel(textMessage: textMessage, messageViewModel: messageViewModel)
         return textMessageViewModel
     }
 
-    public func canCreateViewModel(fromModel model: Any) -> Bool {
+    open func canCreateViewModel(fromModel model: Any) -> Bool {
         return model is TextMessageModelT
     }
 }

ChattoAdditions/Source/Chat Items/TextMessages/Views/TextBubbleView.swift

@@ -25,25 +25,25 @@
 import UIKit
 
 public protocol TextBubbleViewStyleProtocol {
-    func bubbleImage(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage
-    func bubbleImageBorder(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage?
-    func textFont(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIFont
-    func textColor(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIColor
-    func textInsets(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIEdgeInsets
+    func bubbleImage(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage
+    func bubbleImageBorder(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage?
+    func textFont(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIFont
+    func textColor(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIColor
+    func textInsets(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIEdgeInsets
 }
 
 public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, BackgroundSizingQueryable {
 
     public var preferredMaxLayoutWidth: CGFloat = 0
     public var animationDuration: CFTimeInterval = 0.33
-    public var viewContext: ViewContext = .Normal {
+    public var viewContext: ViewContext = .normal {
         didSet {
-            if self.viewContext == .Sizing {
-                self.textView.dataDetectorTypes = .None
-                self.textView.selectable = false
+            if self.viewContext == .sizing {
+                self.textView.dataDetectorTypes = UIDataDetectorTypes()
+                self.textView.isSelectable = false
             } else {
-                self.textView.dataDetectorTypes = .All
-                self.textView.selectable = true
+                self.textView.dataDetectorTypes = .all
+                self.textView.isSelectable = true
             }
         }
     }
@@ -93,25 +93,25 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
     private var textView: UITextView = {
         let textView = ChatMessageTextView()
         UIView.performWithoutAnimation({ () -> Void in // fixes iOS 8 blinking when cell appears
-            textView.backgroundColor = UIColor.clearColor()
+            textView.backgroundColor = UIColor.clear
         })
-        textView.editable = false
-        textView.selectable = true
-        textView.dataDetectorTypes = .All
+        textView.isEditable = false
+        textView.isSelectable = true
+        textView.dataDetectorTypes = .all
         textView.scrollsToTop = false
-        textView.scrollEnabled = false
+        textView.isScrollEnabled = false
         textView.bounces = false
         textView.bouncesZoom = false
         textView.showsHorizontalScrollIndicator = false
         textView.showsVerticalScrollIndicator = false
         textView.layoutManager.allowsNonContiguousLayout = true
-        textView.exclusiveTouch = true
+        textView.isExclusiveTouch = true
         textView.textContainer.lineFragmentPadding = 0
         return textView
     }()
 
     public private(set) var isUpdating: Bool = false
-    public func performBatchUpdates(updateClosure: () -> Void, animated: Bool, completion: (() -> Void)?) {
+    public func performBatchUpdates(_ updateClosure: @escaping () -> Void, animated: Bool, completion: (() -> Void)?) {
         self.isUpdating = true
         let updateAndRefreshViews = {
             updateClosure()
@@ -122,7 +122,7 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
             }
         }
         if animated {
-            UIView.animateWithDuration(self.animationDuration, animations: updateAndRefreshViews, completion: { (finished) -> Void in
+            UIView.animate(withDuration: self.animationDuration, animations: updateAndRefreshViews, completion: { (finished) -> Void in
                 completion?()
             })
         } else {
@@ -131,19 +131,19 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
     }
 
     private func updateViews() {
-        if self.viewContext == .Sizing { return }
+        if self.viewContext == .sizing { return }
         if isUpdating { return }
         guard let style = self.style else { return }
 
         self.updateTextView()
         let bubbleImage = style.bubbleImage(viewModel: self.textMessageViewModel, isSelected: self.selected)
         let borderImage = style.bubbleImageBorder(viewModel: self.textMessageViewModel, isSelected: self.selected)
-        if self.bubbleImageView.image != bubbleImage { self.bubbleImageView.image = bubbleImage}
+        if self.bubbleImageView.image != bubbleImage { self.bubbleImageView.image = bubbleImage }
         if self.borderImageView.image != borderImage { self.borderImageView.image = borderImage }
     }
 
     private func updateTextView() {
-        guard let style = self.style, viewModel = self.textMessageViewModel else { return }
+        guard let style = self.style, let viewModel = self.textMessageViewModel else { return }
 
         let font = style.textFont(viewModel: viewModel, isSelected: self.selected)
         let textColor = style.textColor(viewModel: viewModel, isSelected: self.selected)
@@ -159,7 +159,7 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
             self.textView.textColor = textColor
             self.textView.linkTextAttributes = [
                 NSForegroundColorAttributeName: textColor,
-                NSUnderlineStyleAttributeName : NSUnderlineStyle.StyleSingle.rawValue
+                NSUnderlineStyleAttributeName : NSUnderlineStyle.styleSingle.rawValue
             ]
             needsToUpdateText = true
         }
@@ -176,7 +176,7 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
         return self.style.bubbleImage(viewModel: self.textMessageViewModel, isSelected: self.selected)
     }
 
-    public override func sizeThatFits(size: CGSize) -> CGSize {
+    public override func sizeThatFits(_ size: CGSize) -> CGSize {
         return self.calculateTextBubbleLayout(preferredMaxLayoutWidth: size.width).size
     }
 
@@ -189,8 +189,8 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
         self.borderImageView.bma_rect = self.bubbleImageView.bounds
     }
 
-    public var layoutCache: NSCache!
-    private func calculateTextBubbleLayout(preferredMaxLayoutWidth preferredMaxLayoutWidth: CGFloat) -> TextBubbleLayoutModel {
+    public var layoutCache: NSCache<AnyObject, AnyObject>!
+    private func calculateTextBubbleLayout(preferredMaxLayoutWidth: CGFloat) -> TextBubbleLayoutModel {
         let layoutContext = TextBubbleLayoutModel.LayoutContext(
             text: self.textMessageViewModel.text,
             font: self.style.textFont(viewModel: self.textMessageViewModel, isSelected: self.selected),
@@ -198,14 +198,14 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
             preferredMaxLayoutWidth: preferredMaxLayoutWidth
         )
 
-        if let layoutModel = self.layoutCache.objectForKey(layoutContext.hashValue) as? TextBubbleLayoutModel where layoutModel.layoutContext == layoutContext {
+        if let layoutModel = self.layoutCache.object(forKey: layoutContext.hashValue as AnyObject) as? TextBubbleLayoutModel, layoutModel.layoutContext == layoutContext {
             return layoutModel
         }
 
         let layoutModel = TextBubbleLayoutModel(layoutContext: layoutContext)
         layoutModel.calculateLayout()
 
-        self.layoutCache.setObject(layoutModel, forKey: layoutContext.hashValue)
+        self.layoutCache.setObject(layoutModel, forKey: layoutContext.hashValue as AnyObject)
         return layoutModel
     }
 
@@ -214,7 +214,6 @@ public final class TextBubbleView: UIView, MaximumLayoutWidthSpecificable, Backg
     }
 }
 
-
 private final class TextBubbleLayoutModel {
     let layoutContext: LayoutContext
     var textFrame: CGRect = CGRect.zero
@@ -236,6 +235,12 @@ private final class TextBubbleLayoutModel {
                 return self.text.hashValue ^ self.textInsets.bma_hashValue ^ self.preferredMaxLayoutWidth.hashValue ^ self.font.hashValue
             }
         }
+
+        static func == (lhs: TextBubbleLayoutModel.LayoutContext, rhs: TextBubbleLayoutModel.LayoutContext) -> Bool {
+            let lhsValues = (lhs.text, lhs.textInsets, lhs.font, lhs.preferredMaxLayoutWidth)
+            let rhsValues = (rhs.text, rhs.textInsets, rhs.font, rhs.preferredMaxLayoutWidth)
+            return lhsValues == rhsValues
+        }
     }
 
     func calculateLayout() {
@@ -248,9 +253,9 @@ private final class TextBubbleLayoutModel {
         self.size = bubbleSize
     }
 
-    private func textSizeThatFitsWidth(width: CGFloat) -> CGSize {
+    private func textSizeThatFitsWidth(_ width: CGFloat) -> CGSize {
         let textContainer: NSTextContainer = {
-            let size = CGSize(width: width, height: .max)
+            let size = CGSize(width: width, height: .greatestFiniteMagnitude)
             let container = NSTextContainer(size: size)
             container.lineFragmentPadding = 0
             return container
@@ -264,7 +269,7 @@ private final class TextBubbleLayoutModel {
             return layoutManager
         }()
 
-        let rect = layoutManager.usedRectForTextContainer(textContainer)
+        let rect = layoutManager.usedRect(for: textContainer)
         return rect.size.bma_round()
     }
 
@@ -277,26 +282,20 @@ private final class TextBubbleLayoutModel {
     }
 }
 
-private func == (lhs: TextBubbleLayoutModel.LayoutContext, rhs: TextBubbleLayoutModel.LayoutContext) -> Bool {
-    let lhsValues = (lhs.text, lhs.textInsets, lhs.font, lhs.preferredMaxLayoutWidth)
-    let rhsValues = (rhs.text, rhs.textInsets, rhs.font, rhs.preferredMaxLayoutWidth)
-    return lhsValues == rhsValues
-}
-
 /// UITextView with hacks to avoid selection, loupe, define...
 private final class ChatMessageTextView: UITextView {
 
-    override func canBecomeFirstResponder() -> Bool {
+    override var canBecomeFirstResponder: Bool {
         return false
     }
 
-    override func addGestureRecognizer(gestureRecognizer: UIGestureRecognizer) {
-        if gestureRecognizer.dynamicType == UILongPressGestureRecognizer.self && gestureRecognizer.delaysTouchesEnded {
+    override func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
+        if type(of: gestureRecognizer) == UILongPressGestureRecognizer.self && gestureRecognizer.delaysTouchesEnded {
             super.addGestureRecognizer(gestureRecognizer)
         }
     }
 
-    override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
+    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
         return false
     }
 

ChattoAdditions/Source/Chat Items/TextMessages/Views/TextMessageCollectionViewCell.swift

@@ -30,21 +30,17 @@ public final class TextMessageCollectionViewCell: BaseMessageCollectionViewCell<
 
     public static func sizingCell() -> TextMessageCollectionViewCell {
         let cell = TextMessageCollectionViewCell(frame: CGRect.zero)
-        cell.viewContext = .Sizing
+        cell.viewContext = .sizing
         return cell
     }
 
-    override init(frame: CGRect) {
-        super.init(frame: frame)
-    }
-
     // MARK: Subclassing (view creation)
 
     public override func createBubbleView() -> TextBubbleView {
         return TextBubbleView()
     }
 
-    public override func performBatchUpdates(updateClosure: () -> Void, animated: Bool, completion: (() -> Void)?) {
+    public override func performBatchUpdates(_ updateClosure: @escaping () -> Void, animated: Bool, completion: (() -> Void)?) {
         super.performBatchUpdates({ () -> Void in
             self.bubbleView.performBatchUpdates(updateClosure, animated: false, completion: nil)
         }, animated: animated, completion: completion)
@@ -71,13 +67,13 @@ public final class TextMessageCollectionViewCell: BaseMessageCollectionViewCell<
         }
     }
 
-    override public var selected: Bool {
+    override public var isSelected: Bool {
         didSet {
-            self.bubbleView.selected = self.selected
+            self.bubbleView.selected = self.isSelected
         }
     }
 
-    public var layoutCache: NSCache! {
+    public var layoutCache: NSCache<AnyObject, AnyObject>! {
         didSet {
             self.bubbleView.layoutCache = self.layoutCache
         }

ChattoAdditions/Source/Chat Items/TextMessages/Views/TextMessageCollectionViewCellDefaultStyle.swift

@@ -24,7 +24,7 @@
 
 import UIKit
 
-public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionViewCellStyleProtocol {
+open class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionViewCellStyleProtocol {
     typealias Class = TextMessageCollectionViewCellDefaultStyle
 
     public struct BubbleImages {
@@ -33,10 +33,10 @@ public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionVie
         let outgoingTail: () -> UIImage
         let outgoingNoTail: () -> UIImage
         public init(
-            @autoclosure(escaping) incomingTail: () -> UIImage,
-            @autoclosure(escaping) incomingNoTail: () -> UIImage,
-            @autoclosure(escaping) outgoingTail: () -> UIImage,
-            @autoclosure(escaping) outgoingNoTail: () -> UIImage) {
+            incomingTail: @autoclosure @escaping () -> UIImage,
+            incomingNoTail: @autoclosure @escaping () -> UIImage,
+            outgoingTail: @autoclosure @escaping () -> UIImage,
+            outgoingNoTail: @autoclosure @escaping () -> UIImage) {
                 self.incomingTail = incomingTail
                 self.incomingNoTail = incomingNoTail
                 self.outgoingTail = outgoingTail
@@ -51,9 +51,9 @@ public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionVie
         let incomingInsets: UIEdgeInsets
         let outgoingInsets: UIEdgeInsets
         public init(
-            @autoclosure(escaping) font: () -> UIFont,
-            @autoclosure(escaping) incomingColor: () -> UIColor,
-            @autoclosure(escaping) outgoingColor: () -> UIColor,
+            font: @autoclosure @escaping () -> UIFont,
+            incomingColor: @autoclosure @escaping () -> UIColor,
+            outgoingColor: @autoclosure @escaping () -> UIColor,
             incomingInsets: UIEdgeInsets,
             outgoingInsets: UIEdgeInsets) {
                 self.font = font
@@ -64,7 +64,6 @@ public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionVie
         }
     }
 
-
     public let bubbleImages: BubbleImages
     public let textStyle: TextStyle
     public let baseStyle: BaseMessageCollectionViewCellDefaultStyle
@@ -90,23 +89,23 @@ public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionVie
     lazy var incomingColor: UIColor = self.textStyle.incomingColor()
     lazy var outgoingColor: UIColor = self.textStyle.outgoingColor()
 
-    public func textFont(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIFont {
+    open func textFont(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIFont {
         return self.font
     }
 
-    public func textColor(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIColor {
+    open func textColor(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIColor {
         return viewModel.isIncoming ? self.incomingColor : self.outgoingColor
     }
 
-    public func textInsets(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIEdgeInsets {
+    open func textInsets(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIEdgeInsets {
         return viewModel.isIncoming ? self.textStyle.incomingInsets : self.textStyle.outgoingInsets
     }
 
-    public func bubbleImageBorder(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage? {
+    open func bubbleImageBorder(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage? {
         return self.baseStyle.borderImage(viewModel: viewModel)
     }
 
-    public func bubbleImage(viewModel viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage {
+    open func bubbleImage(viewModel: TextMessageViewModelProtocol, isSelected: Bool) -> UIImage {
         let key = ImageKey.normal(isIncoming: viewModel.isIncoming, status: viewModel.status, showsTail: viewModel.showsTail, isSelected: isSelected)
 
         if let image = self.images[key] {
@@ -124,18 +123,18 @@ public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionVie
         return UIImage()
     }
 
-    public func createImage(templateImage image: UIImage, isIncoming: Bool, status: MessageViewModelStatus, isSelected: Bool) -> UIImage {
+    open func createImage(templateImage image: UIImage, isIncoming: Bool, status: MessageViewModelStatus, isSelected: Bool) -> UIImage {
         var color = isIncoming ? self.baseStyle.baseColorIncoming : self.baseStyle.baseColorOutgoing
 
         switch status {
-        case .Success:
+        case .success:
             break
-        case .Failed, .Sending:
-            color = color.bma_blendWithColor(UIColor.whiteColor().colorWithAlphaComponent(0.70))
+        case .failed, .sending:
+            color = color.bma_blendWithColor(UIColor.white.withAlphaComponent(0.70))
         }
 
         if isSelected {
-            color = color.bma_blendWithColor(UIColor.blackColor().colorWithAlphaComponent(0.10))
+            color = color.bma_blendWithColor(UIColor.black.withAlphaComponent(0.10))
         }
 
         return image.bma_tintWithColor(color)
@@ -155,19 +154,19 @@ public class TextMessageCollectionViewCellDefaultStyle: TextMessageCollectionVie
         }
 
         private func calculateHash(withHashValues hashes: [Int]) -> Int {
-            return hashes.reduce(0, combine: { 31 &* $0 &+ $1.hashValue })
+            return hashes.reduce(0, { 31 &* $0 &+ $1.hashValue })
         }
-    }
-}
 
-private func == (lhs: TextMessageCollectionViewCellDefaultStyle.ImageKey, rhs: TextMessageCollectionViewCellDefaultStyle.ImageKey) -> Bool {
-    switch (lhs, rhs) {
-    case let (.template(lhsValues), .template(rhsValues)):
-        return lhsValues == rhsValues
-    case let (.normal(lhsValues), .normal(rhsValues)):
-        return lhsValues == rhsValues
-    default:
-        return false
+        static func == (lhs: TextMessageCollectionViewCellDefaultStyle.ImageKey, rhs: TextMessageCollectionViewCellDefaultStyle.ImageKey) -> Bool {
+            switch (lhs, rhs) {
+            case let (.template(lhsValues), .template(rhsValues)):
+                return lhsValues == rhsValues
+            case let (.normal(lhsValues), .normal(rhsValues)):
+                return lhsValues == rhsValues
+            default:
+                return false
+            }
+        }
     }
 }
 
@@ -175,18 +174,18 @@ public extension TextMessageCollectionViewCellDefaultStyle { // Default values
 
     static public func createDefaultBubbleImages() -> BubbleImages {
         return BubbleImages(
-            incomingTail: UIImage(named: "bubble-incoming-tail", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            incomingNoTail: UIImage(named: "bubble-incoming", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            outgoingTail: UIImage(named: "bubble-outgoing-tail", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            outgoingNoTail: UIImage(named: "bubble-outgoing", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!
+            incomingTail: UIImage(named: "bubble-incoming-tail", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            incomingNoTail: UIImage(named: "bubble-incoming", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            outgoingTail: UIImage(named: "bubble-outgoing-tail", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            outgoingNoTail: UIImage(named: "bubble-outgoing", in: Bundle(for: Class.self), compatibleWith: nil)!
         )
     }
 
     static public func createDefaultTextStyle() -> TextStyle {
         return TextStyle(
-            font: UIFont.systemFontOfSize(16),
-            incomingColor: UIColor.blackColor(),
-            outgoingColor: UIColor.whiteColor(),
+            font: UIFont.systemFont(ofSize: 16),
+            incomingColor: UIColor.black,
+            outgoingColor: UIColor.white,
             incomingInsets: UIEdgeInsets(top: 10, left: 19, bottom: 10, right: 15),
             outgoingInsets: UIEdgeInsets(top: 10, left: 15, bottom: 10, right: 19)
         )

ChattoAdditions/Source/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.1.0</string>
+	<string>3.0.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

ChattoAdditions/Source/Input/ChatInputBar.swift

@@ -25,17 +25,17 @@
 import UIKit
 
 public protocol ChatInputBarDelegate: class {
-    func inputBarShouldBeginTextEditing(inputBar: ChatInputBar) -> Bool
-    func inputBarDidBeginEditing(inputBar: ChatInputBar)
-    func inputBarDidEndEditing(inputBar: ChatInputBar)
-    func inputBarDidChangeText(inputBar: ChatInputBar)
-    func inputBarSendButtonPressed(inputBar: ChatInputBar)
-    func inputBar(inputBar: ChatInputBar, shouldFocusOnItem item: ChatInputItemProtocol) -> Bool
-    func inputBar(inputBar: ChatInputBar, didReceiveFocusOnItem item: ChatInputItemProtocol)
+    func inputBarShouldBeginTextEditing(_ inputBar: ChatInputBar) -> Bool
+    func inputBarDidBeginEditing(_ inputBar: ChatInputBar)
+    func inputBarDidEndEditing(_ inputBar: ChatInputBar)
+    func inputBarDidChangeText(_ inputBar: ChatInputBar)
+    func inputBarSendButtonPressed(_ inputBar: ChatInputBar)
+    func inputBar(_ inputBar: ChatInputBar, shouldFocusOnItem item: ChatInputItemProtocol) -> Bool
+    func inputBar(_ inputBar: ChatInputBar, didReceiveFocusOnItem item: ChatInputItemProtocol)
 }
 
 @objc
-public class ChatInputBar: ReusableXibView {
+open class ChatInputBar: ReusableXibView {
 
     public weak var delegate: ChatInputBarDelegate?
     weak var presenter: ChatInputBarPresenter?
@@ -56,8 +56,8 @@ public class ChatInputBar: ReusableXibView {
     @IBOutlet var constraintsForHiddenSendButton: [NSLayoutConstraint]!
     @IBOutlet var tabBarContainerHeightConstraint: NSLayoutConstraint!
 
-    class public func loadNib() -> ChatInputBar {
-        let view = NSBundle(forClass: self).loadNibNamed(self.nibName(), owner: nil, options: nil)!.first as! ChatInputBar
+    class open func loadNib() -> ChatInputBar {
+        let view = Bundle(for: self).loadNibNamed(self.nibName(), owner: nil, options: nil)!.first as! ChatInputBar
         view.translatesAutoresizingMaskIntoConstraints = false
         view.frame = CGRect.zero
         return view
@@ -67,34 +67,34 @@ public class ChatInputBar: ReusableXibView {
         return "ChatInputBar"
     }
 
-    public override func awakeFromNib() {
+    open override func awakeFromNib() {
         super.awakeFromNib()
-        self.topBorderHeightConstraint.constant = 1 / UIScreen.mainScreen().scale
+        self.topBorderHeightConstraint.constant = 1 / UIScreen.main.scale
         self.textView.scrollsToTop = false
         self.textView.delegate = self
         self.scrollView.scrollsToTop = false
-        self.sendButton.enabled = false
+        self.sendButton.isEnabled = false
     }
 
-    public override func updateConstraints() {
+    open override func updateConstraints() {
         if self.showsTextView {
-            NSLayoutConstraint.activateConstraints(self.constraintsForVisibleTextView)
-            NSLayoutConstraint.deactivateConstraints(self.constraintsForHiddenTextView)
+            NSLayoutConstraint.activate(self.constraintsForVisibleTextView)
+            NSLayoutConstraint.deactivate(self.constraintsForHiddenTextView)
         } else {
-            NSLayoutConstraint.deactivateConstraints(self.constraintsForVisibleTextView)
-            NSLayoutConstraint.activateConstraints(self.constraintsForHiddenTextView)
+            NSLayoutConstraint.deactivate(self.constraintsForVisibleTextView)
+            NSLayoutConstraint.activate(self.constraintsForHiddenTextView)
         }
         if self.showsSendButton {
-            NSLayoutConstraint.deactivateConstraints(self.constraintsForHiddenSendButton)
-            NSLayoutConstraint.activateConstraints(self.constraintsForVisibleSendButton)
+            NSLayoutConstraint.deactivate(self.constraintsForHiddenSendButton)
+            NSLayoutConstraint.activate(self.constraintsForVisibleSendButton)
         } else {
-            NSLayoutConstraint.deactivateConstraints(self.constraintsForVisibleSendButton)
-            NSLayoutConstraint.activateConstraints(self.constraintsForHiddenSendButton)
+            NSLayoutConstraint.deactivate(self.constraintsForVisibleSendButton)
+            NSLayoutConstraint.activate(self.constraintsForHiddenSendButton)
         }
         super.updateConstraints()
     }
 
-    public var showsTextView: Bool = true {
+    open var showsTextView: Bool = true {
         didSet {
             self.setNeedsUpdateConstraints()
             self.setNeedsLayout()
@@ -102,7 +102,7 @@ public class ChatInputBar: ReusableXibView {
         }
     }
 
-    public var showsSendButton: Bool = true {
+    open var showsSendButton: Bool = true {
         didSet {
             self.setNeedsUpdateConstraints()
             self.setNeedsLayout()
@@ -113,15 +113,15 @@ public class ChatInputBar: ReusableXibView {
     public var maxCharactersCount: UInt? // nil -> unlimited
 
     private func updateIntrinsicContentSizeAnimated() {
-        let options: UIViewAnimationOptions = [.BeginFromCurrentState, .AllowUserInteraction, .CurveEaseInOut]
-        UIView.animateWithDuration(0.25, delay: 0, options: options, animations: { () -> Void in
+        let options: UIViewAnimationOptions = [.beginFromCurrentState, .allowUserInteraction]
+        UIView.animate(withDuration: 0.25, delay: 0, options: options, animations: { () -> Void in
             self.invalidateIntrinsicContentSize()
             self.layoutIfNeeded()
             self.superview?.layoutIfNeeded()
         }, completion: nil)
     }
 
-    public override func layoutSubviews() {
+    open override func layoutSubviews() {
         self.updateConstraints() // Interface rotation or size class changes will reset constraints as defined in interface builder -> constraintsForVisibleTextView will be activated
         super.layoutSubviews()
     }
@@ -138,10 +138,10 @@ public class ChatInputBar: ReusableXibView {
         }
     }
 
-    public func becomeFirstResponderWithInputView(inputView: UIView?) {
+    open func becomeFirstResponderWithInputView(_ inputView: UIView?) {
         self.textView.inputView = inputView
 
-        if self.textView.isFirstResponder() {
+        if self.textView.isFirstResponder {
             self.textView.reloadInputViews()
         } else {
             self.textView.becomeFirstResponder()
@@ -158,27 +158,27 @@ public class ChatInputBar: ReusableXibView {
         }
     }
 
-    private func updateSendButton() {
-        self.sendButton.enabled = self.shouldEnableSendButton(self)
+    fileprivate func updateSendButton() {
+        self.sendButton.isEnabled = self.shouldEnableSendButton(self)
     }
 
-    @IBAction func buttonTapped(sender: AnyObject) {
+    @IBAction func buttonTapped(_ sender: AnyObject) {
         self.presenter?.onSendButtonPressed()
         self.delegate?.inputBarSendButtonPressed(self)
     }
 
-    public func setTextViewPlaceholderAccessibilityIdentifer(accessibilityIdentifer: String) {
+    public func setTextViewPlaceholderAccessibilityIdentifer(_ accessibilityIdentifer: String) {
         self.textView.setTextPlaceholderAccessibilityIdentifier(accessibilityIdentifer)
     }
 }
 
 // MARK: - ChatInputItemViewDelegate
 extension ChatInputBar: ChatInputItemViewDelegate {
-    func inputItemViewTapped(view: ChatInputItemView) {
+    func inputItemViewTapped(_ view: ChatInputItemView) {
         self.focusOnInputItem(view.inputItem)
     }
 
-    public func focusOnInputItem(inputItem: ChatInputItemProtocol) {
+    public func focusOnInputItem(_ inputItem: ChatInputItemProtocol) {
         let shouldFocus = self.delegate?.inputBar(self, shouldFocusOnItem: inputItem) ?? true
         guard shouldFocus else { return }
 
@@ -189,7 +189,7 @@ extension ChatInputBar: ChatInputItemViewDelegate {
 
 // MARK: - ChatInputBarAppearance
 extension ChatInputBar {
-    public func setAppearance(appearance: ChatInputBarAppearance) {
+    public func setAppearance(_ appearance: ChatInputBarAppearance) {
         self.textView.font = appearance.textInputAppearance.font
         self.textView.textColor = appearance.textInputAppearance.textColor
         self.textView.textContainerInset = appearance.textInputAppearance.textInsets
@@ -199,9 +199,9 @@ extension ChatInputBar {
         self.tabBarInterItemSpacing = appearance.tabBarAppearance.interItemSpacing
         self.tabBarContentInsets = appearance.tabBarAppearance.contentInsets
         self.sendButton.contentEdgeInsets = appearance.sendButtonAppearance.insets
-        self.sendButton.setTitle(appearance.sendButtonAppearance.title, forState: .Normal)
+        self.sendButton.setTitle(appearance.sendButtonAppearance.title, for: .normal)
         appearance.sendButtonAppearance.titleColors.forEach { (state, color) in
-            self.sendButton.setTitleColor(color, forState: state.controlState)
+            self.sendButton.setTitleColor(color, for: state.controlState)
         }
         self.sendButton.titleLabel?.font = appearance.sendButtonAppearance.font
         self.tabBarContainerHeightConstraint.constant = appearance.tabBarAppearance.height
@@ -230,30 +230,30 @@ extension ChatInputBar { // Tabar
 
 // MARK: UITextViewDelegate
 extension ChatInputBar: UITextViewDelegate {
-    public func textViewShouldBeginEditing(textView: UITextView) -> Bool {
+    public func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {
         return self.delegate?.inputBarShouldBeginTextEditing(self) ?? true
     }
 
-    public func textViewDidEndEditing(textView: UITextView) {
+    public func textViewDidEndEditing(_ textView: UITextView) {
         self.presenter?.onDidEndEditing()
         self.delegate?.inputBarDidEndEditing(self)
     }
 
-    public func textViewDidBeginEditing(textView: UITextView) {
+    public func textViewDidBeginEditing(_ textView: UITextView) {
         self.presenter?.onDidBeginEditing()
         self.delegate?.inputBarDidBeginEditing(self)
     }
 
-    public func textViewDidChange(textView: UITextView) {
+    public func textViewDidChange(_ textView: UITextView) {
         self.updateSendButton()
         self.delegate?.inputBarDidChangeText(self)
     }
 
-    public func textView(textView: UITextView, shouldChangeTextInRange nsRange: NSRange, replacementText text: String) -> Bool {
+    public func textView(_ textView: UITextView, shouldChangeTextIn nsRange: NSRange, replacementText text: String) -> Bool {
         let range = self.textView.text.bma_rangeFromNSRange(nsRange)
         if let maxCharactersCount = self.maxCharactersCount {
             let currentCount = textView.text.characters.count
-            let rangeLength = textView.text.substringWithRange(range).characters.count
+            let rangeLength = textView.text.substring(with: range).characters.count
             let nextCount = currentCount - rangeLength + text.characters.count
             return UInt(nextCount) <= maxCharactersCount
         }
@@ -262,12 +262,13 @@ extension ChatInputBar: UITextViewDelegate {
 }
 
 private extension String {
-    func bma_rangeFromNSRange(nsRange: NSRange) -> Range<String.Index> {
-        let from16 = self.utf16.startIndex.advancedBy(nsRange.location, limit: self.utf16.endIndex)
-        let to16 = from16.advancedBy(nsRange.length, limit: self.utf16.endIndex)
-        if let from = String.Index(from16, within: self), to = String.Index(to16, within: self) {
-            return from ..< to
-        }
-        return self.startIndex...self.startIndex
+    func bma_rangeFromNSRange(_ nsRange: NSRange) -> Range<String.Index> {
+        guard
+            let from16 = utf16.index(utf16.startIndex, offsetBy: nsRange.location, limitedBy: utf16.endIndex),
+            let to16 = utf16.index(from16, offsetBy: nsRange.length, limitedBy: utf16.endIndex),
+            let from = String.Index(from16, within: self),
+            let to = String.Index(to16, within: self)
+            else { return  self.startIndex..<self.startIndex }
+        return from ..< to
     }
 }

ChattoAdditions/Source/Input/ChatInputBarAppearance.swift

@@ -24,13 +24,13 @@
 
 public struct ChatInputBarAppearance {
     public struct SendButtonAppearance {
-        public var font = UIFont.systemFontOfSize(16)
+        public var font = UIFont.systemFont(ofSize: 16)
         public var insets = UIEdgeInsets(top: 0, left: 20, bottom: 0, right: 20)
         public var title = ""
         public var titleColors: [UIControlStateWrapper: UIColor] = [
-            UIControlStateWrapper(state: .Disabled): UIColor.bma_color(rgb: 0x9AA3AB),
-            UIControlStateWrapper(state: .Normal): UIColor.bma_color(rgb: 0x007AFF),
-            UIControlStateWrapper(state: .Highlighted): UIColor.bma_color(rgb: 0x007AFF).bma_blendWithColor(UIColor.whiteColor().colorWithAlphaComponent(0.4))
+            UIControlStateWrapper(state: .disabled): UIColor.bma_color(rgb: 0x9AA3AB),
+            UIControlStateWrapper(state: .normal): UIColor.bma_color(rgb: 0x007AFF),
+            UIControlStateWrapper(state: .highlighted): UIColor.bma_color(rgb: 0x007AFF).bma_blendWithColor(UIColor.white.withAlphaComponent(0.4))
         ]
     }
 
@@ -41,10 +41,10 @@ public struct ChatInputBarAppearance {
     }
 
     public struct TextInputAppearance {
-        public var font = UIFont.systemFontOfSize(12)
-        public var textColor = UIColor.blackColor()
-        public var placeholderFont = UIFont.systemFontOfSize(12)
-        public var placeholderColor = UIColor.grayColor()
+        public var font = UIFont.systemFont(ofSize: 12)
+        public var textColor = UIColor.black
+        public var placeholderFont = UIFont.systemFont(ofSize: 12)
+        public var placeholderColor = UIColor.gray
         public var placeholderText = ""
         public var textInsets = UIEdgeInsets(top: 8, left: 0, bottom: 8, right: 0)
     }
@@ -56,7 +56,6 @@ public struct ChatInputBarAppearance {
     public init() {}
 }
 
-
 // Workaround for SR-2223
 public struct UIControlStateWrapper: Hashable {
 

ChattoAdditions/Source/Input/ChatInputBarPresenter.swift

@@ -29,18 +29,19 @@ protocol ChatInputBarPresenter: class {
     func onDidBeginEditing()
     func onDidEndEditing()
     func onSendButtonPressed()
-    func onDidReceiveFocusOnItem(item: ChatInputItemProtocol)
+    func onDidReceiveFocusOnItem(_ item: ChatInputItemProtocol)
 }
 
-@objc public class BasicChatInputBarPresenter: NSObject, ChatInputBarPresenter {
+@objc
+public class BasicChatInputBarPresenter: NSObject, ChatInputBarPresenter {
     let chatInputBar: ChatInputBar
     let chatInputItems: [ChatInputItemProtocol]
-    let notificationCenter: NSNotificationCenter
+    let notificationCenter: NotificationCenter
 
     public init(chatInputBar: ChatInputBar,
                 chatInputItems: [ChatInputItemProtocol],
                 chatInputBarAppearance: ChatInputBarAppearance,
-                notificationCenter: NSNotificationCenter = NSNotificationCenter.defaultCenter()) {
+                notificationCenter: NotificationCenter = NotificationCenter.default) {
         self.chatInputBar = chatInputBar
         self.chatInputItems = chatInputItems
         self.chatInputBar.setAppearance(chatInputBarAppearance)
@@ -49,16 +50,16 @@ protocol ChatInputBarPresenter: class {
 
         self.chatInputBar.presenter = self
         self.chatInputBar.inputItems = self.chatInputItems
-        self.notificationCenter.addObserver(self, selector: #selector(BasicChatInputBarPresenter.keyboardDidChangeFrame), name: UIKeyboardDidChangeFrameNotification, object: nil)
-        self.notificationCenter.addObserver(self, selector: #selector(BasicChatInputBarPresenter.keyboardWillHide), name: UIKeyboardWillHideNotification, object: nil)
-        self.notificationCenter.addObserver(self, selector: #selector(BasicChatInputBarPresenter.keyboardWillShow), name: UIKeyboardWillShowNotification, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(BasicChatInputBarPresenter.keyboardDidChangeFrame), name: NSNotification.Name.UIKeyboardDidChangeFrame, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(BasicChatInputBarPresenter.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(BasicChatInputBarPresenter.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
     }
 
     deinit {
         self.notificationCenter.removeObserver(self)
     }
 
-    private(set) var focusedItem: ChatInputItemProtocol? {
+    fileprivate(set) var focusedItem: ChatInputItemProtocol? {
         willSet {
             self.focusedItem?.selected = false
         }
@@ -67,11 +68,11 @@ protocol ChatInputBarPresenter: class {
         }
     }
 
-    private func updateFirstResponderWithInputItem(inputItem: ChatInputItemProtocol) {
-        let responder = self.chatInputBar.textView
+    fileprivate func updateFirstResponderWithInputItem(_ inputItem: ChatInputItemProtocol) {
+        let responder = self.chatInputBar.textView!
         let inputView = inputItem.inputView
         responder.inputView = inputView
-        if responder.isFirstResponder() {
+        if responder.isFirstResponder {
             self.setHeight(forInputView: inputView)
             responder.reloadInputViews()
         } else {
@@ -79,10 +80,10 @@ protocol ChatInputBarPresenter: class {
         }
     }
 
-    private func firstKeyboardInputItem() -> ChatInputItemProtocol? {
+    fileprivate func firstKeyboardInputItem() -> ChatInputItemProtocol? {
         var firstKeyboardInputItem: ChatInputItemProtocol? = nil
         for inputItem in self.chatInputItems {
-            if inputItem.presentationMode == .Keyboard {
+            if inputItem.presentationMode == .keyboard {
                 firstKeyboardInputItem = inputItem
                 break
             }
@@ -97,13 +98,13 @@ protocol ChatInputBarPresenter: class {
         guard let keyboardHeight = self.lastKnownKeyboardHeight else { return }
 
         var mask = inputView.autoresizingMask
-        mask.remove(.FlexibleHeight)
+        mask.remove(.flexibleHeight)
         inputView.autoresizingMask = mask
 
         let accessoryViewHeight = self.chatInputBar.textView.inputAccessoryView?.bounds.height ?? 0
         let inputViewHeight = keyboardHeight - accessoryViewHeight
 
-        if let heightConstraint = inputView.constraints.filter({ $0.firstAttribute == .Height }).first {
+        if let heightConstraint = inputView.constraints.filter({ $0.firstAttribute == .height }).first {
             heightConstraint.constant = inputViewHeight
         } else {
             inputView.frame.size.height = inputViewHeight
@@ -113,19 +114,19 @@ protocol ChatInputBarPresenter: class {
     private var allowListenToChangeFrameEvents = true
 
     @objc
-    private func keyboardDidChangeFrame(notification: NSNotification) {
+    private func keyboardDidChangeFrame(_ notification: Notification) {
         guard self.allowListenToChangeFrameEvents else { return }
-        guard let value = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return }
-        self.lastKnownKeyboardHeight = value.CGRectValue().height
+        guard let value = (notification as NSNotification).userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return }
+        self.lastKnownKeyboardHeight = value.cgRectValue.height
     }
 
     @objc
-    private func keyboardWillHide(notification: NSNotification) {
+    private func keyboardWillHide(_ notification: Notification) {
         self.allowListenToChangeFrameEvents = false
     }
 
     @objc
-    private func keyboardWillShow(notification: NSNotification) {
+    private func keyboardWillShow(_ notification: Notification) {
         self.allowListenToChangeFrameEvents = true
     }
 }
@@ -147,20 +148,20 @@ extension BasicChatInputBarPresenter {
 
     func onSendButtonPressed() {
         if let focusedItem = self.focusedItem {
-            focusedItem.handleInput(self.chatInputBar.inputText)
+            focusedItem.handleInput(self.chatInputBar.inputText as AnyObject)
         } else if let keyboardItem = self.firstKeyboardInputItem() {
-            keyboardItem.handleInput(self.chatInputBar.inputText)
+            keyboardItem.handleInput(self.chatInputBar.inputText as AnyObject)
         }
         self.chatInputBar.inputText = ""
     }
 
-    func onDidReceiveFocusOnItem(item: ChatInputItemProtocol) {
-        guard item.presentationMode != .None else { return }
+    func onDidReceiveFocusOnItem(_ item: ChatInputItemProtocol) {
+        guard item.presentationMode != .none else { return }
         guard item !== self.focusedItem else { return }
 
         self.focusedItem = item
         self.chatInputBar.showsSendButton = item.showsSendButton
-        self.chatInputBar.showsTextView = item.presentationMode == .Keyboard
+        self.chatInputBar.showsTextView = item.presentationMode == .keyboard
         self.updateFirstResponderWithInputItem(item)
     }
 }

ChattoAdditions/Source/Input/ChatInputItem.swift

@@ -25,9 +25,9 @@
 import Foundation
 
 public enum ChatInputItemPresentationMode: UInt {
-    case Keyboard
-    case CustomView
-    case None
+    case keyboard
+    case customView
+    case none
 }
 
 public protocol ChatInputItemProtocol: AnyObject {
@@ -37,5 +37,5 @@ public protocol ChatInputItemProtocol: AnyObject {
     var showsSendButton: Bool { get }
     var selected: Bool { get set }
 
-    func handleInput(input: AnyObject)
+    func handleInput(_ input: AnyObject)
 }

ChattoAdditions/Source/Input/ChatInputItemView.swift

@@ -25,7 +25,7 @@
 import Foundation
 
 protocol ChatInputItemViewDelegate: class {
-    func inputItemViewTapped(view: ChatInputItemView)
+    func inputItemViewTapped(_ view: ChatInputItemView)
 }
 
 class ChatInputItemView: UIView {
@@ -72,7 +72,7 @@ extension ChatInputItemView {
         self.inputItem.tabView.frame = self.bounds
     }
 
-    override func intrinsicContentSize() -> CGSize {
-        return self.inputItem.tabView.intrinsicContentSize()
+    override var intrinsicContentSize: CGSize {
+        return self.inputItem.tabView.intrinsicContentSize
     }
 }

ChattoAdditions/Source/Input/ExpandableTextView.swift

@@ -24,7 +24,7 @@
 
 import UIKit
 
-public class ExpandableTextView: UITextView {
+open class ExpandableTextView: UITextView {
 
     private let placeholder: UITextView = UITextView()
 
@@ -38,7 +38,7 @@ public class ExpandableTextView: UITextView {
         self.commonInit()
     }
 
-    override public var contentSize: CGSize {
+    override open var contentSize: CGSize {
         didSet {
             self.invalidateIntrinsicContentSize()
             self.layoutIfNeeded() // needed?
@@ -46,56 +46,55 @@ public class ExpandableTextView: UITextView {
     }
 
     deinit {
-        NSNotificationCenter.defaultCenter().removeObserver(self)
+        NotificationCenter.default.removeObserver(self)
     }
 
     private func commonInit() {
-        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ExpandableTextView.textDidChange), name: UITextViewTextDidChangeNotification, object: self)
+        NotificationCenter.default.addObserver(self, selector: #selector(ExpandableTextView.textDidChange), name: NSNotification.Name.UITextViewTextDidChange, object: self)
         self.configurePlaceholder()
         self.updatePlaceholderVisibility()
     }
 
-
-    override public func layoutSubviews() {
+    override open func layoutSubviews() {
         super.layoutSubviews()
         self.placeholder.frame = self.bounds
     }
 
-    override public func intrinsicContentSize() -> CGSize {
+    override open var intrinsicContentSize: CGSize {
         return self.contentSize
     }
 
-    override public var text: String! {
+    override open var text: String! {
         didSet {
             self.textDidChange()
         }
     }
 
-    override public var textContainerInset: UIEdgeInsets {
+    override open var textContainerInset: UIEdgeInsets {
         didSet {
             self.configurePlaceholder()
         }
     }
 
-    override public var textAlignment: NSTextAlignment {
+    override open var textAlignment: NSTextAlignment {
         didSet {
             self.configurePlaceholder()
         }
     }
 
-    public func setTextPlaceholder(textPlaceholder: String) {
+    open func setTextPlaceholder(_ textPlaceholder: String) {
         self.placeholder.text = textPlaceholder
     }
 
-    public func setTextPlaceholderColor(color: UIColor) {
+    open func setTextPlaceholderColor(_ color: UIColor) {
         self.placeholder.textColor = color
     }
 
-    public func setTextPlaceholderFont(font: UIFont) {
+    open func setTextPlaceholderFont(_ font: UIFont) {
         self.placeholder.font = font
     }
 
-    public func setTextPlaceholderAccessibilityIdentifier(accessibilityIdentifier: String) {
+    open func setTextPlaceholderAccessibilityIdentifier(_ accessibilityIdentifier: String) {
         self.placeholder.accessibilityIdentifier = accessibilityIdentifier
     }
 
@@ -109,14 +108,14 @@ public class ExpandableTextView: UITextView {
             // 2. Paste very long text (so it snaps to nav bar and shows scroll indicators)
             // 3. Select all and cut
             // 4. Paste again: Texview it's smaller than it should be
-            self.scrollEnabled = false
-            self.scrollEnabled = true
+            self.isScrollEnabled = false
+            self.isScrollEnabled = true
         }
     }
 
     private func scrollToCaret() {
         if let textRange = self.selectedTextRange {
-            var rect = caretRectForPosition(textRange.end)
+            var rect = caretRect(for: textRange.end)
             rect = CGRect(origin: rect.origin, size: CGSize(width: rect.width, height: rect.height + textContainerInset.bottom))
 
             self.scrollRectToVisible(rect, animated: false)
@@ -141,11 +140,11 @@ public class ExpandableTextView: UITextView {
 
     private func configurePlaceholder() {
         self.placeholder.translatesAutoresizingMaskIntoConstraints = false
-        self.placeholder.editable = false
-        self.placeholder.selectable = false
-        self.placeholder.userInteractionEnabled = false
+        self.placeholder.isEditable = false
+        self.placeholder.isSelectable = false
+        self.placeholder.isUserInteractionEnabled = false
         self.placeholder.textAlignment = self.textAlignment
         self.placeholder.textContainerInset = self.textContainerInset
-        self.placeholder.backgroundColor = UIColor.clearColor()
+        self.placeholder.backgroundColor = UIColor.clear
     }
 }

ChattoAdditions/Source/Input/HorizontalStackScrollView.swift

@@ -24,7 +24,7 @@
 
 import UIKit
 
-public class HorizontalStackScrollView: UIScrollView {
+open class HorizontalStackScrollView: UIScrollView {
 
     private var arrangedViews: [UIView] = []
     private var arrangedViewContraints: [NSLayoutConstraint] = []
@@ -34,16 +34,16 @@ public class HorizontalStackScrollView: UIScrollView {
         }
     }
 
-    func addArrangedViews(views: [UIView]) {
+    func addArrangedViews(_ views: [UIView]) {
         for view in views {
             view.translatesAutoresizingMaskIntoConstraints = false
             self.addSubview(view)
         }
-        self.arrangedViews.appendContentsOf(views)
+        self.arrangedViews.append(contentsOf: views)
         self.setNeedsUpdateConstraints()
     }
 
-    override public func updateConstraints() {
+    override open func updateConstraints() {
         super.updateConstraints()
         self.removeConstraintsForArrangedViews()
         self.addConstraintsForArrengedViews()
@@ -57,23 +57,23 @@ public class HorizontalStackScrollView: UIScrollView {
     }
 
     private func addConstraintsForArrengedViews() {
-        for (index, view) in arrangedViews.enumerate() {
+        for (index, view) in arrangedViews.enumerated() {
             switch index {
             case 0:
-                let constraint = NSLayoutConstraint(item: view, attribute: .Leading, relatedBy: .Equal, toItem: self, attribute: .Leading, multiplier: 1, constant: 0)
+                let constraint = NSLayoutConstraint(item: view, attribute: .leading, relatedBy: .equal, toItem: self, attribute: .leading, multiplier: 1, constant: 0)
                 self.addConstraint(constraint)
                 self.arrangedViewContraints.append(constraint)
             case arrangedViews.count-1:
-                let constraint = NSLayoutConstraint(item: view, attribute: .Trailing, relatedBy: .Equal, toItem: self, attribute: .Trailing, multiplier: 1, constant: 0)
+                let constraint = NSLayoutConstraint(item: view, attribute: .trailing, relatedBy: .equal, toItem: self, attribute: .trailing, multiplier: 1, constant: 0)
                 self.addConstraint(constraint)
                 self.arrangedViewContraints.append(constraint)
                 fallthrough
             default:
-                let constraint = NSLayoutConstraint(item: view, attribute: .Leading, relatedBy: .Equal, toItem: arrangedViews[index-1], attribute: .Trailing, multiplier: 1, constant: self.interItemSpacing)
+                let constraint = NSLayoutConstraint(item: view, attribute: .leading, relatedBy: .equal, toItem: arrangedViews[index-1], attribute: .trailing, multiplier: 1, constant: self.interItemSpacing)
                 self.addConstraint(constraint)
                 self.arrangedViewContraints.append(constraint)
             }
-            self.addConstraint(NSLayoutConstraint(item: view, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1, constant: 0))
+            self.addConstraint(NSLayoutConstraint(item: view, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1, constant: 0))
         }
     }
 }

ChattoAdditions/Source/Input/Photos/LiveCameraCaptureSession.swift

@@ -29,8 +29,8 @@ protocol LiveCameraCaptureSessionProtocol {
     var captureLayer: AVCaptureVideoPreviewLayer? { get }
     var isInitialized: Bool { get }
     var isCapturing: Bool { get }
-    func startCapturing(completion: () -> Void)
-    func stopCapturing(completion: () -> Void)
+    func startCapturing(_ completion: @escaping () -> Void)
+    func stopCapturing(_ completion: @escaping () -> Void)
 }
 
 class LiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
@@ -38,39 +38,39 @@ class LiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
     var isInitialized: Bool = false
 
     var isCapturing: Bool {
-        return self.isInitialized && self.captureSession?.running ?? false
+        return self.isInitialized && self.captureSession?.isRunning ?? false
     }
 
     deinit {
         var layer = self.captureLayer
         layer?.removeFromSuperlayer()
         var session: AVCaptureSession? = self.isInitialized ? self.captureSession : nil
-        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
+        DispatchQueue.global(qos: .default).async {
             // Analogously to AVCaptureSession creation, dealloc can take very long, so let's do it out of the main thread
             if layer != nil { layer = nil }
             if session != nil { session = nil }
         }
     }
 
-    func startCapturing(completion: () -> Void) {
-        let operation = NSBlockOperation()
+    func startCapturing(_ completion: @escaping () -> Void) {
+        let operation = BlockOperation()
         operation.addExecutionBlock { [weak operation, weak self] in
-            guard let sSelf = self, strongOperation = operation where !strongOperation.cancelled else { return }
+            guard let sSelf = self, let strongOperation = operation, !strongOperation.isCancelled else { return }
             sSelf.addInputDevicesIfNeeded()
             sSelf.captureSession?.startRunning()
-            dispatch_async(dispatch_get_main_queue(), completion)
+            DispatchQueue.main.async(execute: completion)
         }
         self.queue.cancelAllOperations()
         self.queue.addOperation(operation)
     }
 
-    func stopCapturing(completion: () -> Void) {
-        let operation = NSBlockOperation()
+    func stopCapturing(_ completion: @escaping () -> Void) {
+        let operation = BlockOperation()
         operation.addExecutionBlock { [weak operation, weak self] in
-            guard let sSelf = self, strongOperation = operation where !strongOperation.cancelled else { return }
+            guard let sSelf = self, let strongOperation = operation, !strongOperation.isCancelled else { return }
             sSelf.captureSession?.stopRunning()
             sSelf.removeInputDevices()
-            dispatch_async(dispatch_get_main_queue(), completion)
+            DispatchQueue.main.async(execute: completion)
         }
         self.queue.cancelAllOperations()
         self.queue.addOperation(operation)
@@ -78,17 +78,17 @@ class LiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
 
     private (set) var captureLayer: AVCaptureVideoPreviewLayer?
 
-    private lazy var queue: NSOperationQueue = {
-        let queue = NSOperationQueue()
-        queue.qualityOfService = .UserInitiated
+    private lazy var queue: OperationQueue = {
+        let queue = OperationQueue()
+        queue.qualityOfService = .userInitiated
         queue.maxConcurrentOperationCount = 1
         return queue
     }()
 
     private lazy var captureSession: AVCaptureSession? = {
-        assert(!NSThread.isMainThread(), "This can be very slow, make sure it happens in a background thread")
-
+        assert(!Thread.isMainThread, "This can be very slow, make sure it happens in a background thread")
         self.isInitialized = true
+
         #if !(arch(i386) || arch(x86_64))
             let session = AVCaptureSession()
             self.captureLayer = AVCaptureVideoPreviewLayer(session: session)
@@ -100,9 +100,9 @@ class LiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
     }()
 
     private func addInputDevicesIfNeeded() {
-        assert(!NSThread.isMainThread(), "This can be very slow, make sure it happens in a background thread")
+        assert(!Thread.isMainThread, "This can be very slow, make sure it happens in a background thread")
         if self.captureSession?.inputs?.count == 0 {
-            let device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
+            let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
             do {
                 let input = try AVCaptureDeviceInput(device: device)
                 self.captureSession?.addInput(input)
@@ -113,7 +113,7 @@ class LiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
     }
 
     private func removeInputDevices() {
-        assert(!NSThread.isMainThread(), "This can be very slow, make sure it happens in a background thread")
+        assert(!Thread.isMainThread, "This can be very slow, make sure it happens in a background thread")
         self.captureSession?.inputs?.forEach { (input) in
             self.captureSession?.removeInput(input as! AVCaptureInput)
         }

ChattoAdditions/Source/Input/Photos/LiveCameraCell.swift

@@ -32,8 +32,8 @@ public struct LiveCameraCellAppearance {
     public var cameraLockImageProvider: () -> UIImage?
 
     public init(backgroundColor: UIColor,
-                @autoclosure(escaping) cameraImage: () -> UIImage?,
-                @autoclosure(escaping) cameraLockImage: () -> UIImage?) {
+                cameraImage: @autoclosure @escaping () -> UIImage?,
+                cameraLockImage: @autoclosure @escaping () -> UIImage?) {
         self.backgroundColor = backgroundColor
         self.cameraImageProvider = cameraImage
         self.cameraLockImageProvider = cameraLockImage
@@ -42,8 +42,8 @@ public struct LiveCameraCellAppearance {
     public static func createDefaultAppearance() -> LiveCameraCellAppearance {
         return LiveCameraCellAppearance(
             backgroundColor: UIColor(red: 24.0/255.0, green: 101.0/255.0, blue: 245.0/255.0, alpha: 1),
-            cameraImage: UIImage(named: "camera", inBundle: NSBundle(forClass: LiveCameraCell.self), compatibleWithTraitCollection: nil),
-            cameraLockImage: UIImage(named: "camera_lock", inBundle: NSBundle(forClass: LiveCameraCell.self), compatibleWithTraitCollection: nil)
+            cameraImage: UIImage(named: "camera", in: Bundle(for: LiveCameraCell.self), compatibleWith: nil),
+            cameraLockImage: UIImage(named: "camera_lock", in: Bundle(for: LiveCameraCell.self), compatibleWith: nil)
         )
     }
 }
@@ -81,44 +81,44 @@ class LiveCameraCell: UICollectionViewCell {
                     self.contentView.layer.insertSublayer(captureLayer, below: self.iconImageView.layer)
                     let animation = CABasicAnimation.bma_fadeInAnimationWithDuration(0.25)
                     let animationKey = "fadeIn"
-                    captureLayer.removeAnimationForKey(animationKey)
-                    captureLayer.addAnimation(animation, forKey: animationKey)
+                    captureLayer.removeAnimation(forKey: animationKey)
+                    captureLayer.add(animation, forKey: animationKey)
                 }
                 self.setNeedsLayout()
             }
         }
     }
 
-    typealias CellCallback = (cell: LiveCameraCell) -> Void
+    typealias CellCallback = (_ cell: LiveCameraCell) -> Void
 
     var onWasAddedToWindow: CellCallback?
     var onWasRemovedFromWindow: CellCallback?
     override func didMoveToWindow() {
         if let _ = self.window {
-            self.onWasAddedToWindow?(cell: self)
+            self.onWasAddedToWindow?(self)
         } else {
-            self.onWasRemovedFromWindow?(cell: self)
+            self.onWasRemovedFromWindow?(self)
         }
     }
 
-    func updateWithAuthorizationStatus(status: AVAuthorizationStatus) {
+    func updateWithAuthorizationStatus(_ status: AVAuthorizationStatus) {
         self.authorizationStatus = status
         self.updateIcon()
     }
 
-    private var authorizationStatus: AVAuthorizationStatus = .NotDetermined
+    private var authorizationStatus: AVAuthorizationStatus = .notDetermined
 
     private func configureIcon() {
         self.iconImageView = UIImageView()
-        self.iconImageView.contentMode = .Center
+        self.iconImageView.contentMode = .center
         self.contentView.addSubview(self.iconImageView)
     }
 
     private func updateIcon() {
         switch self.authorizationStatus {
-        case .NotDetermined, .Authorized:
+        case .notDetermined, .authorized:
             self.iconImageView.image = self.appearance.cameraImageProvider()
-        case .Restricted, .Denied:
+        case .restricted, .denied:
             self.iconImageView.image = self.appearance.cameraLockImageProvider()
         }
         self.setNeedsLayout()

ChattoAdditions/Source/Input/Photos/LiveCameraCellPresenter.swift

@@ -29,19 +29,13 @@ public final class LiveCameraCellPresenter {
     private typealias Class = LiveCameraCellPresenter
     public typealias AVAuthorizationStatusProvider = () -> AVAuthorizationStatus
 
-
     private let cellAppearance: LiveCameraCellAppearance
     private let authorizationStatusProvider: () -> AVAuthorizationStatus
-    public init(cellAppearance: LiveCameraCellAppearance, authorizationStatusProvider: AVAuthorizationStatusProvider = LiveCameraCellPresenter.createDefaultCameraAuthorizationStatusProvider()) {
+    public init(cellAppearance: LiveCameraCellAppearance = LiveCameraCellAppearance.createDefaultAppearance(), authorizationStatusProvider: @escaping AVAuthorizationStatusProvider = LiveCameraCellPresenter.createDefaultCameraAuthorizationStatusProvider()) {
         self.cellAppearance = cellAppearance
         self.authorizationStatusProvider = authorizationStatusProvider
     }
 
-    public convenience init (cellAppearance: LiveCameraCellAppearance?, authorizationStatusProvider: AVAuthorizationStatusProvider = LiveCameraCellPresenter.createDefaultCameraAuthorizationStatusProvider()) {
-        let cellAppearance = cellAppearance ?? LiveCameraCellAppearance.createDefaultAppearance()
-        self.init(cellAppearance: cellAppearance, authorizationStatusProvider: authorizationStatusProvider)
-    }
-
     deinit {
         self.unsubscribeFromAppNotifications()
     }
@@ -49,21 +43,21 @@ public final class LiveCameraCellPresenter {
     private static let reuseIdentifier = "LiveCameraCell"
     private static func createDefaultCameraAuthorizationStatusProvider() -> AVAuthorizationStatusProvider {
         return {
-            return AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo)
+            return AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
         }
     }
 
-    public static func registerCells(collectionView collectionView: UICollectionView) {
-        collectionView.registerClass(LiveCameraCell.self, forCellWithReuseIdentifier: Class.reuseIdentifier)
+    public static func registerCells(collectionView: UICollectionView) {
+        collectionView.register(LiveCameraCell.self, forCellWithReuseIdentifier: Class.reuseIdentifier)
     }
 
-    public func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
-        return collectionView.dequeueReusableCellWithReuseIdentifier(Class.reuseIdentifier, forIndexPath: indexPath)
+    public func dequeueCell(collectionView: UICollectionView, indexPath: IndexPath) -> UICollectionViewCell {
+        return collectionView.dequeueReusableCell(withReuseIdentifier: Class.reuseIdentifier, for: indexPath)
     }
 
     private weak var cell: LiveCameraCell?
 
-    public func cellWillBeShown(cell: UICollectionViewCell) {
+    public func cellWillBeShown(_ cell: UICollectionViewCell) {
         guard let cell = cell as? LiveCameraCell else {
             assertionFailure("Invalid cell given to presenter")
             return
@@ -73,7 +67,7 @@ public final class LiveCameraCellPresenter {
         self.startCapturing()
     }
 
-    public func cellWasHidden(cell: UICollectionViewCell) {
+    public func cellWasHidden(_ cell: UICollectionViewCell) {
         guard let cell = cell as? LiveCameraCell else {
             assertionFailure("Invalid cell given to presenter")
             return
@@ -100,14 +94,14 @@ public final class LiveCameraCellPresenter {
         }
 
         cameraCell.onWasAddedToWindow = { [weak self] (cell) in
-            guard let sSelf = self where sSelf.cell === cell else { return }
+            guard let sSelf = self, sSelf.cell === cell else { return }
             if !sSelf.cameraPickerIsVisible {
                 sSelf.startCapturing()
             }
         }
 
         cameraCell.onWasRemovedFromWindow = { [weak self] (cell) in
-            guard let sSelf = self where sSelf.cell === cell else { return }
+            guard let sSelf = self, sSelf.cell === cell else { return }
             if !sSelf.cameraPickerIsVisible {
                 sSelf.stopCapturing()
             }
@@ -115,11 +109,11 @@ public final class LiveCameraCellPresenter {
     }
 
     // MARK: - App Notifications
-    lazy var notificationCenter = NSNotificationCenter.defaultCenter()
+    lazy var notificationCenter = NotificationCenter.default
 
     private func subscribeToAppNotifications() {
-        self.notificationCenter.addObserver(self, selector: #selector(LiveCameraCellPresenter.handleWillResignActiveNotification), name: UIApplicationWillResignActiveNotification, object: nil)
-        self.notificationCenter.addObserver(self, selector: #selector(LiveCameraCellPresenter.handleDidBecomeActiveNotification), name: UIApplicationDidBecomeActiveNotification, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(LiveCameraCellPresenter.handleWillResignActiveNotification), name: NSNotification.Name.UIApplicationWillResignActive, object: nil)
+        self.notificationCenter.addObserver(self, selector: #selector(LiveCameraCellPresenter.handleDidBecomeActiveNotification), name: NSNotification.Name.UIApplicationDidBecomeActive, object: nil)
     }
 
     private func unsubscribeFromAppNotifications() {
@@ -130,7 +124,7 @@ public final class LiveCameraCellPresenter {
 
     @objc
     private func handleWillResignActiveNotification() {
-        if self.captureSession.isCapturing ?? false {
+        if self.captureSession.isCapturing {
             self.needsRestoreCaptureSession = true
             self.stopCapturing()
         }
@@ -173,16 +167,16 @@ public final class LiveCameraCellPresenter {
 
     private var isCaptureAvailable: Bool {
         switch self.cameraAuthorizationStatus {
-        case .NotDetermined, .Restricted, .Denied:
+        case .notDetermined, .restricted, .denied:
             return false
-        case .Authorized:
+        case .authorized:
             return true
         }
     }
 
     lazy var captureSession: LiveCameraCaptureSessionProtocol = LiveCameraCaptureSession()
 
-    private var cameraAuthorizationStatus: AVAuthorizationStatus = .NotDetermined {
+    private var cameraAuthorizationStatus: AVAuthorizationStatus = .notDetermined {
         didSet {
             if self.isCaptureAvailable {
                 self.subscribeToAppNotifications()

ChattoAdditions/Source/Input/Photos/PhotosChatInputItem.swift

@@ -24,7 +24,7 @@
 
 import Foundation
 
-public class PhotosChatInputItem: ChatInputItemProtocol {
+open class PhotosChatInputItem: ChatInputItemProtocol {
     typealias Class = PhotosChatInputItem
 
     public var photoInputHandler: ((UIImage) -> Void)?
@@ -42,16 +42,16 @@ public class PhotosChatInputItem: ChatInputItemProtocol {
         self.inputViewAppearance = inputViewAppearance
     }
 
-    public class func createDefaultButtonAppearance() -> TabInputButtonAppearance {
+    public static func createDefaultButtonAppearance() -> TabInputButtonAppearance {
         let images: [UIControlStateWrapper: UIImage] = [
-            UIControlStateWrapper(state: .Normal): UIImage(named: "camera-icon-unselected", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            UIControlStateWrapper(state: .Selected): UIImage(named: "camera-icon-selected", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!,
-            UIControlStateWrapper(state: .Highlighted): UIImage(named: "camera-icon-selected", inBundle: NSBundle(forClass: Class.self), compatibleWithTraitCollection: nil)!
+            UIControlStateWrapper(state: .normal): UIImage(named: "camera-icon-unselected", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            UIControlStateWrapper(state: .selected): UIImage(named: "camera-icon-selected", in: Bundle(for: Class.self), compatibleWith: nil)!,
+            UIControlStateWrapper(state: .highlighted): UIImage(named: "camera-icon-selected", in: Bundle(for: Class.self), compatibleWith: nil)!
         ]
         return TabInputButtonAppearance(images: images, size: nil)
     }
 
-    public class func createDefaultInputViewAppearance() -> PhotosInputViewAppearance {
+    public static func createDefaultInputViewAppearance() -> PhotosInputViewAppearance {
         return PhotosInputViewAppearance(liveCameraCellAppearence: LiveCameraCellAppearance.createDefaultAppearance())
     }
 
@@ -65,31 +65,31 @@ public class PhotosChatInputItem: ChatInputItemProtocol {
         return photosInputView
     }()
 
-    public var selected = false {
+    open var selected = false {
         didSet {
-            self.internalTabView.selected = self.selected
+            self.internalTabView.isSelected = self.selected
         }
     }
 
     // MARK: - ChatInputItemProtocol
 
-    public var presentationMode: ChatInputItemPresentationMode {
-        return .CustomView
+    open var presentationMode: ChatInputItemPresentationMode {
+        return .customView
     }
 
-    public var showsSendButton: Bool {
+    open var showsSendButton: Bool {
         return false
     }
 
-    public var inputView: UIView? {
+    open var inputView: UIView? {
         return self.photosInputView as? UIView
     }
 
-    public var tabView: UIView {
+    open var tabView: UIView {
         return self.internalTabView
     }
 
-    public func handleInput(input: AnyObject) {
+    open func handleInput(_ input: AnyObject) {
         if let image = input as? UIImage {
             self.photoInputHandler?(image)
         }
@@ -98,15 +98,15 @@ public class PhotosChatInputItem: ChatInputItemProtocol {
 
 // MARK: - PhotosInputViewDelegate
 extension PhotosChatInputItem: PhotosInputViewDelegate {
-    func inputView(inputView: PhotosInputViewProtocol, didSelectImage image: UIImage) {
+    func inputView(_ inputView: PhotosInputViewProtocol, didSelectImage image: UIImage) {
         self.photoInputHandler?(image)
     }
 
-    func inputViewDidRequestCameraPermission(inputView: PhotosInputViewProtocol) {
+    func inputViewDidRequestCameraPermission(_ inputView: PhotosInputViewProtocol) {
         self.cameraPermissionHandler?()
     }
 
-    func inputViewDidRequestPhotoLibraryPermission(inputView: PhotosInputViewProtocol) {
+    func inputViewDidRequestPhotoLibraryPermission(_ inputView: PhotosInputViewProtocol) {
         self.photosPermissionHandler?()
     }
 }

ChattoAdditions/Source/Input/Photos/PhotosInputCameraPicker.swift

@@ -32,8 +32,8 @@ class PhotosInputCameraPicker: NSObject {
 
     private var completionBlocks: (onImageTaken: ((UIImage?) -> Void)?, onCameraPickerDismissed: (() -> Void)?)?
 
-    func presentCameraPicker(onImageTaken onImageTaken: (UIImage?) -> Void, onCameraPickerDismissed: () -> Void) {
-        guard UIImagePickerController.isSourceTypeAvailable(.Camera) else {
+    func presentCameraPicker(onImageTaken: @escaping (UIImage?) -> Void, onCameraPickerDismissed: @escaping () -> Void) {
+        guard UIImagePickerController.isSourceTypeAvailable(.camera) else {
             onImageTaken(nil)
             onCameraPickerDismissed()
             return
@@ -49,23 +49,23 @@ class PhotosInputCameraPicker: NSObject {
         self.completionBlocks = (onImageTaken: onImageTaken, onCameraPickerDismissed: onCameraPickerDismissed)
         let controller = UIImagePickerController()
         controller.delegate = self
-        controller.sourceType = .Camera
-        presentingController.presentViewController(controller, animated: true, completion:nil)
+        controller.sourceType = .camera
+        presentingController.present(controller, animated: true, completion:nil)
     }
 
-    private func finishPickingImage(image: UIImage?, fromPicker picker: UIImagePickerController) {
+    fileprivate func finishPickingImage(_ image: UIImage?, fromPicker picker: UIImagePickerController) {
         let (onImageTaken, onCameraPickerDismissed) = self.completionBlocks ?? (nil, nil)
-        picker.dismissViewControllerAnimated(true, completion: onCameraPickerDismissed)
+        picker.dismiss(animated: true, completion: onCameraPickerDismissed)
         onImageTaken?(image)
     }
 }
 
 extension PhotosInputCameraPicker: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
-    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
+    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
         self.finishPickingImage(image, fromPicker: picker)
     }
 
-    func imagePickerControllerDidCancel(picker: UIImagePickerController) {
+    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
         self.finishPickingImage(nil, fromPicker: picker)
     }
 }

ChattoAdditions/Source/Input/Photos/PhotosInputCell.swift

@@ -44,8 +44,8 @@ class PhotosInputPlaceholderCell: UICollectionViewCell {
     private var imageView: UIImageView!
     private func commonInit() {
         self.imageView = UIImageView()
-        self.imageView.contentMode = .Center
-        self.imageView.image = UIImage(named: Constants.imageName, inBundle: NSBundle(forClass: PhotosInputPlaceholderCell.self), compatibleWithTraitCollection: nil)
+        self.imageView.contentMode = .center
+        self.imageView.image = UIImage(named: Constants.imageName, in: Bundle(for: PhotosInputPlaceholderCell.self), compatibleWith: nil)
         self.contentView.addSubview(self.imageView)
         self.contentView.backgroundColor = Constants.backgroundColor
     }
@@ -77,7 +77,7 @@ class PhotosInputCell: UICollectionViewCell {
     private func commonInit() {
         self.clipsToBounds = true
         self.imageView = UIImageView()
-        self.imageView.contentMode = .ScaleAspectFill
+        self.imageView.contentMode = .scaleAspectFill
         self.contentView.addSubview(self.imageView)
         self.contentView.backgroundColor = Constants.backgroundColor
     }

ChattoAdditions/Source/Input/Photos/PhotosInputCellProvider.swift

@@ -25,7 +25,7 @@
 import UIKit
 
 protocol PhotosInputCellProviderProtocol {
-    func cellForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewCell
+    func cellForItemAtIndexPath(_ indexPath: IndexPath) -> UICollectionViewCell
 }
 
 class PhotosInputPlaceholderCellProvider: PhotosInputCellProviderProtocol {
@@ -33,11 +33,11 @@ class PhotosInputPlaceholderCellProvider: PhotosInputCellProviderProtocol {
     private let collectionView: UICollectionView
     init(collectionView: UICollectionView) {
         self.collectionView = collectionView
-        self.collectionView.registerClass(PhotosInputPlaceholderCell.self, forCellWithReuseIdentifier: self.reuseIdentifier)
+        self.collectionView.register(PhotosInputPlaceholderCell.self, forCellWithReuseIdentifier: self.reuseIdentifier)
     }
 
-    func cellForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewCell {
-        return self.collectionView.dequeueReusableCellWithReuseIdentifier(self.reuseIdentifier, forIndexPath: indexPath)
+    func cellForItemAtIndexPath(_ indexPath: IndexPath) -> UICollectionViewCell {
+        return self.collectionView.dequeueReusableCell(withReuseIdentifier: self.reuseIdentifier, for: indexPath)
     }
 }
 
@@ -48,20 +48,20 @@ class PhotosInputCellProvider: PhotosInputCellProviderProtocol {
     init(collectionView: UICollectionView, dataProvider: PhotosInputDataProviderProtocol) {
         self.dataProvider = dataProvider
         self.collectionView = collectionView
-        self.collectionView.registerClass(PhotosInputCell.self, forCellWithReuseIdentifier: self.reuseIdentifier)
+        self.collectionView.register(PhotosInputCell.self, forCellWithReuseIdentifier: self.reuseIdentifier)
     }
 
-    func cellForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewCell {
-        let cell = self.collectionView.dequeueReusableCellWithReuseIdentifier(self.reuseIdentifier, forIndexPath: indexPath) as! PhotosInputCell
+    func cellForItemAtIndexPath(_ indexPath: IndexPath) -> UICollectionViewCell {
+        let cell = self.collectionView.dequeueReusableCell(withReuseIdentifier: self.reuseIdentifier, for: indexPath) as! PhotosInputCell
         self.configureCell(cell, atIndexPath: indexPath)
         return cell
     }
 
-    private let previewRequests = NSMapTable.weakToStrongObjectsMapTable()
-    private func configureCell(cell: PhotosInputCell, atIndexPath indexPath: NSIndexPath) {
-        if let requestID = self.previewRequests.objectForKey(cell) as? NSNumber {
-            self.previewRequests.removeObjectForKey(cell)
-            self.dataProvider.cancelPreviewImageRequest(requestID.intValue)
+    private let previewRequests = NSMapTable<PhotosInputCell, NSNumber>.weakToStrongObjects()
+    private func configureCell(_ cell: PhotosInputCell, atIndexPath indexPath: IndexPath) {
+        if let requestID = self.previewRequests.object(forKey: cell) {
+            self.previewRequests.removeObject(forKey: cell)
+            self.dataProvider.cancelPreviewImageRequest(requestID.int32Value)
         }
 
         let index = indexPath.item - 1
@@ -69,17 +69,17 @@ class PhotosInputCellProvider: PhotosInputCellProviderProtocol {
         var imageProvidedSynchronously = true
         var requestID: Int32 = -1
         requestID = self.dataProvider.requestPreviewImageAtIndex(index, targetSize: targetSize) { [weak self, weak cell] image in
-            guard let sSelf = self, sCell = cell else { return }
+            guard let sSelf = self, let sCell = cell else { return }
             // We can get here even afer calling cancelPreviewImageRequest (looks liek a race condition in PHImageManager)
             // Also, according to PHImageManager's documentation, this block can be called several times: we may receive an image with a low quality and then receive an update with a better one
             // This can also be called before returning from requestPreviewImageAtIndex (synchronously) if the image is cached by PHImageManager
-            let imageIsForThisCell = imageProvidedSynchronously || (sSelf.previewRequests.objectForKey(sCell) as? NSNumber)?.intValue == requestID
+            let imageIsForThisCell = imageProvidedSynchronously || sSelf.previewRequests.object(forKey: sCell)?.int32Value == requestID
             if imageIsForThisCell {
                 sCell.image = image
             }
         }
         imageProvidedSynchronously = false
 
-        self.previewRequests.setObject(NSNumber(int: requestID), forKey:cell)
+        self.previewRequests.setObject(NSNumber(value: requestID), forKey:cell)
     }
 }

ChattoAdditions/Source/Input/Photos/PhotosInputDataProvider.swift

@@ -25,15 +25,15 @@
 import PhotosUI
 
 protocol PhotosInputDataProviderDelegate: class {
-    func handlePhotosInpudDataProviderUpdate(dataProvider: PhotosInputDataProviderProtocol, updateBlock: () -> Void)
+    func handlePhotosInpudDataProviderUpdate(_ dataProvider: PhotosInputDataProviderProtocol, updateBlock: @escaping () -> Void)
 }
 
 protocol PhotosInputDataProviderProtocol {
     weak var delegate: PhotosInputDataProviderDelegate? { get set }
     var count: Int { get }
-    func requestPreviewImageAtIndex(index: Int, targetSize: CGSize, completion: (UIImage) -> Void) -> Int32
-    func requestFullImageAtIndex(index: Int, completion: (UIImage) -> Void)
-    func cancelPreviewImageRequest(requestID: Int32)
+    func requestPreviewImageAtIndex(_ index: Int, targetSize: CGSize, completion: @escaping (UIImage) -> Void) -> Int32
+    func requestFullImageAtIndex(_ index: Int, completion: @escaping (UIImage) -> Void)
+    func cancelPreviewImageRequest(_ requestID: Int32)
 }
 
 class PhotosInputPlaceholderDataProvider: PhotosInputDataProviderProtocol {
@@ -49,14 +49,14 @@ class PhotosInputPlaceholderDataProvider: PhotosInputDataProviderProtocol {
         return self.numberOfPlaceholders
     }
 
-    func requestPreviewImageAtIndex(index: Int, targetSize: CGSize, completion: (UIImage) -> Void) -> Int32 {
+    func requestPreviewImageAtIndex(_ index: Int, targetSize: CGSize, completion: @escaping (UIImage) -> Void) -> Int32 {
         return 0
     }
 
-    func requestFullImageAtIndex(index: Int, completion: (UIImage) -> Void) {
+    func requestFullImageAtIndex(_ index: Int, completion: @escaping (UIImage) -> Void) {
     }
 
-    func cancelPreviewImageRequest(requestID: Int32) {
+    func cancelPreviewImageRequest(_ requestID: Int32) {
     }
 }
 
@@ -64,52 +64,52 @@ class PhotosInputPlaceholderDataProvider: PhotosInputDataProviderProtocol {
 class PhotosInputDataProvider: NSObject, PhotosInputDataProviderProtocol, PHPhotoLibraryChangeObserver {
     weak var delegate: PhotosInputDataProviderDelegate?
     private var imageManager = PHCachingImageManager()
-    private var fetchResult: PHFetchResult!
+    private var fetchResult: PHFetchResult<PHAsset>!
     override init() {
-        func fetchOptions(predicate: NSPredicate?) -> PHFetchOptions {
+        func fetchOptions(_ predicate: NSPredicate?) -> PHFetchOptions {
             let options = PHFetchOptions()
             options.sortDescriptors = [ NSSortDescriptor(key: "creationDate", ascending: false) ]
             options.predicate = predicate
             return options
         }
 
-        if let userLibraryCollection = PHAssetCollection.fetchAssetCollectionsWithType(.SmartAlbum, subtype: .SmartAlbumUserLibrary, options: nil).firstObject as? PHAssetCollection {
-            self.fetchResult = PHAsset.fetchAssetsInAssetCollection(userLibraryCollection, options: fetchOptions(NSPredicate(format: "mediaType = \(PHAssetMediaType.Image.rawValue)")))
+        if let userLibraryCollection = PHAssetCollection.fetchAssetCollections(with: .smartAlbum, subtype: .smartAlbumUserLibrary, options: nil).firstObject {
+            self.fetchResult = PHAsset.fetchAssets(in: userLibraryCollection, options: fetchOptions(NSPredicate(format: "mediaType = \(PHAssetMediaType.image.rawValue)")))
         } else {
-            self.fetchResult = PHAsset.fetchAssetsWithMediaType(.Image, options: fetchOptions(nil))
+            self.fetchResult = PHAsset.fetchAssets(with: .image, options: fetchOptions(nil))
         }
         super.init()
-        PHPhotoLibrary.sharedPhotoLibrary().registerChangeObserver(self)
+        PHPhotoLibrary.shared().register(self)
     }
 
     deinit {
-        PHPhotoLibrary.sharedPhotoLibrary().unregisterChangeObserver(self)
+        PHPhotoLibrary.shared().unregisterChangeObserver(self)
     }
 
     var count: Int {
         return self.fetchResult.count
     }
 
-    func requestPreviewImageAtIndex(index: Int, targetSize: CGSize, completion: (UIImage) -> Void) -> Int32 {
+    func requestPreviewImageAtIndex(_ index: Int, targetSize: CGSize, completion: @escaping (UIImage) -> Void) -> Int32 {
         assert(index >= 0 && index < self.fetchResult.count, "Index out of bounds")
-        let asset = self.fetchResult[index] as! PHAsset
+        let asset = self.fetchResult[index]
         let options = PHImageRequestOptions()
-        options.deliveryMode = .HighQualityFormat
-        return self.imageManager.requestImageForAsset(asset, targetSize: targetSize, contentMode: .AspectFill, options: options) { (image, info) in
+        options.deliveryMode = .highQualityFormat
+        return self.imageManager.requestImage(for: asset, targetSize: targetSize, contentMode: .aspectFill, options: options) { (image, info) in
             if let image = image {
                 completion(image)
             }
         }
     }
 
-    func cancelPreviewImageRequest(requestID: Int32) {
+    func cancelPreviewImageRequest(_ requestID: Int32) {
         self.imageManager.cancelImageRequest(requestID)
     }
 
-    func requestFullImageAtIndex(index: Int, completion: (UIImage) -> Void) {
+    func requestFullImageAtIndex(_ index: Int, completion: @escaping (UIImage) -> Void) {
         assert(index >= 0 && index < self.fetchResult.count, "Index out of bounds")
-        let asset = self.fetchResult[index] as! PHAsset
-        self.imageManager.requestImageDataForAsset(asset, options: .None) { (data, dataUTI, orientation, info) -> Void in
+        let asset = self.fetchResult[index]
+        self.imageManager.requestImageData(for: asset, options: .none) { (data, dataUTI, orientation, info) -> Void in
             if let data = data, let image = UIImage(data: data) {
                 completion(image)
             }
@@ -118,14 +118,14 @@ class PhotosInputDataProvider: NSObject, PhotosInputDataProviderProtocol, PHPhot
 
     // MARK: PHPhotoLibraryChangeObserver
 
-    func photoLibraryDidChange(changeInstance: PHChange) {
+    func photoLibraryDidChange(_ changeInstance: PHChange) {
         // Photos may call this method on a background queue; switch to the main queue to update the UI.
-        dispatch_async(dispatch_get_main_queue()) { [weak self]  in
+        DispatchQueue.main.async { [weak self]  in
             guard let sSelf = self else { return }
 
-            if let changeDetails = changeInstance.changeDetailsForFetchResult(sSelf.fetchResult) {
+            if let changeDetails = changeInstance.changeDetails(for: sSelf.fetchResult as! PHFetchResult<PHObject>) {
                 let updateBlock = { () -> Void in
-                    self?.fetchResult = changeDetails.fetchResultAfterChanges
+                    self?.fetchResult = changeDetails.fetchResultAfterChanges as! PHFetchResult<PHAsset>
                 }
                 sSelf.delegate?.handlePhotosInpudDataProviderUpdate(sSelf, updateBlock: updateBlock)
             }
@@ -148,7 +148,7 @@ class PhotosInputWithPlaceholdersDataProvider: PhotosInputDataProviderProtocol,
         return max(self.photosDataProvider.count, self.placeholdersDataProvider.count)
     }
 
-    func requestPreviewImageAtIndex(index: Int, targetSize: CGSize, completion: (UIImage) -> Void) -> Int32 {
+    func requestPreviewImageAtIndex(_ index: Int, targetSize: CGSize, completion: @escaping (UIImage) -> Void) -> Int32 {
         if index < self.photosDataProvider.count {
             return self.photosDataProvider.requestPreviewImageAtIndex(index, targetSize: targetSize, completion: completion)
         } else {
@@ -156,7 +156,7 @@ class PhotosInputWithPlaceholdersDataProvider: PhotosInputDataProviderProtocol,
         }
     }
 
-    func requestFullImageAtIndex(index: Int, completion: (UIImage) -> Void) {
+    func requestFullImageAtIndex(_ index: Int, completion: @escaping (UIImage) -> Void) {
         if index < self.photosDataProvider.count {
             return self.photosDataProvider.requestFullImageAtIndex(index, completion: completion)
         } else {
@@ -164,13 +164,13 @@ class PhotosInputWithPlaceholdersDataProvider: PhotosInputDataProviderProtocol,
         }
     }
 
-    func cancelPreviewImageRequest(requestID: Int32) {
+    func cancelPreviewImageRequest(_ requestID: Int32) {
         return self.photosDataProvider.cancelPreviewImageRequest(requestID)
     }
 
     // MARK: PhotosInputDataProviderDelegate
 
-    func handlePhotosInpudDataProviderUpdate(dataProvider: PhotosInputDataProviderProtocol, updateBlock: () -> Void) {
+    func handlePhotosInpudDataProviderUpdate(_ dataProvider: PhotosInputDataProviderProtocol, updateBlock: @escaping () -> Void) {
         self.delegate?.handlePhotosInpudDataProviderUpdate(self, updateBlock: updateBlock)
     }
 }

ChattoAdditions/Source/Input/Photos/PhotosInputView.swift

@@ -39,26 +39,26 @@ protocol PhotosInputViewProtocol {
 }
 
 protocol PhotosInputViewDelegate: class {
-    func inputView(inputView: PhotosInputViewProtocol, didSelectImage image: UIImage)
-    func inputViewDidRequestCameraPermission(inputView: PhotosInputViewProtocol)
-    func inputViewDidRequestPhotoLibraryPermission(inputView: PhotosInputViewProtocol)
+    func inputView(_ inputView: PhotosInputViewProtocol, didSelectImage image: UIImage)
+    func inputViewDidRequestCameraPermission(_ inputView: PhotosInputViewProtocol)
+    func inputViewDidRequestPhotoLibraryPermission(_ inputView: PhotosInputViewProtocol)
 }
 
 class PhotosInputView: UIView, PhotosInputViewProtocol {
 
-    private struct Constants {
+    fileprivate struct Constants {
         static let liveCameraItemIndex = 0
     }
 
-    private lazy var collectionViewQueue = SerialTaskQueue()
-    private var collectionView: UICollectionView!
-    private var collectionViewLayout: UICollectionViewFlowLayout!
-    private var dataProvider: PhotosInputDataProviderProtocol!
-    private var cellProvider: PhotosInputCellProviderProtocol!
-    private var itemSizeCalculator: PhotosInputViewItemSizeCalculator!
+    fileprivate lazy var collectionViewQueue = SerialTaskQueue()
+    fileprivate var collectionView: UICollectionView!
+    fileprivate var collectionViewLayout: UICollectionViewFlowLayout!
+    fileprivate var dataProvider: PhotosInputDataProviderProtocol!
+    fileprivate var cellProvider: PhotosInputCellProviderProtocol!
+    fileprivate var itemSizeCalculator: PhotosInputViewItemSizeCalculator!
 
     var cameraAuthorizationStatus: AVAuthorizationStatus {
-        return AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo)
+        return AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
     }
 
     var photoLibraryAuthorizationStatus: PHAuthorizationStatus {
@@ -91,7 +91,7 @@ class PhotosInputView: UIView, PhotosInputViewProtocol {
     }
 
     private func commonInit() {
-        self.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
+        self.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         self.configureCollectionView()
         self.configureItemSizeCalculator()
         self.dataProvider = PhotosInputPlaceholderDataProvider()
@@ -108,10 +108,10 @@ class PhotosInputView: UIView, PhotosInputViewProtocol {
     }
 
     private func requestAccessToVideo() {
-        guard self.cameraAuthorizationStatus != .Authorized else { return }
+        guard self.cameraAuthorizationStatus != .authorized else { return }
 
-        AVCaptureDevice.requestAccessForMediaType(AVMediaTypeVideo) { (success) -> Void in
-            dispatch_async(dispatch_get_main_queue(), { () -> Void in
+        AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo) { (success) -> Void in
+            DispatchQueue.main.async(execute: { () -> Void in
                 self.reloadVideoItem()
             })
         }
@@ -122,22 +122,22 @@ class PhotosInputView: UIView, PhotosInputViewProtocol {
             guard let sSelf = self else { return }
 
             sSelf.collectionView.performBatchUpdates({
-                sSelf.collectionView.reloadItemsAtIndexPaths([NSIndexPath(forItem: Constants.liveCameraItemIndex, inSection: 0)])
+                sSelf.collectionView.reloadItems(at: [IndexPath(item: Constants.liveCameraItemIndex, section: 0)])
             }, completion: { (finished) in
-                dispatch_async(dispatch_get_main_queue(), completion)
+                DispatchQueue.main.async(execute: completion)
             })
         }
     }
 
     private func requestAccessToPhoto() {
-        guard self.photoLibraryAuthorizationStatus != .Authorized else {
+        guard self.photoLibraryAuthorizationStatus != .authorized else {
             self.replacePlaceholderItemsWithPhotoItems()
             return
         }
 
         PHPhotoLibrary.requestAuthorization { (status: PHAuthorizationStatus) -> Void in
-            if status == PHAuthorizationStatus.Authorized {
-                dispatch_async(dispatch_get_main_queue(), { () -> Void in
+            if status == PHAuthorizationStatus.authorized {
+                DispatchQueue.main.async(execute: { () -> Void in
                     self.replacePlaceholderItemsWithPhotoItems()
                 })
             }
@@ -153,23 +153,23 @@ class PhotosInputView: UIView, PhotosInputViewProtocol {
             sSelf.dataProvider = newDataProvider
             sSelf.cellProvider = PhotosInputCellProvider(collectionView: sSelf.collectionView, dataProvider: newDataProvider)
             sSelf.collectionView.reloadData()
-            dispatch_async(dispatch_get_main_queue(), completion)
+            DispatchQueue.main.async(execute: completion)
         }
     }
 
     func reload() {
         self.collectionViewQueue.addTask { [weak self] (completion) in
             self?.collectionView.reloadData()
-            dispatch_async(dispatch_get_main_queue(), completion)
+            DispatchQueue.main.async(execute: completion)
         }
     }
 
-    private lazy var cameraPicker: PhotosInputCameraPicker = {
+    fileprivate lazy var cameraPicker: PhotosInputCameraPicker = {
         return PhotosInputCameraPicker(presentingController: self.presentingController)
     }()
 
-    private lazy var liveCameraPresenter: LiveCameraCellPresenter = {
-        return LiveCameraCellPresenter(cellAppearance: self.appearance?.liveCameraCellAppearence)
+    fileprivate lazy var liveCameraPresenter: LiveCameraCellPresenter = {
+        return LiveCameraCellPresenter(cellAppearance: self.appearance?.liveCameraCellAppearence ?? LiveCameraCellAppearance.createDefaultAppearance())
     }()
 }
 
@@ -178,7 +178,7 @@ extension PhotosInputView: UICollectionViewDataSource {
     func configureCollectionView() {
         self.collectionViewLayout = PhotosInputCollectionViewLayout()
         self.collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: self.collectionViewLayout)
-        self.collectionView.backgroundColor = UIColor.whiteColor()
+        self.collectionView.backgroundColor = UIColor.white
         self.collectionView.translatesAutoresizingMaskIntoConstraints = false
         LiveCameraCellPresenter.registerCells(collectionView: self.collectionView)
 
@@ -186,17 +186,17 @@ extension PhotosInputView: UICollectionViewDataSource {
         self.collectionView.delegate = self
 
         self.addSubview(self.collectionView)
-        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .Leading, relatedBy: .Equal, toItem: self, attribute: .Leading, multiplier: 1, constant: 0))
-        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .Trailing, relatedBy: .Equal, toItem: self, attribute: .Trailing, multiplier: 1, constant: 0))
-        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .Top, relatedBy: .Equal, toItem: self, attribute: .Top, multiplier: 1, constant: 0))
-        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .Bottom, relatedBy: .Equal, toItem: self, attribute: .Bottom, multiplier: 1, constant: 0))
+        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .leading, relatedBy: .equal, toItem: self, attribute: .leading, multiplier: 1, constant: 0))
+        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .trailing, relatedBy: .equal, toItem: self, attribute: .trailing, multiplier: 1, constant: 0))
+        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .top, relatedBy: .equal, toItem: self, attribute: .top, multiplier: 1, constant: 0))
+        self.addConstraint(NSLayoutConstraint(item: self.collectionView, attribute: .bottom, relatedBy: .equal, toItem: self, attribute: .bottom, multiplier: 1, constant: 0))
     }
 
-    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
         return self.dataProvider.count + 1
     }
 
-    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
+    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
         var cell: UICollectionViewCell
         if indexPath.item == Constants.liveCameraItemIndex {
             cell = self.liveCameraPresenter.dequeueCell(collectionView: collectionView, indexPath: indexPath)
@@ -208,9 +208,9 @@ extension PhotosInputView: UICollectionViewDataSource {
 }
 
 extension PhotosInputView: UICollectionViewDelegateFlowLayout {
-    func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
+    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         if indexPath.item == Constants.liveCameraItemIndex {
-            if self.cameraAuthorizationStatus != .Authorized {
+            if self.cameraAuthorizationStatus != .authorized {
                 self.delegate?.inputViewDidRequestCameraPermission(self)
             } else {
                 self.liveCameraPresenter.cameraPickerWillAppear()
@@ -225,7 +225,7 @@ extension PhotosInputView: UICollectionViewDelegateFlowLayout {
                 })
             }
         } else {
-            if self.photoLibraryAuthorizationStatus != .Authorized {
+            if self.photoLibraryAuthorizationStatus != .authorized {
                 self.delegate?.inputViewDidRequestPhotoLibraryPermission(self)
             } else {
                 self.dataProvider.requestFullImageAtIndex(indexPath.item - 1) { image in
@@ -235,25 +235,25 @@ extension PhotosInputView: UICollectionViewDelegateFlowLayout {
         }
     }
 
-    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
         return self.itemSizeCalculator.itemSizeForWidth(collectionView.bounds.width, atIndex: indexPath.item)
     }
 
-    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAtIndex section: Int) -> CGFloat {
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
         return self.itemSizeCalculator.interitemSpace
     }
 
-    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAtIndex section: Int) -> CGFloat {
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
         return self.itemSizeCalculator.interitemSpace
     }
 
-    func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
+    func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
         if indexPath.item == Constants.liveCameraItemIndex {
             self.liveCameraPresenter.cellWillBeShown(cell)
         }
     }
 
-    func collectionView(collectionView: UICollectionView, didEndDisplayingCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
+    func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
         if indexPath.item == Constants.liveCameraItemIndex {
             self.liveCameraPresenter.cellWasHidden(cell)
         }
@@ -261,20 +261,20 @@ extension PhotosInputView: UICollectionViewDelegateFlowLayout {
 }
 
 extension PhotosInputView: PhotosInputDataProviderDelegate {
-    func handlePhotosInpudDataProviderUpdate(dataProvider: PhotosInputDataProviderProtocol, updateBlock: () -> Void) {
+    func handlePhotosInpudDataProviderUpdate(_ dataProvider: PhotosInputDataProviderProtocol, updateBlock: @escaping () -> Void) {
         self.collectionViewQueue.addTask { [weak self] (completion) in
             guard let sSelf = self else { return }
 
             updateBlock()
             sSelf.collectionView.reloadData()
-            dispatch_async(dispatch_get_main_queue(), completion)
+            DispatchQueue.main.async(execute: completion)
         }
     }
 
 }
 
 private class PhotosInputCollectionViewLayout: UICollectionViewFlowLayout {
-    private override func shouldInvalidateLayoutForBoundsChange(newBounds: CGRect) -> Bool {
+    override func shouldInvalidateLayout(forBoundsChange newBounds: CGRect) -> Bool {
         return newBounds.width != self.collectionView?.bounds.width
     }
 }

ChattoAdditions/Source/Input/Photos/PhotosInputViewItemSizeCalculator.swift

@@ -26,7 +26,7 @@ struct PhotosInputViewItemSizeCalculator {
     var itemsPerRow: Int = 0
     var interitemSpace: CGFloat = 0
 
-    func itemSizeForWidth(width: CGFloat, atIndex index: Int) -> CGSize {
+    func itemSizeForWidth(_ width: CGFloat, atIndex index: Int) -> CGSize {
         let availableWidth = width - self.interitemSpace * CGFloat((self.itemsPerRow - 1))
         if availableWidth <= 0 {
             return CGSize.zero

ChattoAdditions/Source/Input/ReusableXibView.swift

@@ -24,22 +24,22 @@
 
 import UIKit
 
-@objc public class ReusableXibView: UIView {
+@objc open class ReusableXibView: UIView {
 
     func loadViewFromNib() -> UIView {
-        let bundle = NSBundle(forClass: self.dynamicType)
-        let nib = UINib(nibName:self.dynamicType.nibName(), bundle: bundle)
-        let view = nib.instantiateWithOwner(nil, options: nil).first as! UIView
+        let bundle = Bundle(for: type(of: self))
+        let nib = UINib(nibName:type(of: self).nibName(), bundle: bundle)
+        let view = nib.instantiate(withOwner: nil, options: nil).first as! UIView
         return view
     }
 
-    override public func awakeAfterUsingCoder(aDecoder: NSCoder) -> AnyObject? {
+    override open func awakeAfter(using aDecoder: NSCoder) -> Any? {
         if self.subviews.count > 0 {
             return self
         }
 
-        let bundle = NSBundle(forClass: self.dynamicType)
-        if let loadedView = bundle.loadNibNamed(self.dynamicType.nibName(), owner: nil, options: nil)?.first as? UIView {
+        let bundle = Bundle(for: type(of: self))
+        if let loadedView = bundle.loadNibNamed(type(of: self).nibName(), owner: nil, options: nil)?.first as? UIView {
             loadedView.frame = frame
             loadedView.autoresizingMask = autoresizingMask
             loadedView.translatesAutoresizingMaskIntoConstraints = translatesAutoresizingMaskIntoConstraints

ChattoAdditions/Source/Input/TabInputButton.swift

@@ -38,10 +38,10 @@ public class TabInputButton: UIButton {
 
     static public func makeInputButton(withAppearance appearance: TabInputButtonAppearance, accessibilityID: String? = nil) -> TabInputButton {
         let images = appearance.images
-        let button = TabInputButton(type: .Custom)
-        button.exclusiveTouch = true
+        let button = TabInputButton(type: .custom)
+        button.isExclusiveTouch = true
         images.forEach { (state, image) in
-            button.setImage(image, forState: state.controlState)
+            button.setImage(image, for: state.controlState)
         }
         if let accessibilityIdentifier = accessibilityID {
             button.accessibilityIdentifier = accessibilityIdentifier
@@ -52,10 +52,10 @@ public class TabInputButton: UIButton {
 
     private var size: CGSize?
 
-    public override func intrinsicContentSize() -> CGSize {
+    public override var intrinsicContentSize: CGSize {
         if let size = self.size {
             return size
         }
-        return super.intrinsicContentSize()
+        return super.intrinsicContentSize
     }
 }

ChattoAdditions/Source/Input/Text/TextChatInputItem.swift

@@ -24,7 +24,7 @@
 
 import Foundation
 
-public class TextChatInputItem {
+open class TextChatInputItem {
     typealias Class = TextChatInputItem
     public var textInputHandler: ((String) -> Void)?
 
@@ -33,22 +33,22 @@ public class TextChatInputItem {
         self.buttonAppearance = tabInputButtonAppearance
     }
 
-    public class func createDefaultButtonAppearance() -> TabInputButtonAppearance {
+    public static func createDefaultButtonAppearance() -> TabInputButtonAppearance {
         let images: [UIControlStateWrapper: UIImage] = [
-            UIControlStateWrapper(state: .Normal): UIImage(named: "text-icon-unselected", inBundle: NSBundle(forClass: TextChatInputItem.self), compatibleWithTraitCollection: nil)!,
-            UIControlStateWrapper(state: .Selected): UIImage(named: "text-icon-selected", inBundle: NSBundle(forClass: TextChatInputItem.self), compatibleWithTraitCollection: nil)!,
-            UIControlStateWrapper(state: .Highlighted): UIImage(named: "text-icon-selected", inBundle: NSBundle(forClass: TextChatInputItem.self), compatibleWithTraitCollection: nil)!
+            UIControlStateWrapper(state: .normal): UIImage(named: "text-icon-unselected", in: Bundle(for: TextChatInputItem.self), compatibleWith: nil)!,
+            UIControlStateWrapper(state: .selected): UIImage(named: "text-icon-selected", in: Bundle(for: TextChatInputItem.self), compatibleWith: nil)!,
+            UIControlStateWrapper(state: .highlighted): UIImage(named: "text-icon-selected", in: Bundle(for: TextChatInputItem.self), compatibleWith: nil)!
         ]
         return TabInputButtonAppearance(images: images, size: nil)
     }
 
-    lazy private var internalTabView: TabInputButton = {
+    lazy fileprivate var internalTabView: TabInputButton = {
         return TabInputButton.makeInputButton(withAppearance: self.buttonAppearance, accessibilityID: "text.chat.input.view")
     }()
 
-    public var selected = false {
+    open var selected = false {
         didSet {
-            self.internalTabView.selected = self.selected
+            self.internalTabView.isSelected = self.selected
         }
     }
 }
@@ -56,7 +56,7 @@ public class TextChatInputItem {
 // MARK: - ChatInputItemProtocol
 extension TextChatInputItem : ChatInputItemProtocol {
     public var presentationMode: ChatInputItemPresentationMode {
-        return .Keyboard
+        return .keyboard
     }
 
     public var showsSendButton: Bool {
@@ -71,7 +71,7 @@ extension TextChatInputItem : ChatInputItemProtocol {
         return self.internalTabView
     }
 
-    public func handleInput(input: AnyObject) {
+    public func handleInput(_ input: AnyObject) {
         if let text = input as? String {
             self.textInputHandler?(text)
         }

ChattoAdditions/Source/Observable.swift

@@ -36,12 +36,12 @@ public class Observable<T> {
         didSet {
             self.cleanDeadObservers()
             for observer in self.observers {
-                observer.closure(old: oldValue, new: self.value)
+                observer.closure(oldValue, self.value)
             }
         }
     }
 
-    public func observe(observer: AnyObject, closure: (old: T, new: T) -> ()) {
+    public func observe(_ observer: AnyObject, closure: @escaping (_ old: T, _ new: T) -> ()) {
         self.observers.append(Observer(owner: observer, closure: closure))
         self.cleanDeadObservers()
     }
@@ -55,8 +55,8 @@ public class Observable<T> {
 
 private struct Observer<T> {
     weak var owner: AnyObject?
-    let closure: (old: T, new: T) -> ()
-    init (owner: AnyObject, closure: (old: T, new: T) -> ()) {
+    let closure: (_ old: T, _ new: T) -> ()
+    init (owner: AnyObject, closure: @escaping (_ old: T, _ new: T) -> ()) {
         self.owner = owner
         self.closure = closure
     }

ChattoAdditions/Source/UI Components/CircleProgressIndicatorView/CircleProgressView.m

@@ -101,6 +101,7 @@
   rotationAnimation.duration = 1;
   rotationAnimation.cumulative = YES;
   rotationAnimation.repeatCount = HUGE_VALF;
+  rotationAnimation.removedOnCompletion = NO;
   [_bgLayer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
 }
 

ChattoAdditions/Source/Utils.swift

@@ -25,26 +25,26 @@
 import Foundation
 import CoreGraphics
 
-private let scale = UIScreen.mainScreen().scale
+private let scale = UIScreen.main.scale
 
 public enum HorizontalAlignment {
-    case Left
-    case Center
-    case Right
+    case left
+    case center
+    case right
 }
 
 public enum VerticalAlignment {
-    case Top
-    case Center
-    case Bottom
+    case top
+    case center
+    case bottom
 }
 
 public extension CGSize {
-    func bma_insetBy(dx dx: CGFloat, dy: CGFloat) -> CGSize {
+    func bma_insetBy(dx: CGFloat, dy: CGFloat) -> CGSize {
         return CGSize(width: self.width - dx, height: self.height - dy)
     }
 
-    func bma_outsetBy(dx dx: CGFloat, dy: CGFloat) -> CGSize {
+    func bma_outsetBy(dx: CGFloat, dy: CGFloat) -> CGSize {
         return self.bma_insetBy(dx: -dx, dy: -dy)
     }
 }
@@ -59,21 +59,21 @@ public extension CGSize {
 
         // Horizontal alignment
         switch xAlignament {
-        case .Left:
+        case .left:
             originX = 0
-        case .Center:
+        case .center:
             originX = containerRect.midX - self.width / 2.0
-        case .Right:
+        case .right:
             originX = containerRect.maxY - self.width
         }
 
         // Vertical alignment
         switch yAlignment {
-        case .Top:
+        case .top:
             originY = 0
-        case .Center:
+        case .center:
             originY = containerRect.midY - self.height / 2.0
-        case .Bottom:
+        case .bottom:
             originY = containerRect.maxY - self.height
         }
 
@@ -105,9 +105,8 @@ public extension CGRect {
     }
 }
 
-
 public extension CGPoint {
-    func bma_offsetBy(dx dx: CGFloat, dy: CGFloat) -> CGPoint {
+    func bma_offsetBy(dx: CGFloat, dy: CGFloat) -> CGPoint {
         return CGPoint(x: self.x + dx, y: self.y + dy)
     }
 }
@@ -147,39 +146,38 @@ public extension UIEdgeInsets {
 
 }
 
-
 public extension UIImage {
 
-    public func bma_tintWithColor(color: UIColor) -> UIImage {
+    public func bma_tintWithColor(_ color: UIColor) -> UIImage {
         let rect = CGRect(origin: CGPoint.zero, size: self.size)
         UIGraphicsBeginImageContextWithOptions(rect.size, false, self.scale)
         let context = UIGraphicsGetCurrentContext()!
         color.setFill()
-        CGContextFillRect(context, rect)
-        self.drawInRect(rect, blendMode: .DestinationIn, alpha: 1)
+        context.fill(rect)
+        self.draw(in: rect, blendMode: .destinationIn, alpha: 1)
         let image = UIGraphicsGetImageFromCurrentImageContext()!
         UIGraphicsEndImageContext()
-        return image.resizableImageWithCapInsets(self.capInsets)
+        return image.resizableImage(withCapInsets: self.capInsets)
     }
 
-    public func bma_blendWithColor(color: UIColor) -> UIImage {
+    public func bma_blendWithColor(_ color: UIColor) -> UIImage {
         let rect = CGRect(origin: CGPoint.zero, size: self.size)
-        UIGraphicsBeginImageContextWithOptions(rect.size, false, UIScreen.mainScreen().scale)
+        UIGraphicsBeginImageContextWithOptions(rect.size, false, UIScreen.main.scale)
         let context = UIGraphicsGetCurrentContext()!
-        CGContextTranslateCTM(context, 0, rect.height)
-        CGContextScaleCTM(context, 1.0, -1.0)
-        CGContextSetBlendMode(context, .Normal)
-        CGContextDrawImage(context, rect, self.CGImage!)
-        CGContextClipToMask(context, rect, self.CGImage!)
+        context.translateBy(x: 0, y: rect.height)
+        context.scaleBy(x: 1.0, y: -1.0)
+        context.setBlendMode(.normal)
+        context.draw(self.cgImage!, in: rect)
+        context.clip(to: rect, mask: self.cgImage!)
         color.setFill()
-        CGContextAddRect(context, rect)
-        CGContextDrawPath(context, .Fill)
+        context.addRect(rect)
+        context.drawPath(using: .fill)
         let image = UIGraphicsGetImageFromCurrentImageContext()!
         UIGraphicsEndImageContext()
-        return image.resizableImageWithCapInsets(self.capInsets)
+        return image.resizableImage(withCapInsets: self.capInsets)
     }
 
-    public static func bma_imageWithColor(color: UIColor, size: CGSize) -> UIImage {
+    public static func bma_imageWithColor(_ color: UIColor, size: CGSize) -> UIImage {
         let rect = CGRect(origin: CGPoint.zero, size: size)
         UIGraphicsBeginImageContextWithOptions(size, false, 0)
         color.setFill()
@@ -191,11 +189,11 @@ public extension UIImage {
 }
 
 public extension UIColor {
-    static func bma_color(rgb rgb: Int) -> UIColor {
+    static func bma_color(rgb: Int) -> UIColor {
         return UIColor(red: CGFloat((rgb & 0xFF0000) >> 16) / 255.0, green: CGFloat((rgb & 0xFF00) >> 8) / 255.0, blue: CGFloat((rgb & 0xFF)) / 255.0, alpha: 1.0)
     }
 
-    public func bma_blendWithColor(color: UIColor) -> UIColor {
+    public func bma_blendWithColor(_ color: UIColor) -> UIColor {
         var r1: CGFloat = 0, r2: CGFloat = 0
         var g1: CGFloat = 0, g2: CGFloat = 0
         var b1: CGFloat = 0, b2: CGFloat = 0

ChattoAdditions/Tests/Chat Items/BaseMessage/BaseMessagePresenterTests.swift

@@ -33,11 +33,12 @@ class BaseMessagePresenterTests: XCTestCase {
     let decorationAttributes = ChatItemDecorationAttributes(bottomMargin: 0, showsTail: false, canShowAvatar: false)
     var interactionHandler: PhotoMessageTestHandler!
     override func setUp() {
+        super.setUp()
         let viewModelBuilder = PhotoMessageViewModelDefaultBuilder<PhotoMessageModel<MessageModel>>()
         let sizingCell = PhotoMessageCollectionViewCell.sizingCell()
         let photoStyle = PhotoMessageCollectionViewCellDefaultStyle()
         let baseStyle = BaseMessageCollectionViewCellDefaultStyle()
-        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "photo-message", isIncoming: true, date: NSDate(), status: .Success)
+        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "photo-message", isIncoming: true, date: Date(), status: .success)
         let photoMessageModel = PhotoMessageModel(messageModel: messageModel, imageSize: CGSize(width: 30, height: 30), image: UIImage())
         self.interactionHandler = PhotoMessageTestHandler()
         self.presenter = PhotoMessagePresenter(messageModel: photoMessageModel, viewModelBuilder: viewModelBuilder, interactionHandler: self.interactionHandler, sizingCell: sizingCell, baseCellStyle: baseStyle, photoCellStyle: photoStyle)
@@ -60,14 +61,14 @@ class BaseMessagePresenterTests: XCTestCase {
     func testThat_WhenCellIsBeginLongPressOnBubble_ThenInteractionHandlerHandlesEvent() {
         let cell = PhotoMessageCollectionViewCell(frame: CGRect.zero)
         self.presenter.configureCell(cell, decorationAttributes: self.decorationAttributes)
-        cell.onBubbleLongPressBegan?(cell: cell)
+        cell.onBubbleLongPressBegan?(cell)
         XCTAssertTrue(self.interactionHandler.didHandleBeginLongPressOnBubble)
     }
 
     func testThat_WhenCellIsEndLongPressOnBubble_ThenInteractionHandlerHandlesEvent() {
         let cell = PhotoMessageCollectionViewCell(frame: CGRect.zero)
         self.presenter.configureCell(cell, decorationAttributes: self.decorationAttributes)
-        cell.onBubbleLongPressEnded?(cell: cell)
+        cell.onBubbleLongPressEnded?(cell)
         XCTAssertTrue(self.interactionHandler.didHandleEndLongPressOnBubble)
     }
 }

ChattoAdditions/Tests/Chat Items/PhotoMessages/PhotoMessagePresenterBuilderTests.swift

@@ -28,7 +28,7 @@ import XCTest
 class PhotoMessagePresenterBuilderTests: XCTestCase {
 
     func testThat_CreatesPresenter() {
-        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "photo-message", isIncoming: true, date: NSDate(), status: .Success)
+        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "photo-message", isIncoming: true, date: Date(), status: .success)
         let photoMessageModel = PhotoMessageModel(messageModel: messageModel, imageSize: CGSize(width: 30, height: 30), image: UIImage())
         let builder = PhotoMessagePresenterBuilder(viewModelBuilder: PhotoMessageViewModelDefaultBuilder<PhotoMessageModel<MessageModel>>(), interactionHandler: PhotoMessageTestHandler())
         XCTAssertNotNil(builder.createPresenterWithChatItem(photoMessageModel))

ChattoAdditions/Tests/Chat Items/PhotoMessages/PhotoMessagePresenterTests.swift

@@ -31,11 +31,12 @@ class PhotoMessagePresenterTests: XCTestCase, UICollectionViewDataSource {
     let decorationAttributes = ChatItemDecorationAttributes(bottomMargin: 0, showsTail: false, canShowAvatar: false)
     let testImage = UIImage()
     override func setUp() {
+        super.setUp()
         let viewModelBuilder = PhotoMessageViewModelDefaultBuilder<PhotoMessageModel<MessageModel>>()
         let sizingCell = PhotoMessageCollectionViewCell.sizingCell()
         let photoStyle = PhotoMessageCollectionViewCellDefaultStyle()
         let baseStyle = BaseMessageCollectionViewCellDefaultStyle()
-        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "photo-message", isIncoming: true, date: NSDate(), status: .Success)
+        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "photo-message", isIncoming: true, date: NSDate() as Date, status: .success)
         let photoMessageModel = PhotoMessageModel(messageModel: messageModel, imageSize: CGSize(width: 30, height: 30), image: self.testImage)
         self.presenter = PhotoMessagePresenter(messageModel: photoMessageModel, viewModelBuilder: viewModelBuilder, interactionHandler: PhotoMessageTestHandler(), sizingCell: sizingCell, baseCellStyle: baseStyle, photoCellStyle: photoStyle)
     }
@@ -60,18 +61,18 @@ class PhotoMessagePresenterTests: XCTestCase, UICollectionViewDataSource {
         PhotoMessagePresenter<PhotoMessageViewModelDefaultBuilder<PhotoMessageModel<MessageModel>>, PhotoMessageTestHandler>.registerCells(collectionView)
         collectionView.dataSource = self
         collectionView.reloadData()
-        XCTAssertNotNil(self.presenter.dequeueCell(collectionView: collectionView, indexPath: NSIndexPath(forItem: 0, inSection: 0)))
+        XCTAssertNotNil(self.presenter.dequeueCell(collectionView: collectionView, indexPath: IndexPath(item: 0, section: 0)))
         collectionView.dataSource = nil
     }
 
     // MARK: Helpers
 
-    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
         return 1
     }
 
-    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
-        return self.presenter.dequeueCell(collectionView: collectionView, indexPath: indexPath)
+    public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
+        return self.presenter.dequeueCell(collectionView: collectionView, indexPath: indexPath as IndexPath)
     }
 }
 
@@ -79,27 +80,27 @@ class PhotoMessageTestHandler: BaseMessageInteractionHandlerProtocol {
     typealias ViewModelT = PhotoMessageViewModel<PhotoMessageModel<MessageModel>>
 
     var didHandleTapOnFailIcon = false
-    func userDidTapOnFailIcon(viewModel viewModel: ViewModelT, failIconView: UIView) {
+    func userDidTapOnFailIcon(viewModel: ViewModelT, failIconView: UIView) {
         self.didHandleTapOnFailIcon = true
     }
 
     var didHandleTapOnAvatar = false
-    func userDidTapOnAvatar(viewModel viewModel: ViewModelT) {
+    func userDidTapOnAvatar(viewModel: ViewModelT) {
         self.didHandleTapOnAvatar = true
     }
 
     var didHandleTapOnBubble = false
-    func userDidTapOnBubble(viewModel viewModel: ViewModelT) {
+    func userDidTapOnBubble(viewModel: ViewModelT) {
         self.didHandleTapOnBubble = true
     }
 
     var didHandleBeginLongPressOnBubble = false
-    func userDidBeginLongPressOnBubble(viewModel viewModel: ViewModelT) {
+    func userDidBeginLongPressOnBubble(viewModel: ViewModelT) {
         self.didHandleBeginLongPressOnBubble = true
     }
 
     var didHandleEndLongPressOnBubble = false
-    func userDidEndLongPressOnBubble(viewModel viewModel: ViewModelT) {
+    func userDidEndLongPressOnBubble(viewModel: ViewModelT) {
         self.didHandleEndLongPressOnBubble = true
     }
 }

ChattoAdditions/Tests/Chat Items/TextMessages/TextMessagePresenterBuilderTests.swift

@@ -28,7 +28,7 @@ import XCTest
 class TextMessagePresenterBuilderTests: XCTestCase {
 
     func testThat_CreatesPresenter() {
-        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "text-message", isIncoming: true, date: NSDate(), status: .Success)
+        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "text-message", isIncoming: true, date: Date(), status: .success)
         let textMessageModel = TextMessageModel(messageModel: messageModel, text: "Some text")
         let builder = TextMessagePresenterBuilder(viewModelBuilder: TextMessageViewModelDefaultBuilder<TextMessageModel<MessageModel>>(), interactionHandler: TextMessageTestHandler())
         XCTAssertNotNil(builder.createPresenterWithChatItem(textMessageModel))

ChattoAdditions/Tests/Chat Items/TextMessages/TextMessagePresenterTests.swift

@@ -31,11 +31,12 @@ class TextMessagePresenterTests: XCTestCase, UICollectionViewDataSource {
     var presenter: TextMessagePresenter<TextMessageViewModelDefaultBuilder<TextMessageModel<MessageModel>>, TextMessageTestHandler>!
     let decorationAttributes = ChatItemDecorationAttributes(bottomMargin: 0, showsTail: false, canShowAvatar: false)
     override func setUp() {
+        super.setUp()
         let viewModelBuilder = TextMessageViewModelDefaultBuilder<TextMessageModel<MessageModel>>()
         let sizingCell = TextMessageCollectionViewCell.sizingCell()
         let textStyle = TextMessageCollectionViewCellDefaultStyle()
         let baseStyle = BaseMessageCollectionViewCellDefaultStyle()
-        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "text-message", isIncoming: true, date: NSDate(), status: .Success)
+        let messageModel = MessageModel(uid: "uid", senderId: "senderId", type: "text-message", isIncoming: true, date: NSDate() as Date, status: .success)
         let textMessageModel = TextMessageModel(messageModel: messageModel, text: "Some text")
         self.presenter = TextMessagePresenter(messageModel: textMessageModel, viewModelBuilder: viewModelBuilder, interactionHandler: TextMessageTestHandler(), sizingCell: sizingCell, baseCellStyle: baseStyle, textCellStyle: textStyle, layoutCache: NSCache())
     }
@@ -46,7 +47,7 @@ class TextMessagePresenterTests: XCTestCase, UICollectionViewDataSource {
         TextMessagePresenter<TextMessageViewModelDefaultBuilder<TextMessageModel<MessageModel>>, TextMessageTestHandler>.registerCells(collectionView)
         collectionView.dataSource = self
         collectionView.reloadData()
-        XCTAssertNotNil(self.presenter.dequeueCell(collectionView: collectionView, indexPath: NSIndexPath(forItem: 0, inSection: 0)))
+        XCTAssertNotNil(self.presenter.dequeueCell(collectionView: collectionView, indexPath: IndexPath(item: 0, section: 0)))
         collectionView.dataSource = nil
     }
 
@@ -81,35 +82,35 @@ class TextMessagePresenterTests: XCTestCase, UICollectionViewDataSource {
 
     // MARK: Helpers
 
-    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
         return 1
     }
 
-    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
-        return self.presenter.dequeueCell(collectionView: collectionView, indexPath: indexPath)
+    public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
+        return self.presenter.dequeueCell(collectionView: collectionView, indexPath: indexPath as IndexPath)
     }
 }
 
 class TextMessageTestHandler: BaseMessageInteractionHandlerProtocol {
     typealias ViewModelT = TextMessageViewModel<TextMessageModel<MessageModel>>
 
-    func userDidTapOnFailIcon(viewModel viewModel: ViewModelT, failIconView: UIView) {
+    func userDidTapOnFailIcon(viewModel: ViewModelT, failIconView: UIView) {
 
     }
 
-    func userDidTapOnAvatar(viewModel viewModel: ViewModelT) {
+    func userDidTapOnAvatar(viewModel: ViewModelT) {
 
     }
 
-    func userDidTapOnBubble(viewModel viewModel: ViewModelT) {
+    func userDidTapOnBubble(viewModel: ViewModelT) {
 
     }
 
-    func userDidBeginLongPressOnBubble(viewModel viewModel: ViewModelT) {
+    func userDidBeginLongPressOnBubble(viewModel: ViewModelT) {
 
     }
 
-    func userDidEndLongPressOnBubble(viewModel viewModel: ViewModelT) {
+    func userDidEndLongPressOnBubble(viewModel: ViewModelT) {
 
     }
 }

ChattoAdditions/Tests/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>BNDL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.1.0</string>
+	<string>3.0.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

ChattoAdditions/Tests/Input/ChatInputBarTests.swift

@@ -49,7 +49,7 @@ class ChatInputBarTests: XCTestCase {
         return itemView
     }
 
-    private func simulateTapOnTextViewForDelegate(textViewDelegate: UITextViewDelegate) {
+    private func simulateTapOnTextViewForDelegate(_ textViewDelegate: UITextViewDelegate) {
         let dummyTextView = UITextView()
         let shouldBeginEditing = textViewDelegate.textViewShouldBeginEditing?(dummyTextView) ?? true
         guard shouldBeginEditing else { return }
@@ -57,22 +57,22 @@ class ChatInputBarTests: XCTestCase {
     }
 
     func testThat_WhenInputTextChanged_BarEnablesSendButton() {
-        self.bar.sendButton.enabled = false
+        self.bar.sendButton.isEnabled = false
         self.bar.inputText = "!"
-        XCTAssertTrue(self.bar.sendButton.enabled)
+        XCTAssertTrue(self.bar.sendButton.isEnabled)
     }
 
     func testThat_WhenInputTextBecomesEmpty_BarDisablesSendButton() {
-        self.bar.sendButton.enabled = true
+        self.bar.sendButton.isEnabled = true
         self.bar.inputText = ""
-        XCTAssertFalse(self.bar.sendButton.enabled)
+        XCTAssertFalse(self.bar.sendButton.isEnabled)
     }
 
     // MARK: - Presenter tests
     func testThat_WhenItemViewTapped_ItNotifiesPresenterThatNewItemReceivedFocus() {
         self.setupPresenter()
         let item = MockInputItem()
-        self.bar.inputItemViewTapped(createItemView(item))
+        self.bar.inputItemViewTapped(createItemView(inputItem: item))
 
         XCTAssertTrue(self.presenter.onDidReceiveFocusOnItemCalled)
         XCTAssertTrue(self.presenter.itemThatReceivedFocus === item)
@@ -91,21 +91,21 @@ class ChatInputBarTests: XCTestCase {
     }
 
     func testThat_GivenTextViewHasNoText_WhenTextViewDidChange_ItDisablesSendButton() {
-        self.bar.sendButton.enabled = true
+        self.bar.sendButton.isEnabled = true
 
         self.bar.textView.text = ""
         self.bar.textViewDidChange(self.bar.textView)
 
-        XCTAssertFalse(self.bar.sendButton.enabled)
+        XCTAssertFalse(self.bar.sendButton.isEnabled)
     }
 
     func testThat_WhenTextViewDidChange_ItEnablesSendButton() {
-        self.bar.sendButton.enabled = false
+        self.bar.sendButton.isEnabled = false
 
         self.bar.textView.text = "!"
         self.bar.textViewDidChange(self.bar.textView)
 
-        XCTAssertTrue(self.bar.sendButton.enabled)
+        XCTAssertTrue(self.bar.sendButton.isEnabled)
     }
 
     func testThat_WhenSendButtonTapped_ItNotifiesPresenter() {
@@ -118,7 +118,7 @@ class ChatInputBarTests: XCTestCase {
     func testThat_WhenItemViewTapped_ItNotifiesDelegateThatNewItemReceivedFocus() {
         self.setupDelegate()
         let item = MockInputItem()
-        self.bar.inputItemViewTapped(createItemView(item))
+        self.bar.inputItemViewTapped(createItemView(inputItem: item))
 
         XCTAssertTrue(self.delegate.inputBarDidReceiveFocusOnItemCalled)
         XCTAssertTrue(self.delegate.focusedItem === item)
@@ -158,14 +158,14 @@ class ChatInputBarTests: XCTestCase {
         self.bar.inputText = "    "
         self.bar.textViewDidChange(self.bar.textView)
         XCTAssertTrue(closureCalled)
-        XCTAssertFalse(self.bar.sendButton.enabled)
+        XCTAssertFalse(self.bar.sendButton.isEnabled)
     }
 
     func testThat_WhenItemViewTapped_ItReceivesFocuesByDefault() {
         self.setupPresenter()
 
         let item = MockInputItem()
-        self.bar.inputItemViewTapped(createItemView(item))
+        self.bar.inputItemViewTapped(createItemView(inputItem: item))
 
         XCTAssertTrue(self.presenter.onDidReceiveFocusOnItemCalled)
         XCTAssertTrue(self.presenter.itemThatReceivedFocus === item)
@@ -176,7 +176,7 @@ class ChatInputBarTests: XCTestCase {
         self.delegate.inputBarShouldFocusOnItemResult = true
 
         let item = MockInputItem()
-        self.bar.inputItemViewTapped(createItemView(item))
+        self.bar.inputItemViewTapped(createItemView(inputItem: item))
 
         XCTAssertTrue(self.delegate.inputBarShouldFocusOnItemCalled)
         XCTAssertTrue(self.delegate.inputBarDidReceiveFocusOnItemCalled)
@@ -188,7 +188,7 @@ class ChatInputBarTests: XCTestCase {
         self.delegate.inputBarShouldFocusOnItemResult = false
 
         let item = MockInputItem()
-        self.bar.inputItemViewTapped(createItemView(item))
+        self.bar.inputItemViewTapped(createItemView(inputItem: item))
 
         XCTAssertTrue(self.delegate.inputBarShouldFocusOnItemCalled)
         XCTAssertFalse(self.delegate.inputBarDidReceiveFocusOnItemCalled)
@@ -241,7 +241,7 @@ class FakeChatInputBarPresenter: ChatInputBarPresenter {
 
     var onDidReceiveFocusOnItemCalled = false
     var itemThatReceivedFocus: ChatInputItemProtocol?
-    func onDidReceiveFocusOnItem(item: ChatInputItemProtocol) {
+    func onDidReceiveFocusOnItem(_ item: ChatInputItemProtocol) {
         self.onDidReceiveFocusOnItemCalled = true
         self.itemThatReceivedFocus = item
     }
@@ -250,41 +250,41 @@ class FakeChatInputBarPresenter: ChatInputBarPresenter {
 class FakeChatInputBarDelegate: ChatInputBarDelegate {
     var inputBarShouldBeginTextEditingCalled = false
     var inputBarShouldBeginTextEditingResult = true
-    func inputBarShouldBeginTextEditing(inputBar: ChatInputBar) -> Bool {
+    func inputBarShouldBeginTextEditing(_ inputBar: ChatInputBar) -> Bool {
         self.inputBarShouldBeginTextEditingCalled = true
         return self.inputBarShouldBeginTextEditingResult
     }
 
     var inputBarDidBeginEditingCalled = false
-    func inputBarDidBeginEditing(inputBar: ChatInputBar) {
+    func inputBarDidBeginEditing(_ inputBar: ChatInputBar) {
         self.inputBarDidBeginEditingCalled = true
     }
 
     var inputBarDidEndEditingCalled = false
-    func inputBarDidEndEditing(inputBar: ChatInputBar) {
+    func inputBarDidEndEditing(_ inputBar: ChatInputBar) {
         self.inputBarDidEndEditingCalled = true
     }
 
     var inputBarDidChangeTextCalled = false
-    func inputBarDidChangeText(inputBar: ChatInputBar) {
+    func inputBarDidChangeText(_ inputBar: ChatInputBar) {
         self.inputBarDidChangeTextCalled = true
     }
 
     var inputBarSendButtonPressedCalled = false
-    func inputBarSendButtonPressed(inputBar: ChatInputBar) {
+    func inputBarSendButtonPressed(_ inputBar: ChatInputBar) {
         self.inputBarSendButtonPressedCalled = true
     }
 
     var inputBarShouldFocusOnItemCalled = false
     var inputBarShouldFocusOnItemResult = true
-    func inputBar(inputBar: ChatInputBar, shouldFocusOnItem item: ChatInputItemProtocol) -> Bool {
+    func inputBar(_ inputBar: ChatInputBar, shouldFocusOnItem item: ChatInputItemProtocol) -> Bool {
         self.inputBarShouldFocusOnItemCalled = true
         return self.inputBarShouldFocusOnItemResult
     }
 
     var inputBarDidReceiveFocusOnItemCalled = false
     var focusedItem: ChatInputItemProtocol?
-    func inputBar(inputBar: ChatInputBar, didReceiveFocusOnItem item: ChatInputItemProtocol) {
+    func inputBar(_ inputBar: ChatInputBar, didReceiveFocusOnItem item: ChatInputItemProtocol) {
         self.inputBarDidReceiveFocusOnItemCalled = true
         self.focusedItem = item
     }

ChattoAdditions/Tests/Input/ChatInputItemTests.swift

@@ -31,13 +31,13 @@ class ChatInputItemTests: XCTestCase {
 @objc
 class MockInputItem: NSObject, ChatInputItemProtocol {
     var selected = false
-    var presentationMode: ChatInputItemPresentationMode = .Keyboard
+    var presentationMode: ChatInputItemPresentationMode = .keyboard
     var showsSendButton = false
     var inputView: UIView? = nil
     let tabView = UIView()
 
     private(set) var handledInput: AnyObject?
-    func handleInput(input: AnyObject) {
+    func handleInput(_ input: AnyObject) {
         self.handledInput = input
     }
 }

ChattoAdditions/Tests/Input/ChatInputItemViewTests.swift

@@ -45,7 +45,7 @@ class ChatInputItemViewTests: XCTestCase {
 
 class MockInputItemViewDelegate: ChatInputItemViewDelegate {
     var itemViewTapped = false
-    func inputItemViewTapped(view: ChatInputItemView) {
+    func inputItemViewTapped(_ view: ChatInputItemView) {
         self.itemViewTapped = true
     }
 }

ChattoAdditions/Tests/Input/ChatInputPresenterTests.swift

@@ -58,7 +58,7 @@ class ChatInputPresenterTests: XCTestCase {
 
     func testThat_GivenItemHasNonePresentationMode_WhenItemReceivesFocus_ItDoesntBecomeFocused() {
         let item = MockInputItem()
-        item.presentationMode = .None
+        item.presentationMode = .none
         self.presenter.onDidReceiveFocusOnItem(item)
         XCTAssertNil(self.presenter.focusedItem)
     }
@@ -95,7 +95,7 @@ class ChatInputPresenterTests: XCTestCase {
     func testThat_GivenItemHasKeyboardPresentationMode_WhenItemReceivesFocus_PresenterShowsTextView() {
         self.bar.showsTextView = false
         let item = MockInputItem()
-        item.presentationMode = .Keyboard
+        item.presentationMode = .keyboard
         self.presenter.onDidReceiveFocusOnItem(item)
         XCTAssertTrue(self.bar.showsTextView)
     }
@@ -103,7 +103,7 @@ class ChatInputPresenterTests: XCTestCase {
     func testThat_GivenItemHasCustomViewPresentationMode_WhenItemReceivesFocus_PresenterHidesTextView() {
         self.bar.showsTextView = true
         let item = MockInputItem()
-        item.presentationMode = .CustomView
+        item.presentationMode = .customView
         self.presenter.onDidReceiveFocusOnItem(item)
         XCTAssertFalse(self.bar.showsTextView)
     }
@@ -111,7 +111,7 @@ class ChatInputPresenterTests: XCTestCase {
     func testThat_GivenItemHasNonePresentationMode_WhenItemReceivesFocus_PresenterDoesntHideTextView() {
         self.bar.showsTextView = true
         let item = MockInputItem()
-        item.presentationMode = .None
+        item.presentationMode = .none
         self.presenter.onDidReceiveFocusOnItem(item)
         XCTAssertTrue(self.bar.showsTextView)
 

ChattoAdditions/Tests/Input/LiveCameraCellPresenterTests.swift

@@ -30,7 +30,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
 
     var presenter: LiveCameraCellPresenter!
     var cell: LiveCameraCell!
-    var cameraAuthorizationStatus: AVAuthorizationStatus = .NotDetermined
+    var cameraAuthorizationStatus: AVAuthorizationStatus = .notDetermined
     var cameraAuthorizationStatusProvider: LiveCameraCellPresenter.AVAuthorizationStatusProvider!
 
     override func setUp() {
@@ -38,7 +38,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
         self.cameraAuthorizationStatusProvider = { [unowned self] in
             return self.cameraAuthorizationStatus
         }
-        self.presenter = LiveCameraCellPresenter(cellAppearance: nil, authorizationStatusProvider: self.cameraAuthorizationStatusProvider)
+        self.presenter = LiveCameraCellPresenter(authorizationStatusProvider: self.cameraAuthorizationStatusProvider)
         self.cell = LiveCameraCell()
     }
 
@@ -53,7 +53,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenAuthorizationStatusIsNotDetermined_CaptureDoesntStart() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .NotDetermined
+        self.cameraAuthorizationStatus = .notDetermined
 
         self.presenter.cellWillBeShown(self.cell)
 
@@ -63,7 +63,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenAuthorizationStatusIsRestricted_CaptureDoesntStart() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Restricted
+        self.cameraAuthorizationStatus = .restricted
 
         self.presenter.cellWillBeShown(self.cell)
 
@@ -73,7 +73,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenAuthorizationStatusIsDenied_CaptureDoesntStart() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Denied
+        self.cameraAuthorizationStatus = .denied
 
         self.presenter.cellWillBeShown(self.cell)
 
@@ -83,7 +83,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenAuthorizationStatusIsAuthorized_CaptureStarts() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
 
         self.presenter.cellWillBeShown(self.cell)
 
@@ -94,7 +94,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         mockCaptureSession.isCapturing = true
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
 
         self.presenter.cellWillBeShown(self.cell)
         self.presenter.cellWasHidden(self.cell)
@@ -108,10 +108,10 @@ class LiveCameraCellPresenterTests: XCTestCase {
         mockCaptureSession.isCapturing = true
         self.presenter.captureSession = mockCaptureSession
 
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
         self.presenter.cellWillBeShown(self.cell)
 
-        self.presenter.notificationCenter.postNotificationName(UIApplicationWillResignActiveNotification, object: nil)
+        self.presenter.notificationCenter.post(name: NSNotification.Name.UIApplicationWillResignActive, object: nil)
 
         XCTAssertFalse(mockCaptureSession.isCapturing)
     }
@@ -121,11 +121,11 @@ class LiveCameraCellPresenterTests: XCTestCase {
         mockCaptureSession.isCapturing = true
         self.presenter.captureSession = mockCaptureSession
 
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
         self.presenter.cellWillBeShown(self.cell)
 
-        self.presenter.notificationCenter.postNotificationName(UIApplicationWillResignActiveNotification, object: nil)
-        self.presenter.notificationCenter.postNotificationName(UIApplicationDidBecomeActiveNotification, object: nil)
+        self.presenter.notificationCenter.post(name: NSNotification.Name.UIApplicationWillResignActive, object: nil)
+        self.presenter.notificationCenter.post(name: NSNotification.Name.UIApplicationDidBecomeActive, object: nil)
 
         XCTAssertTrue(mockCaptureSession.isCapturing)
     }
@@ -135,12 +135,12 @@ class LiveCameraCellPresenterTests: XCTestCase {
         mockCaptureSession.isCapturing = false
         self.presenter.captureSession = mockCaptureSession
 
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
         self.presenter.cellWillBeShown(self.cell)
         self.presenter.cellWasHidden(self.cell)
 
-        self.presenter.notificationCenter.postNotificationName(UIApplicationWillResignActiveNotification, object: nil)
-        self.presenter.notificationCenter.postNotificationName(UIApplicationDidBecomeActiveNotification, object: nil)
+        self.presenter.notificationCenter.post(name: NSNotification.Name.UIApplicationWillResignActive, object: nil)
+        self.presenter.notificationCenter.post(name: NSNotification.Name.UIApplicationDidBecomeActive, object: nil)
 
         XCTAssertFalse(mockCaptureSession.isCapturing)
     }
@@ -148,7 +148,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenCellIsRemovedFromWindow_ThenCaptureIsStopped() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
 
         self.presenter.cellWillBeShown(self.cell)
 
@@ -159,7 +159,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenReusedCellIsRemovedFromWindow_ThenCaptureIsNotStopped() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
 
         let firstCell = LiveCameraCell()
         self.presenter.cellWillBeShown(firstCell)
@@ -172,7 +172,7 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenCellIsReaddedToWindow_ThenCaputreIsRestarted() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
 
         self.presenter.cellWillBeShown(self.cell)
         self.cell.didMoveToWindow()
@@ -186,14 +186,14 @@ class LiveCameraCellPresenterTests: XCTestCase {
     func testThat_WhenReusedCellIsReaddedToWindow_ThenCaptureIsNotRestarted() {
         let mockCaptureSession = MockLiveCameraCaptureSession()
         self.presenter.captureSession = mockCaptureSession
-        self.cameraAuthorizationStatus = .Authorized
+        self.cameraAuthorizationStatus = .authorized
 
         let firstCell = LiveCameraCell()
         self.presenter.cellWillBeShown(firstCell)
         self.presenter.cellWillBeShown(self.cell)
         self.cell.didMoveToWindow()
 
-        firstCell.willMoveToWindow(UIWindow())
+        firstCell.willMove(toWindow: UIWindow())
         XCTAssertFalse(mockCaptureSession.isCapturing)
     }
 }
@@ -209,7 +209,7 @@ private class MockLiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
     var isInitialized: Bool = false
     var isCapturing: Bool = false
 
-    func startCapturing(completion: () -> Void) {
+    func startCapturing(_ completion: @escaping () -> Void) {
         guard !self.isCapturing else { return }
 
         self.isInitialized = true
@@ -217,7 +217,7 @@ private class MockLiveCameraCaptureSession: LiveCameraCaptureSessionProtocol {
         completion()
     }
 
-    func stopCapturing(completion: () -> Void) {
+    func stopCapturing(_ completion: @escaping () -> Void) {
         guard self.isCapturing else { return }
 
         self.isInitialized = true

ChattoAdditions/Tests/Input/PhotosChatInputItemTests.swift

@@ -33,7 +33,7 @@ class PhotosChatInputItemTests: XCTestCase {
     }
 
     func testThat_PresentationModeIsCustomView() {
-        XCTAssertEqual(self.inputItem.presentationMode, ChatInputItemPresentationMode.CustomView)
+        XCTAssertEqual(self.inputItem.presentationMode, ChatInputItemPresentationMode.customView)
     }
 
     func testThat_SendButtonDisabledForPhotosInputItem() {
@@ -54,7 +54,7 @@ class PhotosChatInputItemTests: XCTestCase {
         self.inputItem.photoInputHandler = { image in
             handled = true
         }
-        self.inputItem.handleInput(5)
+        self.inputItem.handleInput(5 as AnyObject)
         XCTAssertFalse(handled)
     }
 

ChattoAdditions/Tests/Input/TextChatInputItemTests.swift

@@ -45,7 +45,7 @@ class TextChatInputItemTests: XCTestCase {
         self.inputItem.textInputHandler = { text in
             handled = true
         }
-        self.inputItem.handleInput("text")
+        self.inputItem.handleInput("text" as AnyObject)
         XCTAssertTrue(handled)
     }
 
@@ -54,7 +54,7 @@ class TextChatInputItemTests: XCTestCase {
         self.inputItem.textInputHandler = { text in
             handled = true
         }
-        self.inputItem.handleInput(5)
+        self.inputItem.handleInput(5 as AnyObject)
         XCTAssertFalse(handled)
     }
 }

ChattoApp/ChattoApp.xcodeproj/project.pbxproj

@@ -10,7 +10,6 @@
 		C33FBFAE1BDE441C008E3545 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = C33FBFAC1BDE441C008E3545 /* Main.storyboard */; };
 		C33FBFB01BDE441C008E3545 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = C33FBFAF1BDE441C008E3545 /* Assets.xcassets */; };
 		C33FBFB31BDE441C008E3545 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = C33FBFB11BDE441C008E3545 /* LaunchScreen.storyboard */; };
-		C33FBFC91BDE441C008E3545 /* ChattoAppUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = C33FBFC81BDE441C008E3545 /* ChattoAppUITests.swift */; };
 		C341D42E1C9635DF00FD3463 /* TimeSeparatorModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = C341D42B1C9635DF00FD3463 /* TimeSeparatorModel.swift */; };
 		C341D42F1C9635DF00FD3463 /* TimeSeparatorPresenter.swift in Sources */ = {isa = PBXBuildFile; fileRef = C341D42C1C9635DF00FD3463 /* TimeSeparatorPresenter.swift */; };
 		C341D4301C9635DF00FD3463 /* TimeSeparatorCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = C341D42D1C9635DF00FD3463 /* TimeSeparatorCollectionViewCell.swift */; };
@@ -45,13 +44,6 @@
 			remoteGlobalIDString = C33FBFA41BDE441C008E3545;
 			remoteInfo = ChattoApp;
 		};
-		C33FBFC51BDE441C008E3545 /* PBXContainerItemProxy */ = {
-			isa = PBXContainerItemProxy;
-			containerPortal = C33FBF9D1BDE441C008E3545 /* Project object */;
-			proxyType = 1;
-			remoteGlobalIDString = C33FBFA41BDE441C008E3545;
-			remoteInfo = ChattoApp;
-		};
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -79,9 +71,6 @@
 		C33FBFB41BDE441C008E3545 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		C33FBFB91BDE441C008E3545 /* ChattoAppTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = ChattoAppTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		C33FBFBF1BDE441C008E3545 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
-		C33FBFC41BDE441C008E3545 /* ChattoAppUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = ChattoAppUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		C33FBFC81BDE441C008E3545 /* ChattoAppUITests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChattoAppUITests.swift; sourceTree = "<group>"; };
-		C33FBFCA1BDE441C008E3545 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		C341D42B1C9635DF00FD3463 /* TimeSeparatorModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = TimeSeparatorModel.swift; path = "Time Separator/TimeSeparatorModel.swift"; sourceTree = "<group>"; };
 		C341D42C1C9635DF00FD3463 /* TimeSeparatorPresenter.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = TimeSeparatorPresenter.swift; path = "Time Separator/TimeSeparatorPresenter.swift"; sourceTree = "<group>"; };
 		C341D42D1C9635DF00FD3463 /* TimeSeparatorCollectionViewCell.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = TimeSeparatorCollectionViewCell.swift; path = "Time Separator/TimeSeparatorCollectionViewCell.swift"; sourceTree = "<group>"; };
@@ -123,13 +112,6 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		C33FBFC11BDE441C008E3545 /* Frameworks */ = {
-			isa = PBXFrameworksBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
@@ -156,7 +138,6 @@
 			children = (
 				C33FBFA71BDE441C008E3545 /* ChattoApp */,
 				C33FBFBC1BDE441C008E3545 /* ChattoAppTests */,
-				C33FBFC71BDE441C008E3545 /* ChattoAppUITests */,
 				C33FBFA61BDE441C008E3545 /* Products */,
 				0852C8B139C7CFA0A1C22090 /* Frameworks */,
 				B616EDF620454A787C7E7D84 /* Pods */,
@@ -168,7 +149,6 @@
 			children = (
 				C33FBFA51BDE441C008E3545 /* ChattoApp.app */,
 				C33FBFB91BDE441C008E3545 /* ChattoAppTests.xctest */,
-				C33FBFC41BDE441C008E3545 /* ChattoAppUITests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -194,15 +174,6 @@
 			path = ChattoAppTests;
 			sourceTree = "<group>";
 		};
-		C33FBFC71BDE441C008E3545 /* ChattoAppUITests */ = {
-			isa = PBXGroup;
-			children = (
-				C33FBFC81BDE441C008E3545 /* ChattoAppUITests.swift */,
-				C33FBFCA1BDE441C008E3545 /* Info.plist */,
-			);
-			path = ChattoAppUITests;
-			sourceTree = "<group>";
-		};
 		C341D42A1C96359000FD3463 /* Time Separator */ = {
 			isa = PBXGroup;
 			children = (
@@ -307,24 +278,6 @@
 			productReference = C33FBFB91BDE441C008E3545 /* ChattoAppTests.xctest */;
 			productType = "com.apple.product-type.bundle.unit-test";
 		};
-		C33FBFC31BDE441C008E3545 /* ChattoAppUITests */ = {
-			isa = PBXNativeTarget;
-			buildConfigurationList = C33FBFD31BDE441C008E3545 /* Build configuration list for PBXNativeTarget "ChattoAppUITests" */;
-			buildPhases = (
-				C33FBFC01BDE441C008E3545 /* Sources */,
-				C33FBFC11BDE441C008E3545 /* Frameworks */,
-				C33FBFC21BDE441C008E3545 /* Resources */,
-			);
-			buildRules = (
-			);
-			dependencies = (
-				C33FBFC61BDE441C008E3545 /* PBXTargetDependency */,
-			);
-			name = ChattoAppUITests;
-			productName = ChattoAppUITests;
-			productReference = C33FBFC41BDE441C008E3545 /* ChattoAppUITests.xctest */;
-			productType = "com.apple.product-type.bundle.ui-testing";
-		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -337,13 +290,11 @@
 				TargetAttributes = {
 					C33FBFA41BDE441C008E3545 = {
 						CreatedOnToolsVersion = 7.1;
+						LastSwiftMigration = 0800;
 					};
 					C33FBFB81BDE441C008E3545 = {
 						CreatedOnToolsVersion = 7.1;
-						TestTargetID = C33FBFA41BDE441C008E3545;
-					};
-					C33FBFC31BDE441C008E3545 = {
-						CreatedOnToolsVersion = 7.1;
+						LastSwiftMigration = 0800;
 						TestTargetID = C33FBFA41BDE441C008E3545;
 					};
 				};
@@ -363,7 +314,6 @@
 			targets = (
 				C33FBFA41BDE441C008E3545 /* ChattoApp */,
 				C33FBFB81BDE441C008E3545 /* ChattoAppTests */,
-				C33FBFC31BDE441C008E3545 /* ChattoAppUITests */,
 			);
 		};
 /* End PBXProject section */
@@ -387,13 +337,6 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		C33FBFC21BDE441C008E3545 /* Resources */ = {
-			isa = PBXResourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
@@ -437,7 +380,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
+			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F8D7533B1E7B2E137B143EBD /* [CP] Copy Pods Resources */ = {
@@ -494,14 +437,6 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		C33FBFC01BDE441C008E3545 /* Sources */ = {
-			isa = PBXSourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-				C33FBFC91BDE441C008E3545 /* ChattoAppUITests.swift in Sources */,
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
@@ -510,11 +445,6 @@
 			target = C33FBFA41BDE441C008E3545 /* ChattoApp */;
 			targetProxy = C33FBFBA1BDE441C008E3545 /* PBXContainerItemProxy */;
 		};
-		C33FBFC61BDE441C008E3545 /* PBXTargetDependency */ = {
-			isa = PBXTargetDependency;
-			target = C33FBFA41BDE441C008E3545 /* ChattoApp */;
-			targetProxy = C33FBFC51BDE441C008E3545 /* PBXContainerItemProxy */;
-		};
 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */
@@ -540,6 +470,7 @@
 		C33FBFCB1BDE441C008E3545 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -580,7 +511,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -588,6 +519,7 @@
 		C33FBFCC1BDE441C008E3545 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -621,7 +553,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 			};
@@ -631,7 +563,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 2CCB5DAFC70B636492325895 /* Pods-ChattoApp.debug.xcconfig */;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				FRAMEWORK_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = ChattoApp/Info.plist;
@@ -645,7 +576,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 6DABD92E2BA40464C1727DA2 /* Pods-ChattoApp.release.xcconfig */;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				FRAMEWORK_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = ChattoApp/Info.plist;
@@ -679,30 +609,6 @@
 			};
 			name = Release;
 		};
-		C33FBFD41BDE441C008E3545 /* Debug */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				INFOPLIST_FILE = ChattoAppUITests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				PRODUCT_BUNDLE_IDENTIFIER = com.badoo.ChattoAppUITests;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				TEST_TARGET_NAME = ChattoApp;
-				USES_XCTRUNNER = YES;
-			};
-			name = Debug;
-		};
-		C33FBFD51BDE441C008E3545 /* Release */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				INFOPLIST_FILE = ChattoAppUITests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				PRODUCT_BUNDLE_IDENTIFIER = com.badoo.ChattoAppUITests;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				TEST_TARGET_NAME = ChattoApp;
-				USES_XCTRUNNER = YES;
-			};
-			name = Release;
-		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
@@ -733,15 +639,6 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		C33FBFD31BDE441C008E3545 /* Build configuration list for PBXNativeTarget "ChattoAppUITests" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				C33FBFD41BDE441C008E3545 /* Debug */,
-				C33FBFD51BDE441C008E3545 /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
 /* End XCConfigurationList section */
 	};
 	rootObject = C33FBF9D1BDE441C008E3545 /* Project object */;

ChattoApp/ChattoApp.xcodeproj/xcshareddata/xcschemes/ChattoApp.xcscheme

@@ -39,16 +39,6 @@
                ReferencedContainer = "container:ChattoApp.xcodeproj">
             </BuildableReference>
          </TestableReference>
-         <TestableReference
-            skipped = "NO">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "C33FBFC31BDE441C008E3545"
-               BuildableName = "ChattoAppUITests.xctest"
-               BlueprintName = "ChattoAppUITests"
-               ReferencedContainer = "container:ChattoApp.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
       </Testables>
       <MacroExpansion>
          <BuildableReference

ChattoApp/ChattoApp/Source/AppDelegate.swift

@@ -29,33 +29,31 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
 
-
-    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
         // Override point for customization after application launch.
         return true
     }
 
-    func applicationWillResignActive(application: UIApplication) {
+    func applicationWillResignActive(_ application: UIApplication) {
         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
         // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
     }
 
-    func applicationDidEnterBackground(application: UIApplication) {
+    func applicationDidEnterBackground(_ application: UIApplication) {
         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
     }
 
-    func applicationWillEnterForeground(application: UIApplication) {
+    func applicationWillEnterForeground(_ application: UIApplication) {
         // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
     }
 
-    func applicationDidBecomeActive(application: UIApplication) {
+    func applicationDidBecomeActive(_ application: UIApplication) {
         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
     }
 
-    func applicationWillTerminate(application: UIApplication) {
+    func applicationWillTerminate(_ application: UIApplication) {
         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
     }
 
-
 }

ChattoApp/ChattoApp/Source/BaseMessageCollectionViewCellAvatarStyle.swift

@@ -26,7 +26,7 @@ import Foundation
 import ChattoAdditions
 
 class BaseMessageCollectionViewCellAvatarStyle: BaseMessageCollectionViewCellDefaultStyle {
-    override func avatarSize(viewModel viewModel: MessageViewModelProtocol) -> CGSize {
+    override func avatarSize(viewModel: MessageViewModelProtocol) -> CGSize {
         // Display avatar for both incoming and outgoing messages for demo purpose
         return CGSize(width: 35, height: 35)
     }

ChattoApp/ChattoApp/Source/BaseMessageHandler.swift

@@ -36,24 +36,24 @@ class BaseMessageHandler {
     init (messageSender: FakeMessageSender) {
         self.messageSender = messageSender
     }
-    func userDidTapOnFailIcon(viewModel viewModel: DemoMessageViewModelProtocol) {
+    func userDidTapOnFailIcon(viewModel: DemoMessageViewModelProtocol) {
         print("userDidTapOnFailIcon")
         self.messageSender.sendMessage(viewModel.messageModel)
     }
 
-    func userDidTapOnAvatar(viewModel viewModel: MessageViewModelProtocol) {
+    func userDidTapOnAvatar(viewModel: MessageViewModelProtocol) {
         print("userDidTapOnAvatar")
     }
 
-    func userDidTapOnBubble(viewModel viewModel: DemoMessageViewModelProtocol) {
+    func userDidTapOnBubble(viewModel: DemoMessageViewModelProtocol) {
         print("userDidTapOnBubble")
     }
 
-    func userDidBeginLongPressOnBubble(viewModel viewModel: DemoMessageViewModelProtocol) {
+    func userDidBeginLongPressOnBubble(viewModel: DemoMessageViewModelProtocol) {
         print("userDidBeginLongPressOnBubble")
     }
 
-    func userDidEndLongPressOnBubble(viewModel viewModel: DemoMessageViewModelProtocol) {
+    func userDidEndLongPressOnBubble(viewModel: DemoMessageViewModelProtocol) {
         print("userDidEndLongPressOnBubble")
     }
 }

ChattoApp/ChattoApp/Source/ChatItemsDemoDecorator.swift

@@ -30,14 +30,14 @@ final class ChatItemsDemoDecorator: ChatItemsDecoratorProtocol {
     struct Constants {
         static let shortSeparation: CGFloat = 3
         static let normalSeparation: CGFloat = 10
-        static let timeIntervalThresholdToIncreaseSeparation: NSTimeInterval = 120
+        static let timeIntervalThresholdToIncreaseSeparation: TimeInterval = 120
     }
 
-    func decorateItems(chatItems: [ChatItemProtocol]) -> [DecoratedChatItem] {
+    func decorateItems(_ chatItems: [ChatItemProtocol]) -> [DecoratedChatItem] {
         var decoratedChatItems = [DecoratedChatItem]()
-        let calendar = NSCalendar.currentCalendar()
+        let calendar = Calendar.current
 
-        for (index, chatItem) in chatItems.enumerate() {
+        for (index, chatItem) in chatItems.enumerated() {
             let next: ChatItemProtocol? = (index + 1 < chatItems.count) ? chatItems[index + 1] : nil
             let prev: ChatItemProtocol? = (index > 0) ? chatItems[index - 1] : nil
 
@@ -54,7 +54,7 @@ final class ChatItemsDemoDecorator: ChatItemsDecoratorProtocol {
                 }
 
                 if let previousMessage = prev as? MessageModelProtocol {
-                    addTimeSeparator = calendar.compareDate(currentMessage.date, toDate: previousMessage.date, toUnitGranularity: NSCalendarUnit.Day) != NSComparisonResult.OrderedSame
+                    addTimeSeparator = !calendar.isDate(currentMessage.date, inSameDayAs: previousMessage.date)
                 } else {
                     addTimeSeparator = true
                 }
@@ -77,13 +77,13 @@ final class ChatItemsDemoDecorator: ChatItemsDecoratorProtocol {
                 chatItem: chatItem,
                 decorationAttributes: ChatItemDecorationAttributes(bottomMargin: bottomMargin, showsTail: showsTail, canShowAvatar: showsTail))
             )
-            decoratedChatItems.appendContentsOf(additionalItems)
+            decoratedChatItems.append(contentsOf: additionalItems)
         }
 
         return decoratedChatItems
     }
 
-    func separationAfterItem(current: ChatItemProtocol?, next: ChatItemProtocol?) -> CGFloat {
+    func separationAfterItem(_ current: ChatItemProtocol?, next: ChatItemProtocol?) -> CGFloat {
         guard let nexItem = next else { return 0 }
         guard let currentMessage = current as? MessageModelProtocol else { return Constants.normalSeparation }
         guard let nextMessage = nexItem as? MessageModelProtocol else { return Constants.normalSeparation }
@@ -92,14 +92,14 @@ final class ChatItemsDemoDecorator: ChatItemsDecoratorProtocol {
             return 0
         } else if currentMessage.senderId != nextMessage.senderId {
             return Constants.normalSeparation
-        } else if nextMessage.date.timeIntervalSinceDate(currentMessage.date) > Constants.timeIntervalThresholdToIncreaseSeparation {
+        } else if nextMessage.date.timeIntervalSince(currentMessage.date) > Constants.timeIntervalThresholdToIncreaseSeparation {
             return Constants.normalSeparation
         } else {
             return Constants.shortSeparation
         }
     }
 
-    func showsStatusForMessage(message: MessageModelProtocol) -> Bool {
-        return message.status == .Failed || message.status == .Sending
+    func showsStatusForMessage(_ message: MessageModelProtocol) -> Bool {
+        return message.status == .failed || message.status == .sending
     }
 }

ChattoApp/ChattoApp/Source/ConversationsViewController.swift

@@ -26,7 +26,7 @@ import UIKit
 
 class ConversationsViewController: UITableViewController {
 
-    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 
         var initialCount = 0
         let pageSize = 50
@@ -39,18 +39,17 @@ class ConversationsViewController: UITableViewController {
         } else if segue.identifier == "10000 messages" {
             initialCount = 10000
         } else if segue.identifier == "overview" {
-            dataSource = FakeDataSource(messages: TutorialMessageFactory.createMessages().map { $0 }, pageSize: pageSize)
+            dataSource = FakeDataSource(messages: TutorialMessageFactory.createMessages(), pageSize: pageSize)
         } else {
             assert(false, "segue not handled!")
         }
 
-
         let chatController = { () -> DemoChatViewController? in
-            if let controller = segue.destinationViewController as? DemoChatViewController {
+            if let controller = segue.destination as? DemoChatViewController {
                 return controller
             }
-            if let tabController = segue.destinationViewController as? UITabBarController,
-                controller = tabController.viewControllers?.first as? DemoChatViewController {
+            if let tabController = segue.destination as? UITabBarController,
+                let controller = tabController.viewControllers?.first as? DemoChatViewController {
                 return controller
             }
             return nil

ChattoApp/ChattoApp/Source/DemoChatViewController.swift

@@ -42,9 +42,9 @@ class DemoChatViewController: BaseChatViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        let image = UIImage(named: "bubble-incoming-tail-border", inBundle: NSBundle(forClass: DemoChatViewController.self), compatibleWithTraitCollection: nil)?.bma_tintWithColor(UIColor.blueColor())
+        let image = UIImage(named: "bubble-incoming-tail-border", in: Bundle(for: DemoChatViewController.self), compatibleWith: nil)?.bma_tintWithColor(.blue)
         super.chatItemsDecorator = ChatItemsDemoDecorator()
-        let addIncomingMessageButton = UIBarButtonItem(image: image, style: .Plain, target: self, action: #selector(DemoChatViewController.addRandomIncomingMessage))
+        let addIncomingMessageButton = UIBarButtonItem(image: image, style: .plain, target: self, action: #selector(DemoChatViewController.addRandomIncomingMessage))
         self.navigationItem.rightBarButtonItem = addIncomingMessageButton
     }