diff --git a/RxCocoa/Common/_RXDelegateProxy.h b/RxCocoa/Common/_RXDelegateProxy.h
index 03b93bd8..22a5a402 100644
--- a/RxCocoa/Common/_RXDelegateProxy.h
+++ b/RxCocoa/Common/_RXDelegateProxy.h
@@ -14,7 +14,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @property (nonatomic, weak, readonly) id _forwardToDelegate;
 
--(void)_setForwardToDelegate:(id)forwardToDelegate retainDelegate:(BOOL)retainDelegate;
+-(void)_setForwardToDelegate:(id __nullable)forwardToDelegate retainDelegate:(BOOL)retainDelegate;
 
 -(BOOL)hasWiredImplementationForSelector:(SEL)selector;
 
diff --git a/RxCocoa/Common/_RXDelegateProxy.m b/RxCocoa/Common/_RXDelegateProxy.m
index e5fe3335..2cbffa5a 100644
--- a/RxCocoa/Common/_RXDelegateProxy.m
+++ b/RxCocoa/Common/_RXDelegateProxy.m
@@ -96,7 +96,7 @@ static NSMutableDictionary *forwardableSelectorsPerClass = nil;
     return __forwardToDelegate;
 }
 
--(void)_setForwardToDelegate:(id)forwardToDelegate retainDelegate:(BOOL)retainDelegate {
+-(void)_setForwardToDelegate:(id __nullable)forwardToDelegate retainDelegate:(BOOL)retainDelegate {
     __forwardToDelegate = forwardToDelegate;
     if (retainDelegate) {
         self.strongForwardDelegate = forwardToDelegate;
diff --git a/RxExample/RxDataSources/DataSources+Rx/UISectionedViewType+RxAnimatedDataSource.swift b/RxExample/RxDataSources/DataSources+Rx/UISectionedViewType+RxAnimatedDataSource.swift
index 08689914..27e932c2 100644
--- a/RxExample/RxDataSources/DataSources+Rx/UISectionedViewType+RxAnimatedDataSource.swift
+++ b/RxExample/RxDataSources/DataSources+Rx/UISectionedViewType+RxAnimatedDataSource.swift
@@ -18,17 +18,17 @@ extension UITableView {
     public func rx_itemsAnimatedWithDataSource<
             DataSource: RxTableViewDataSourceType & UITableViewDataSource,
             S: Sequence,
-            O: ObservableType
-        where
-            DataSource.Element == S,
-            O.E == S,
-            S.Iterator.Element: AnimatableSectionModelType
-        >
+            O: ObservableType>
         (_ dataSource: DataSource)
-        -> (source: O)
-        -> Disposable  {
+        -> (_ source: O)
+        -> Disposable
+        where
+        DataSource.Element == S,
+        O.E == S,
+        S.Iterator.Element: AnimatableSectionModelType
+    {
         return  { source in
-            return self.rx_itemsWithDataSource(dataSource)(source: source)
+            return self.rx_itemsWithDataSource(dataSource)(source)
         }
     }
 }
@@ -38,17 +38,17 @@ extension UICollectionView {
     public func rx_itemsAnimatedWithDataSource<
             DataSource: RxCollectionViewDataSourceType & UICollectionViewDataSource,
             S: Sequence,
-            O: ObservableType
-        where
-            DataSource.Element == S,
-            O.E == S,
-            S.Iterator.Element: AnimatableSectionModelType
-        >
+            O: ObservableType>
         (_ dataSource: DataSource)
-        -> (source: O)
-        -> Disposable  {
+        -> (_ source: O)
+        -> Disposable
+        where
+        DataSource.Element == S,
+        O.E == S,
+        S.Iterator.Element: AnimatableSectionModelType
+    {
         return { source in
-            return self.rx_itemsWithDataSource(dataSource)(source: source)
+            return self.rx_itemsWithDataSource(dataSource)(source)
         }
     }
 }
diff --git a/RxExample/RxDataSources/DataSources/CollectionViewSectionedDataSource.swift b/RxExample/RxDataSources/DataSources/CollectionViewSectionedDataSource.swift
index 24802b55..ba984961 100644
--- a/RxExample/RxDataSources/DataSources/CollectionViewSectionedDataSource.swift
+++ b/RxExample/RxDataSources/DataSources/CollectionViewSectionedDataSource.swift
@@ -142,14 +142,14 @@ public class CollectionViewSectionedDataSource<S: SectionModelType>
         }
     }
     
-    public var moveItem: ((CollectionViewSectionedDataSource<S>, sourceIndexPath:IndexPath, destinationIndexPath:IndexPath) -> Void)? {
+    public var moveItem: ((CollectionViewSectionedDataSource<S>, _ sourceIndexPath:IndexPath, _ destinationIndexPath:IndexPath) -> Void)? {
         didSet {
             #if DEBUG
                 ensureNotMutatedAfterBinding()
             #endif
         }
     }
-    public var canMoveItemAtIndexPath: ((CollectionViewSectionedDataSource<S>, indexPath:IndexPath) -> Bool)? {
+    public var canMoveItemAtIndexPath: ((CollectionViewSectionedDataSource<S>, IndexPath) -> Bool)? {
         didSet {
             #if DEBUG
             ensureNotMutatedAfterBinding()
@@ -196,7 +196,7 @@ public class CollectionViewSectionedDataSource<S: SectionModelType>
     }
     
     override func _rx_collectionView(_ collectionView: UICollectionView, canMoveItemAtIndexPath indexPath: IndexPath) -> Bool {
-        guard let canMoveItem = canMoveItemAtIndexPath?(self, indexPath: indexPath) else {
+        guard let canMoveItem = canMoveItemAtIndexPath?(self, indexPath) else {
             return super._rx_collectionView(collectionView, canMoveItemAtIndexPath: indexPath)
         }
         
diff --git a/RxExample/RxDataSources/DataSources/TableViewSectionedDataSource.swift b/RxExample/RxDataSources/DataSources/TableViewSectionedDataSource.swift
index 856dfd2b..c454b584 100644
--- a/RxExample/RxDataSources/DataSources/TableViewSectionedDataSource.swift
+++ b/RxExample/RxDataSources/DataSources/TableViewSectionedDataSource.swift
@@ -165,14 +165,14 @@ public class RxTableViewSectionedDataSource<S: SectionModelType>
         }
     }
     
-    public var titleForHeaderInSection: ((RxTableViewSectionedDataSource<S>, section: Int) -> String?)? {
+    public var titleForHeaderInSection: ((RxTableViewSectionedDataSource<S>, Int) -> String?)? {
         didSet {
             #if DEBUG
                 ensureNotMutatedAfterBinding()
             #endif
         }
     }
-    public var titleForFooterInSection: ((RxTableViewSectionedDataSource<S>, section: Int) -> String?)? {
+    public var titleForFooterInSection: ((RxTableViewSectionedDataSource<S>, Int) -> String?)? {
         didSet {
             #if DEBUG
                 ensureNotMutatedAfterBinding()
@@ -180,14 +180,14 @@ public class RxTableViewSectionedDataSource<S: SectionModelType>
         }
     }
     
-    public var canEditRowAtIndexPath: ((RxTableViewSectionedDataSource<S>, indexPath: IndexPath) -> Bool)? {
+    public var canEditRowAtIndexPath: ((RxTableViewSectionedDataSource<S>, IndexPath) -> Bool)? {
         didSet {
             #if DEBUG
                 ensureNotMutatedAfterBinding()
             #endif
         }
     }
-    public var canMoveRowAtIndexPath: ((RxTableViewSectionedDataSource<S>, indexPath: IndexPath) -> Bool)? {
+    public var canMoveRowAtIndexPath: ((RxTableViewSectionedDataSource<S>, IndexPath) -> Bool)? {
         didSet {
             #if DEBUG
                 ensureNotMutatedAfterBinding()
@@ -205,7 +205,7 @@ public class RxTableViewSectionedDataSource<S: SectionModelType>
             #endif
         }
     }
-    public var sectionForSectionIndexTitle:((RxTableViewSectionedDataSource<S>, title: String, index: Int) -> Int)? {
+    public var sectionForSectionIndexTitle:((RxTableViewSectionedDataSource<S>, _ title: String, _ index: Int) -> Int)? {
         didSet {
             #if DEBUG
             ensureNotMutatedAfterBinding()
@@ -242,15 +242,15 @@ public class RxTableViewSectionedDataSource<S: SectionModelType>
     }
     
     override func _rx_tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
-        return titleForHeaderInSection?(self, section: section)
+        return titleForHeaderInSection?(self, section)
     }
     
     override func _rx_tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
-        return titleForFooterInSection?(self, section: section)
+        return titleForFooterInSection?(self, section)
     }
     
     override func _rx_tableView(_ tableView: UITableView, canEditRowAtIndexPath indexPath: IndexPath) -> Bool {
-        guard let canEditRow = canEditRowAtIndexPath?(self, indexPath: indexPath) else {
+        guard let canEditRow = canEditRowAtIndexPath?(self, indexPath) else {
             return super._rx_tableView(tableView, canEditRowAtIndexPath: indexPath)
         }
         
@@ -258,7 +258,7 @@ public class RxTableViewSectionedDataSource<S: SectionModelType>
     }
    
     override func _rx_tableView(_ tableView: UITableView, canMoveRowAtIndexPath indexPath: IndexPath) -> Bool {
-        guard let canMoveRow = canMoveRowAtIndexPath?(self, indexPath: indexPath) else {
+        guard let canMoveRow = canMoveRowAtIndexPath?(self, indexPath) else {
             return super._rx_tableView(tableView, canMoveRowAtIndexPath: indexPath)
         }
         
@@ -279,7 +279,7 @@ public class RxTableViewSectionedDataSource<S: SectionModelType>
     }
     
     override func _rx_tableView(_ tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
-        guard let section = sectionForSectionIndexTitle?(self, title: title, index: index) else {
+        guard let section = sectionForSectionIndexTitle?(self, title, index) else {
             return super._rx_tableView(tableView, sectionForSectionIndexTitle: title, atIndex: index)
         }
         
diff --git a/RxExample/RxExample/Examples/APIWrappers/APIWrappersViewController.swift b/RxExample/RxExample/Examples/APIWrappers/APIWrappersViewController.swift
index 9bc0efb7..4733de1b 100644
--- a/RxExample/RxExample/Examples/APIWrappers/APIWrappersViewController.swift
+++ b/RxExample/RxExample/Examples/APIWrappers/APIWrappersViewController.swift
@@ -14,7 +14,7 @@ import RxCocoa
 #endif
 
 extension UILabel {
-    public override var accessibilityValue: String! {
+    open override var accessibilityValue: String! {
         get {
             return self.text
         }
diff --git a/RxExample/RxExample/Examples/GitHubSearchRepositories/GitHubSearchRepositoriesAPI.swift b/RxExample/RxExample/Examples/GitHubSearchRepositories/GitHubSearchRepositoriesAPI.swift
index c3a380fc..2dd246db 100644
--- a/RxExample/RxExample/Examples/GitHubSearchRepositories/GitHubSearchRepositoriesAPI.swift
+++ b/RxExample/RxExample/Examples/GitHubSearchRepositories/GitHubSearchRepositoriesAPI.swift
@@ -102,7 +102,7 @@ class GitHubSearchRepositoriesAPI {
     // Do we really want to make this example project factory/fascade/service competition? :)
     private let _wireframe: Wireframe
 
-    private let _reachabilityService: ReachabilityService
+    fileprivate let _reachabilityService: ReachabilityService
 
     private init(wireframe: Wireframe, reachabilityService: ReachabilityService) {
         _wireframe = wireframe
@@ -197,7 +197,7 @@ extension GitHubSearchRepositoriesAPI {
     private static let parseLinksPattern = "\\s*,?\\s*<([^\\>]*)>\\s*;\\s*rel=\"([^\"]*)\""
     private static let linksRegex = try! NSRegularExpression(pattern: parseLinksPattern, options: [.allowCommentsAndWhitespace])
 
-    private static func parseLinks(_ links: String) throws -> [String: String] {
+    fileprivate static func parseLinks(_ links: String) throws -> [String: String] {
 
         let length = (links as NSString).length
         let matches = GitHubSearchRepositoriesAPI.linksRegex.matches(in: links, options: NSRegularExpression.MatchingOptions(), range: NSRange(location: 0, length: length))
@@ -223,7 +223,7 @@ extension GitHubSearchRepositoriesAPI {
         return result
     }
 
-    private static func parseNextURL(_ httpResponse: HTTPURLResponse) throws -> URL? {
+    fileprivate static func parseNextURL(_ httpResponse: HTTPURLResponse) throws -> URL? {
         guard let serializedLinks = httpResponse.allHeaderFields["Link"] as? String else {
             return nil
         }
@@ -241,15 +241,15 @@ extension GitHubSearchRepositoriesAPI {
         return nextUrl
     }
 
-    private static func parseJSON(_ httpResponse: HTTPURLResponse, data: Data) throws -> AnyObject {
+    fileprivate static func parseJSON(_ httpResponse: HTTPURLResponse, data: Data) throws -> AnyObject {
         if !(200 ..< 300 ~= httpResponse.statusCode) {
             throw exampleError("Call failed")
         }
 
-        return try JSONSerialization.jsonObject(with: data ?? Data(), options: [])
+        return try JSONSerialization.jsonObject(with: data, options: []) as AnyObject
     }
     
-    private static func parseRepositories(_ json: [String: AnyObject]) throws -> [Repository] {
+    fileprivate static func parseRepositories(_ json: [String: AnyObject]) throws -> [Repository] {
         guard let items = json["items"] as? [[String: AnyObject]] else {
             throw exampleError("Can't find items")
         }
diff --git a/RxExample/RxExample/Examples/GitHubSearchRepositories/UINavigationController+Extensions.swift b/RxExample/RxExample/Examples/GitHubSearchRepositories/UINavigationController+Extensions.swift
index df441a8a..2ef7f583 100644
--- a/RxExample/RxExample/Examples/GitHubSearchRepositories/UINavigationController+Extensions.swift
+++ b/RxExample/RxExample/Examples/GitHubSearchRepositories/UINavigationController+Extensions.swift
@@ -23,8 +23,7 @@ extension UINavigationController {
         return UIBindingObserver(UIElement: self) { navigationController, maybeServiceState in
             // if nil is being bound, then don't change color, it's not perfect, but :)
             if let serviceState = maybeServiceState {
-                let safeState = (serviceState ?? .online)
-                let isOffline = safeState == .offline
+                let isOffline = serviceState == .offline
 
                 self.navigationBar.backgroundColor = isOffline
                     ? Colors.OfflineColor
diff --git a/RxExample/RxExample/Examples/ImagePicker/UIImagePickerController+RxCreate.swift b/RxExample/RxExample/Examples/ImagePicker/UIImagePickerController+RxCreate.swift
index 35342a15..d339015e 100644
--- a/RxExample/RxExample/Examples/ImagePicker/UIImagePickerController+RxCreate.swift
+++ b/RxExample/RxExample/Examples/ImagePicker/UIImagePickerController+RxCreate.swift
@@ -28,7 +28,7 @@ func dismissViewController(_ viewController: UIViewController, animated: Bool) {
 }
 
 extension UIImagePickerController {
-    static func rx_createWithParent(_ parent: UIViewController?, animated: Bool = true, configureImagePicker: (UIImagePickerController) throws -> () = { x in }) -> Observable<UIImagePickerController> {
+    static func rx_createWithParent(_ parent: UIViewController?, animated: Bool = true, configureImagePicker: @escaping (UIImagePickerController) throws -> () = { x in }) -> Observable<UIImagePickerController> {
         return Observable.create { [weak parent] observer in
             let imagePicker = UIImagePickerController()
             let dismissDisposable = imagePicker
diff --git a/RxExample/RxExample/Examples/SimpleTableViewExampleSectioned/SimpleTableViewExampleSectionedViewController.swift b/RxExample/RxExample/Examples/SimpleTableViewExampleSectioned/SimpleTableViewExampleSectionedViewController.swift
index 62959bcd..49ce3acb 100644
--- a/RxExample/RxExample/Examples/SimpleTableViewExampleSectioned/SimpleTableViewExampleSectionedViewController.swift
+++ b/RxExample/RxExample/Examples/SimpleTableViewExampleSectioned/SimpleTableViewExampleSectionedViewController.swift
@@ -70,7 +70,7 @@ class SimpleTableViewExampleSectionedViewController
 
     func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
         let label = UILabel(frame: CGRect.zero)
-        label.text = dataSource.sectionAtIndex(section).model ?? ""
+        label.text = dataSource.sectionAtIndex(section).model
         return label
     }
 }
diff --git a/RxExample/RxExample/Examples/WikipediaImageSearch/ViewModels/SearchResultViewModel.swift b/RxExample/RxExample/Examples/WikipediaImageSearch/ViewModels/SearchResultViewModel.swift
index 1b383d01..300c09de 100644
--- a/RxExample/RxExample/Examples/WikipediaImageSearch/ViewModels/SearchResultViewModel.swift
+++ b/RxExample/RxExample/Examples/WikipediaImageSearch/ViewModels/SearchResultViewModel.swift
@@ -60,7 +60,7 @@ class SearchResultViewModel {
             .observeOn($.backgroundWorkScheduler)
             .map { page in
                 do {
-                    return try parseImageURLsfromHTMLSuitableForDisplay(page.text)
+                    return try parseImageURLsfromHTMLSuitableForDisplay(page.text as NSString)
                 } catch {
                     return []
                 }
diff --git a/RxExample/RxExample/Examples/WikipediaImageSearch/Views/WikipediaSearchCell.swift b/RxExample/RxExample/Examples/WikipediaImageSearch/Views/WikipediaSearchCell.swift
index 6167f1a1..633e29dc 100644
--- a/RxExample/RxExample/Examples/WikipediaImageSearch/Views/WikipediaSearchCell.swift
+++ b/RxExample/RxExample/Examples/WikipediaImageSearch/Views/WikipediaSearchCell.swift
@@ -38,7 +38,7 @@ public class WikipediaSearchCell: UITableViewCell {
                 .drive(self.titleOutlet.rx_text)
                 .addDisposableTo(disposeBag)
 
-            self.URLOutlet.text = viewModel.searchResult.URL.absoluteString ?? ""
+            self.URLOutlet.text = viewModel.searchResult.URL.absoluteString
 
             let reachabilityService = Dependencies.sharedDependencies.reachabilityService
             viewModel.imageURLs
diff --git a/RxExample/RxExample/Examples/WikipediaImageSearch/WikipediaAPI/WikipediaPage.swift b/RxExample/RxExample/Examples/WikipediaImageSearch/WikipediaAPI/WikipediaPage.swift
index 5b943588..faeae484 100644
--- a/RxExample/RxExample/Examples/WikipediaImageSearch/WikipediaAPI/WikipediaPage.swift
+++ b/RxExample/RxExample/Examples/WikipediaImageSearch/WikipediaAPI/WikipediaPage.swift
@@ -22,8 +22,11 @@ struct WikipediaPage {
     
     // tedious parsing part
     static func parseJSON(_ json: NSDictionary) throws -> WikipediaPage {
-        guard let title = json.value(forKey: "parse")?.value(forKey: "title") as? String,
-              let text = json.value(forKey: "parse")?.value(forKey: "text")?.value(forKey: "*") as? String else {
+        guard
+            let parse = json.value(forKey: "parse"),
+            let title = (parse as AnyObject).value(forKey: "title") as? String,
+            let t = (parse as AnyObject).value(forKey: "text"),
+            let text = (t as AnyObject).value(forKey: "*") as? String else {
             throw apiError("Error parsing page content")
         }
         
diff --git a/RxExample/RxExample/Operators.swift b/RxExample/RxExample/Operators.swift
index 1ed6126b..3084753d 100644
--- a/RxExample/RxExample/Operators.swift
+++ b/RxExample/RxExample/Operators.swift
@@ -16,8 +16,7 @@ import UIKit
 
 // Two way binding operator between control property and variable, that's all it takes {
 
-infix operator <-> {
-}
+infix operator <-> : DefaultPrecedence
 
 func nonMarkedText(_ textInput: UITextInput) -> String? {
     let start = textInput.beginningOfDocument
diff --git a/RxExample/RxExample/Services/ActivityIndicator.swift b/RxExample/RxExample/Services/ActivityIndicator.swift
index e678378f..c11e9168 100644
--- a/RxExample/RxExample/Services/ActivityIndicator.swift
+++ b/RxExample/RxExample/Services/ActivityIndicator.swift
@@ -16,7 +16,7 @@ private struct ActivityToken<E> : ObservableConvertibleType, Disposable {
     private let _source: Observable<E>
     private let _dispose: Cancelable
 
-    init(source: Observable<E>, disposeAction: () -> ()) {
+    init(source: Observable<E>, disposeAction: @escaping () -> ()) {
         _source = source
         _dispose = Disposables.create(with: disposeAction)
     }
@@ -49,7 +49,7 @@ public class ActivityIndicator : DriverConvertibleType {
             .distinctUntilChanged()
     }
 
-    private func trackActivityOfObservable<O: ObservableConvertibleType>(_ source: O) -> Observable<O.E> {
+    fileprivate func trackActivityOfObservable<O: ObservableConvertibleType>(_ source: O) -> Observable<O.E> {
         return Observable.using({ () -> ActivityToken<O.E> in
             self.increment()
             return ActivityToken(source: source.asObservable(), disposeAction: self.decrement)
diff --git a/RxExample/RxExample/Services/ImageService.swift b/RxExample/RxExample/Services/ImageService.swift
index 3d99c636..08388a92 100644
--- a/RxExample/RxExample/Services/ImageService.swift
+++ b/RxExample/RxExample/Services/ImageService.swift
@@ -57,7 +57,7 @@ class DefaultImageService: ImageService {
     
     private func _imageFromURL(_ url: URL) -> Observable<Image> {
         return Observable.deferred {
-                let maybeImage = self._imageCache.object(forKey: url) as? Image
+                let maybeImage = self._imageCache.object(forKey: url as AnyObject) as? Image
 
                 let decodedImage: Observable<Image>
                 
@@ -66,7 +66,7 @@ class DefaultImageService: ImageService {
                     decodedImage = Observable.just(image)
                 }
                 else {
-                    let cachedData = self._imageDataCache.object(forKey: url) as? Data
+                    let cachedData = self._imageDataCache.object(forKey: url as AnyObject) as? Data
                     
                     // does image data cache contain anything
                     if let cachedData = cachedData {
@@ -76,7 +76,7 @@ class DefaultImageService: ImageService {
                         // fetch from network
                         decodedImage = self.$.URLSession.rx_data(URLRequest(url: url))
                             .do(onNext: { data in
-                                self._imageDataCache.setObject(data, forKey: url)
+                                self._imageDataCache.setObject(data as AnyObject, forKey: url as AnyObject)
                             })
                             .flatMap(self.decodeImage)
                             .trackActivity(self.loadingImage)
@@ -84,7 +84,7 @@ class DefaultImageService: ImageService {
                 }
                 
                 return decodedImage.do(onNext: { image in
-                    self._imageCache.setObject(image, forKey: url)
+                    self._imageCache.setObject(image, forKey: url as AnyObject)
                 })
             }
     }
diff --git a/RxExample/RxExample/Services/Reachability.swift b/RxExample/RxExample/Services/Reachability.swift
index 464e38b8..0a187f9b 100644
--- a/RxExample/RxExample/Services/Reachability.swift
+++ b/RxExample/RxExample/Services/Reachability.swift
@@ -37,7 +37,7 @@ enum ReachabilityError: Swift.Error {
 
 public let ReachabilityChangedNotification = "ReachabilityChangedNotification"
 
-func callback(_ reachability:SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutablePointer<Void>?) {
+func callback(_ reachability:SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutableRawPointer?) {
     guard  let info = info else { return }
     let reachability = Unmanaged<Reachability>.fromOpaque(info).takeUnretainedValue()
 
@@ -110,11 +110,13 @@ public class Reachability: NSObject {
     public class func reachabilityForInternetConnection() throws -> Reachability {
         
         var zeroAddress = sockaddr_in()
-        zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
+        zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
         zeroAddress.sin_family = sa_family_t(AF_INET)
         
-        guard let ref = withUnsafePointer(&zeroAddress, {
-            SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
+        guard let ref = withUnsafePointer(to: &zeroAddress, {
+            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
+                SCNetworkReachabilityCreateWithAddress(nil, $0)
+            }
         }) else { throw ReachabilityError.failedToCreateWithAddress(zeroAddress) }
         
         return Reachability(reachabilityRef: ref)
@@ -123,15 +125,17 @@ public class Reachability: NSObject {
     public class func reachabilityForLocalWiFi() throws -> Reachability {
 
         var localWifiAddress: sockaddr_in = sockaddr_in(sin_len: __uint8_t(0), sin_family: sa_family_t(0), sin_port: in_port_t(0), sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
-        localWifiAddress.sin_len = UInt8(sizeofValue(localWifiAddress))
+        localWifiAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
         localWifiAddress.sin_family = sa_family_t(AF_INET)
 
         // IN_LINKLOCALNETNUM is defined in <netinet/in.h> as 169.254.0.0
         let address: UInt32 = 0xA9FE0000
         localWifiAddress.sin_addr.s_addr = in_addr_t(address.bigEndian)
 
-        guard let ref = withUnsafePointer(&localWifiAddress, {
-            SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
+        guard let ref = withUnsafePointer(to: &localWifiAddress, {
+            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
+                SCNetworkReachabilityCreateWithAddress(nil, $0)
+            }
         }) else { throw ReachabilityError.failedToCreateWithAddress(localWifiAddress) }
         
         return Reachability(reachabilityRef: ref)
@@ -226,7 +230,7 @@ public class Reachability: NSObject {
     private var reachabilityRef: SCNetworkReachability?
     private let reachabilitySerialQueue = DispatchQueue(label: "uk.co.ashleymills.reachability")
 
-    private func reachabilityChanged(_ flags: SCNetworkReachabilityFlags) {
+    fileprivate func reachabilityChanged(_ flags: SCNetworkReachabilityFlags) {
         if isReachableWithFlags(flags) {
             if let block = whenReachable {
                 block(self)
@@ -267,8 +271,8 @@ public class Reachability: NSObject {
         if let reachabilityRef = reachabilityRef {
             
             var flags = SCNetworkReachabilityFlags(rawValue: 0)
-            let gotFlags = withUnsafeMutablePointer(&flags) {
-                SCNetworkReachabilityGetFlags(reachabilityRef, UnsafeMutablePointer($0))
+            let gotFlags = withUnsafeMutablePointer(to: &flags) {
+                SCNetworkReachabilityGetFlags(reachabilityRef, $0)
             }
             
             if gotFlags {
@@ -348,8 +352,8 @@ public class Reachability: NSObject {
         if let reachabilityRef = reachabilityRef {
             
             var flags = SCNetworkReachabilityFlags(rawValue: 0)
-            let gotFlags = withUnsafeMutablePointer(&flags) {
-                SCNetworkReachabilityGetFlags(reachabilityRef, UnsafeMutablePointer($0))
+            let gotFlags = withUnsafeMutablePointer(to: &flags) {
+                SCNetworkReachabilityGetFlags(reachabilityRef, $0)
             }
             
             if gotFlags {
diff --git a/RxExample/RxExample/iOS/AppDelegate.swift b/RxExample/RxExample/iOS/AppDelegate.swift
index d1bb1578..6b93f620 100644
--- a/RxExample/RxExample/iOS/AppDelegate.swift
+++ b/RxExample/RxExample/iOS/AppDelegate.swift
@@ -12,10 +12,6 @@ import UIKit
 class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
-
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
-        // Override point for customization after application launch.
-        return true
-    }
+    
 }