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add prototype based cell height row builder

This commit is contained in:
Max Sokolov 2016-05-24 01:13:18 +03:00
parent 0250b08302
commit ba8aa05d8b
6 changed files with 115 additions and 66 deletions
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46
Tablet/ConfigurableCell.swift Normal file
View File

@ -0,0 +1,46 @@
//
// Copyright (c) 2015 Max Sokolov https://twitter.com/max_sokolov
//
// 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 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 UIKit
/**
If you want to delegate your cell configuration logic to cell itself (with your view model or even model) than
just provide an implementation of this protocol for your cell. Enjoy safe-typisation.
*/
public protocol ConfigurableCell {
associatedtype T
static func reusableIdentifier() -> String
static func estimatedHeight() -> Float
static func defaultHeight() -> Float?
func configure(_: T)
}
public extension ConfigurableCell where Self: UITableViewCell {
static func reusableIdentifier() -> String {
return String(self)
}
static func defaultHeight() -> Float? {
return nil
}
}

13
Tablet/TablePrototypeRowBuilder.swift → Tablet/RowBuilder.swift
View File

@ -19,9 +19,16 @@
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import UIKit
import Foundation
public class TablePrototypeRowBuilder<DataType: Hashable, CellType: ConfigurableCell where CellType.T == DataType, CellType: UITableViewCell> : TableBaseRowBuilder<DataType, CellType> {
public protocol RowBuilder {
var reusableIdentifier: String { get }
var numberOfRows: Int { get }
var estimatedRowHeight: Float { get }
func rowHeight(index: Int) -> CGFloat
func invoke(action action: ActionType, cell: UITableViewCell?, indexPath: NSIndexPath, itemIndex: Int, userInfo: [NSObject: AnyObject]?) -> AnyObject?
func registerCell(inTableView tableView: UITableView)
}

4
Tablet/TableDirector.swift
View File

@ -146,7 +146,9 @@ public class TableDirector: NSObject, UITableViewDataSource, UITableViewDelegate
}
public func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return invoke(action: .height, cell: nil, indexPath: indexPath) as? CGFloat ?? UITableViewAutomaticDimension
let builder = builderAtIndexPath(indexPath)
return builder.0.rowHeight(builder.1)
}
public func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

63
Tablet/TableRowBuilder.swift
View File

@ -23,35 +23,6 @@ import Foundation
public typealias ReturnValue = AnyObject?
enum ActionHandler<DataType, CellType> {
case Handler((data: ActionData<DataType, CellType>) -> Void)
case ValueHandler((data: ActionData<DataType, CellType>) -> AnyObject?)
func invoke(data: ActionData<DataType, CellType>) -> ReturnValue {
switch (self) {
case .Handler(let handler):
handler(data: data)
return nil
case .ValueHandler(let handler):
return handler(data: data)
}
}
}
public protocol RowBuilder {
var reusableIdentifier: String { get }
var numberOfRows: Int { get }
var rowHeight: Float { get }
var estimatedRowHeight: Float { get }
func invoke(action action: ActionType, cell: UITableViewCell?, indexPath: NSIndexPath, itemIndex: Int, userInfo: [NSObject: AnyObject]?) -> AnyObject?
func registerCell(inTableView tableView: UITableView)
}
/**
Responsible for building cells of given type and passing items to them.
*/
@ -70,10 +41,6 @@ public class TableBaseRowBuilder<DataType, CellType where CellType: UITableViewC
return 44
}
public var rowHeight: Float {
return 0
}
public init(item: DataType, id: String? = nil) {
reusableIdentifier = id ?? String(CellType)
@ -89,6 +56,10 @@ public class TableBaseRowBuilder<DataType, CellType where CellType: UITableViewC
}
}
public func rowHeight(index: Int) -> CGFloat {
return 0
}
// MARK: - Chaining actions -
public func action(key: String, handler: (data: ActionData<DataType, CellType>) -> Void) -> Self {
@ -170,6 +141,32 @@ public class TableRowBuilder<DataType, CellType: ConfigurableCell where CellType
}
}
public class TablePrototypeRowBuilder<DataType: Hashable, CellType: ConfigurableCell where CellType.T == DataType, CellType: UITableViewCell> : TableBaseRowBuilder<DataType, CellType> {
private var cachedHeights = [Int: CGFloat]()
private var prototypeCell: CellType?
public override func rowHeight(index: Int) -> CGFloat {
guard let cell = prototypeCell else { return 0 }
let item = items[index]
if let height = cachedHeights[item.hashValue] {
return height
}
cell.configure(item)
cell.setNeedsLayout()
cell.layoutIfNeeded()
let height = cell.contentView.systemLayoutSizeFittingSize(UILayoutFittingCompressedSize).height + 1
cachedHeights[item.hashValue] = height
return height
}
}
public func +=<DataType, CellType>(left: TableBaseRowBuilder<DataType, CellType>, right: DataType) {
left.append(items: [right])
}

41
Tablet/Tablet.swift
View File

@ -69,6 +69,23 @@ public class ActionData<DataType, CellType> {
}
}
enum ActionHandler<DataType, CellType> {
case Handler((data: ActionData<DataType, CellType>) -> Void)
case ValueHandler((data: ActionData<DataType, CellType>) -> AnyObject?)
func invoke(data: ActionData<DataType, CellType>) -> ReturnValue {
switch (self) {
case .Handler(let handler):
handler(data: data)
return nil
case .ValueHandler(let handler):
return handler(data: data)
}
}
}
/**
A custom action that you can trigger from your cell.
You can eacily catch actions using a chaining manner with your row builder.
@ -96,27 +113,3 @@ public class Action {
}
}
/**
If you want to delegate your cell configuration logic to cell itself (with your view model or even model) than
just provide an implementation of this protocol for your cell. Enjoy safe-typisation.
*/
public protocol ConfigurableCell {
associatedtype T
static func reusableIdentifier() -> String
static func estimatedHeight() -> Float
static func defaultHeight() -> Float?
func configure(_: T)
}
public extension ConfigurableCell where Self: UITableViewCell {
static func reusableIdentifier() -> String {
return String(self)
}
static func defaultHeight() -> Float? {
return nil
}
}

14
Tablet/Tablet.xcodeproj/project.pbxproj
View File

@ -7,7 +7,8 @@
objects = {
/* Begin PBXBuildFile section */
501C70391CF387090099458A /* TablePrototypeRowBuilder.swift in Sources */ = {isa = PBXBuildFile; fileRef = 501C70381CF387090099458A /* TablePrototypeRowBuilder.swift */; };
DA08A04F1CF3AB0C00BBF1F8 /* ConfigurableCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = DA08A04E1CF3AB0C00BBF1F8 /* ConfigurableCell.swift */; };
DA08A0511CF3AB6100BBF1F8 /* RowBuilder.swift in Sources */ = {isa = PBXBuildFile; fileRef = DA08A0501CF3AB6100BBF1F8 /* RowBuilder.swift */; };
DAC2D6741C9D743D009E9C19 /* Tablet.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = DAC2D6691C9D743D009E9C19 /* Tablet.framework */; };
DAC2D6871C9D7517009E9C19 /* Tablet.h in Headers */ = {isa = PBXBuildFile; fileRef = DAC2D6851C9D7517009E9C19 /* Tablet.h */; settings = {ATTRIBUTES = (Public, ); }; };
DAC2D6901C9D799E009E9C19 /* TableDirector.swift in Sources */ = {isa = PBXBuildFile; fileRef = DAC2D68C1C9D799E009E9C19 /* TableDirector.swift */; };
@ -28,7 +29,8 @@
/* End PBXContainerItemProxy section */
/* Begin PBXFileReference section */
501C70381CF387090099458A /* TablePrototypeRowBuilder.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TablePrototypeRowBuilder.swift; sourceTree = "<group>"; };
DA08A04E1CF3AB0C00BBF1F8 /* ConfigurableCell.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ConfigurableCell.swift; sourceTree = "<group>"; };
DA08A0501CF3AB6100BBF1F8 /* RowBuilder.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = RowBuilder.swift; sourceTree = "<group>"; };
DAC2D6691C9D743D009E9C19 /* Tablet.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Tablet.framework; sourceTree = BUILT_PRODUCTS_DIR; };
DAC2D6731C9D743D009E9C19 /* TabletTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = TabletTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
DAC2D6841C9D7517009E9C19 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@ -91,11 +93,12 @@
DAC2D68B1C9D7990009E9C19 /* Classes */ = {
isa = PBXGroup;
children = (
DAC2D68F1C9D799E009E9C19 /* Tablet.swift */,
DA08A04E1CF3AB0C00BBF1F8 /* ConfigurableCell.swift */,
DA08A0501CF3AB6100BBF1F8 /* RowBuilder.swift */,
DAC2D68C1C9D799E009E9C19 /* TableDirector.swift */,
DAC2D68D1C9D799E009E9C19 /* TableRowBuilder.swift */,
DAC2D68E1C9D799E009E9C19 /* TableSectionBuilder.swift */,
501C70381CF387090099458A /* TablePrototypeRowBuilder.swift */,
DAC2D68F1C9D799E009E9C19 /* Tablet.swift */,
);
name = Classes;
sourceTree = "<group>";
@ -220,8 +223,9 @@
files = (
DAC2D6901C9D799E009E9C19 /* TableDirector.swift in Sources */,
DAC2D6921C9D799E009E9C19 /* TableSectionBuilder.swift in Sources */,
DA08A0511CF3AB6100BBF1F8 /* RowBuilder.swift in Sources */,
DA08A04F1CF3AB0C00BBF1F8 /* ConfigurableCell.swift in Sources */,
DAC2D6911C9D799E009E9C19 /* TableRowBuilder.swift in Sources */,
501C70391CF387090099458A /* TablePrototypeRowBuilder.swift in Sources */,
DAC2D6931C9D799E009E9C19 /* Tablet.swift in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;