一个 Swift 库，使用闭包实现 UIKit 等组件的 delegate 和 dataSource 方法

Xcode 8, Swift 3.0, iOS 8+

所有方法名称以ce_开头

// UITableView
let kCellReuseIdentifier = "MYCELL"
tableView.register(UITableViewCell.self, forCellReuseIdentifier: kCellReuseIdentifier)
tableView.ce_numberOfSections_in { (tableView) -> Int in
    return 3
}.ce_tableView_numberOfRowsInSection { (tableView, section) -> Int in
    return 5
}.ce_tableView_cellForRowAt { (tableView, indexPath) -> UITableViewCell in
    return tableView.dequeueReusableCell(withIdentifier: kCellReuseIdentifier, for: indexPath)
}.ce_tableView_willDisplay { (tableView, cell, indexPath) in
    cell.textLabel?.text = "\(indexPath.section) - \(indexPath.row)"
}.ce_scrollViewDidScroll { (scrollView) in
    print(scrollView.contentOffset)
}

// UIControl
button.ce_addControlEvents(.touchDown) { (control, touches) in
    print("TouchDown")
}.ce_addControlEvents(.touchUpInside) { (control, touches) in
    print("TouchUpInside")
}
button.ce_removeControlEvents(.touchDown)

textField.ce_addControlEvents([.editingChanged, .editingDidBegin]) { (control, touches) in
    print("TextChanged")
}

// UIBarButtonItem
let barButtonItem = UIBarButtonItem()
barButtonItem.action { (barButtonItem) in
    print("UIBarButtonItem action")
}

// UIGestureRecognizer
let gestureRecognizer = UIPanGestureRecognizer { (gestureRecognizer) in
    print(gestureRecognizer.state.rawValue)
}
self.view.addGestureRecognizer(gestureRecognizer)

将Centipede目录复制到您的项目中及可。

platform :ios, '8.0'
use_frameworks!

pod 'Centipede'

github "klaus01/Centipede"

使用闭包需要注意循环引用问题，Swift 使用 weak 或 unowned 解决循环引用问题

在实现 delegate 的各个方法时：

• 方法遍布整个 ViewController，散乱。
• 具体的实现与成员变量被分开了，阅读时需要分开查看。
• 如果 ViewController 中实现多个 UITableViewDataSource 时，方法中需要判断组件来做出反应。如下：（这很丑）

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return tableView == leftTableView ? leftDatas.count : rightDatas.count
}

这些情况让代码不易阅读和维护。

希望：

• 代码连续。组件的构造、样式设置和各 delegate 实现方法可写在一个位置。
• 独立。有多个 UITableView 时，tableViewA 和tableViewB 的 delegate 方法实现是独立的，互不干扰。

• AVFoundation/AVAudioPlayer
• AVFoundation/AVAudioRecorder
• AVFoundation/AVSpeechSynthesizer
• CoreBluetooth/CBCentralManager
• CoreBluetooth/CBPeripheral
• CoreBluetooth/CBPeripheralManager
• CoreLocation/CLLocationManager
• ExternalAccessory/EAAccessory
• ExternalAccessory/EAWiFiUnconfiguredAccessoryBrowser
• Foundation/NSKeyedArchiver
• Foundation/NSKeyedUnarchiver
• Foundation/NSMetadataQuery
• Foundation/NSUserActivity
• Foundation/XMLParser
• GameKit/GKMatch
• GLKit/GLKView
• GLKit/GLKViewController
• iAd/ADBannerView
• iAd/ADInterstitialAd
• MapKit/MKMapView
• MediaPlayer/MPMediaPickerController
• MediaPlayer/MPPlayableContentManager
• MultipeerConnectivity/MCAdvertiserAssistant
• MultipeerConnectivity/MCBrowserViewController
• MultipeerConnectivity/MCNearbyServiceAdvertiser
• MultipeerConnectivity/MCNearbyServiceBrowser
• MultipeerConnectivity/MCSession
• PassKit/PKAddPassesViewController
• PassKit/PKPaymentAuthorizationViewController
• PushKit/PKPushRegistry
• QuartzCore/CAAnimation
• QuartzCore/CALayer
• QuickLook/QLPreviewController
• SceneKit/SCNProgram
• SpriteKit/SKScene
• StoreKit/SKProductsRequest
• StoreKit/SKRequest
• StoreKit/SKStoreProductViewController
• UIKit/NSLayoutManager
• UIKit/NSTextStorage
• UIKit/UIActionSheet
• UIKit/UIAlertView
• UIKit/UICollectionView
• UIKit/UIDocumentInteractionController
• UIKit/UIDocumentMenuViewController
• UIKit/UIDocumentPickerViewController
• UIKit/UIDynamicAnimator
• UIKit/UIGestureRecognizer
• UIKit/UIImagePickerController
• UIKit/UINavigationBar
• UIKit/UINavigationController
• UIKit/UIPageViewController
• UIKit/UIPickerView
• UIKit/UIPopoverController
• UIKit/UIPopoverPresentationController
• UIKit/UIPresentationController
• UIKit/UIPrinterPickerController
• UIKit/UIPrintInteractionController
• UIKit/UIScrollView
• UIKit/UISearchBar
• UIKit/UISearchController
• UIKit/UISplitViewController
• UIKit/UITabBar
• UIKit/UITabBarController
• UIKit/UITableView
• UIKit/UITextField
• UIKit/UITextView
• UIKit/UIToolbar
• UIKit/UIVideoEditorController
• UIKit/UIViewController
• UIKit/UIWebView

• UIControl
  • UIButton
  • UIDatePicker
  • UIPageControl
  • UIRefreshControl
  • UISegmentedControl
  • UISlider
  • UIStepper
  • UISwitch
  • UITextField
• UIBarButtonItem
• UIGestureRecognizer

Centipede is released under the MIT license. See LICENSE for details.