ios - 没有调用 Swift Delegate 来关闭 UIViewController

Question

我有一个包含游戏 Controller 的 CenterViewController。我想添加/删除用户在玩游戏时可以轻松引用的 RulesViewController。

RulesViewController 出现并被正常关闭。但是永远不会调用 delegate.continueGame 方法。我已将协议(protocol)添加到 RulesViewController。我已经向 CenterViewController 添加了一个类扩展来处理委托(delegate)。我错过了什么？？非常感谢任何帮助...

Class CenterViewController: UIViewController {

private var controller: GameController

required init(coder aDecoder: NSCoder){
  controller = GameController()    
}

override func viewDidLoad() {
// add all the views here
let gameView = UIView(frame: CGRectMake(0,0, ScreenWidth, ScreenHeight))
    self.view.addSubview(gameView)
    controller.gameView = gameView
}

// method called when rules button on the gameView is pressed
func showRulesForLevel () {
    let rulesViewController = storyboard!.instantiateViewControllerWithIdentifier("RulesViewController") as! RulesViewController
    presentViewController(rulesViewController, animated: true, completion: nil)

// extension to the Class to handle the delegate
extension CenterViewController: RulesViewControllerDelegate {

//func to continue the game
func continueGame() {
    controller.gameView.userInteractionEnabled = true
}
}

在我的 RulesViewController 中:

protocol RulesViewControllerDelegate {
func continueGame()
}

class RulesViewController: UIViewController {

var delegate: RulesViewControllerDelegate?

override func viewDidLoad() {
    super.viewDidLoad()

// code to add a continue button which when pressed calls continueGameAction method 
}

func continueGameAction() {
    // dismiss the UIViewController so game can continue
    self.dismissViewControllerAnimated(true, completion: nil)

    // continue the game in CenterViewController
    delegate?.continueGame()
}
}

但是 delegate?.continueGame() 从未被调用。

Answer 1

好的，所以您需要像这样在 showRulesForLevel 方法中设置委托(delegate):

rulesViewController.delegate = self

:)