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我正在尝试从根视图控制器 -> 游戏视图控制器开始，然后在 gameviewcontroller 上显示游戏场景，然后转到不同的场景（游戏结束场景），然后 unwindsegue 到根视图控制器，然后重复。问题是，当我第二次尝试使用游戏视图控制器时，它会在游戏视图控制器尝试呈现 skscene（游戏玩法）后抛出 exc_bad_access。没有堆栈跟踪，只有 appdelegate 第一行的 exc_bad_access。当我运行带有僵尸的仪器时，该应用程序不会抛出任何错误，它按预期工作。放置异常断点似乎没有任何作用。我不确定我的错误在哪里或是什么。

这是我的根视图控制器：

class RootViewController: UIViewController {
    //view that we present

    @IBOutlet weak var MyLabel: UILabel?


    var preload = true

    override func viewDidLoad() {
        super.viewDidLoad()
        if preload {
        textures.atlas.preloadWithCompletionHandler( {
            print("finished preloading")
        })
        }
    }
    var lives: Int = 3

    @IBOutlet weak var MyStepper: UIStepper!

    @IBAction func didChangeValue(sender: UIStepper) {
        lives = Int(sender.value)
        MyLabel?.text = "lives: \(Int(sender.value).description)"
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        originalLives = lives
        enemyLives = lives
        heroLives = lives
        print("seguing")

    }

    @IBAction func goBack(unwindSegue: UIStoryboardSegue) {
        preload = false
    }

}


        //Controls a /view/ that displays scenes.
class GameViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        //initialize the scene to fill screen
        let myScene = GameScene(size: self.view.bounds.size)
        myScene.scaleMode = .AspectFill

        let theskView = self.view as! SKView
        self.view.multipleTouchEnabled = true

        // theskView.frameInterval = 2
//        
//        theskView.showsPhysics = true
//        theskView.showsFPS = true
//        theskView.showsNodeCount = true
//        theskView.showsDrawCount = true


        theskView.ignoresSiblingOrder = true

        myScene.scaleMode = .AspectFill

        myScene.size = theskView.bounds.size

        myScene.controller = self
        theskView.presentScene(myScene)
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if let dvc = segue.destinationViewController as? RootViewController {
        }
    }
    deinit {
        print("game view dies")
    }
}

场景很简单：这被称为（从第一个 skscene 开始）进入游戏结束场景

  func gameOver(won: String) {
    self.removeAllChildren()
    let sceneToGoTo = GameOverScene()
    sceneToGoTo.won = won == "nudgit" ? true : false

    let theskView = self.view! as SKView
    theskView.multipleTouchEnabled = true

    // theskView.frameInterval = 2

    theskView.ignoresSiblingOrder = true

    sceneToGoTo.scaleMode = .AspectFill

    sceneToGoTo.size = theskView.bounds.size
    sceneToGoTo.controller = controller
    theskView.presentScene(nil)
    theskView.presentScene(sceneToGoTo)
}

然后游戏结束场景从触摸开始：

 override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        controller?.performSegueWithIdentifier("segue", sender: self)
    }

“控制器”在哪里？是游戏视图控制器的弱变量

我检查了 deinits：两个游戏场景都正确取消初始化，并且当它展开到根视图控制器时，gameViewController 正确取消初始化。我不知道我能做些什么来解决这个问题。

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