无法将“UIView"类型的值转换为“SKView"

问题描述

我有两个视图控制器，一个是 GameViewController(这个是在我开始一个新的游戏项目时由 xcode 创建的)和 MenuViewController.最后一个向用户展示了一个按钮开始游戏".按下按钮时，应显示 GameViewController 视图.但是，程序崩溃了，而是在标题中显示消息.

I have two View Controllers, one is GameViewController (this one is created by xcode when I start a new game project) and MenuViewController. This last one presents the user with a button 'start game.' When the button is pressed, the GameViewController view should be presented. However, the program crashes instead with the message in the title.

在MenuViewController"中我有

In 'MenuViewController' I have

func startGameButtonAction(sender:UIButton!) {

        let gameViewController = GameViewController()
        self.presentViewController(gameViewController, animated: true, completion: nil)

}

在GameViewController"中我有

In 'GameViewController' I have

 override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(true)

        let skView = self.view as! SKView // crash occurs here
 }

我需要 skView 是一个 SKView，因为 GameViewController 提供了一个 SKScene.

I need the skView to be an SKView because GameViewController presents an SKScene.

推荐答案

如果你使用storyboard，你可以将View的自定义类设置为SKView，如下所示:

If you user storyboard, you can set View's custom class to SKView, like this:

然后:

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