ios - SKView!提交时发现为零

Question

class MyClass: UIViewController {

var playerViewController = AVPlayerViewController()
var playerView = AVPlayer()
var playerTimer = NSTimer()


override func viewDidAppear(animated:Bool) {
    super.viewDidAppear(true)
    presentViewController(GameViewController1(), animated: false, completion: nil)
    let fileURL = NSURL(fileURLWithPath: "SomeFile.mp4")

    playerView = AVPlayer(URL: fileURL)

    playerViewController.player = playerView

    self.presentViewController(playerViewController, animated: false){
        self.playerViewController.showsPlaybackControls = false
        self.playerViewController.player?.play()
        self.playerTimer = NSTimer.scheduledTimerWithTimeInterval(4.2, target: self, selector:Selector("stopAfter4seconds:"), userInfo: nil, repeats: false)
    }
}
func stopAfter4seconds(timer: NSTimer){
    playerViewController.player = nil
    playerViewController.removeFromParentViewController()
    playerTimer.invalidate()
    playerViewController.presentViewController(GameViewController1(), animated: false, completion: nil)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()


}

}

在“MyClass”(上方类(class))上播放视频后

然后，我删除 View 并显示具有 GameScene 的 GameContollerView1。
(下面的类)

class GameViewController1: UIViewController, ADBannerViewDelegate {


@IBOutlet var skView: SKView!

override func viewDidLoad() {
    super.viewDidLoad()


    if skView.scene == nil {
        let scene = GameScene(size: skView.bounds.size)
        skView.presentScene(scene)
    }
}

override func shouldAutorotate() -> Bool {
    return true
}

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    if UIDevice.currentDevice().userInterfaceIdiom == .Phone {
        return UIInterfaceOrientationMask.AllButUpsideDown
    } else {
        return UIInterfaceOrientationMask.All
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

override func prefersStatusBarHidden() -> Bool {
    return true
}

}

我最初的问题是，当我呈现“GameViewController1”类时，出现错误:

 fatal error: unexpectedly found nil while unwrapping an Optional value
  (lldb) 

在这一行:

if skView.scene == nil {

所以它告诉我我的 SKView!是 nil，正如你从我的 if 语句中看到的，这正是我一直在寻找的。

最奇怪的部分是，当我跳过“MyClass”并首先将 StoryBoard 入口点指向 GameViewContoller1 时，所有代码都能正确播放。

AVPlayer() 与此有关吗？从逻辑上讲，我的代码应该可以工作，但由于某种未知的原因......事实并非如此。任何帮助将不胜感激。

Answer 1

OP 答案:最终返回到 AppDelegate 并从那里调用 GameViewController1 类。花了一些时间才弄清楚，但这是为我完成的整体代码:

let gameScene = UIStoryboard(name: "Main", bundle:nil).instantiateViewControllerWithIdentifier("GameViewController1") as UIViewController
    let appDelegate = (UIApplication.sharedApplication().delegate as! AppDelegate)
    appDelegate.window?.rootViewController = gameScene

我将此代码输入到 ViewDidDisappear 中，以使我的 AVplayer 消失并加载新 View :)..你不知道这花了我多长时间。

提示:请确保将其放入某种 ViewDidLoad 或 View 方法之一中，否则您将收到错误“预期声明”