仅在Youtube全屏时旋转允许

Question

我有一个只在Portrait中显示的应用程序。在此应用程序中是一个带有youtube嵌入视频的UIWebView。触摸后，此视频开始全屏播放。当这个全屏开始时，我想允许旋转。然而，当它结束时，我希望这回到只允许肖像。我已经尝试了以下结果：

在我的viewController的viewDidLoad中：

 //Set listeners for video maximize
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("videoFull:"), name: "UIMoviePlayerControllerDidEnterFullscreenNotification", object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("videoMinimize:"), name: "UIMoviePlayerControllerWillExitFullscreenNotification", object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("videoFull:"), name: "MPMoviePlayerWillEnterFullscreenNotification", object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("videoMinimize:"), name: "MPMoviePlayerWillExitFullscreenNotification", object: nil)

在我的viewController中：

//Handles video full screen
func videoFull(notification:NSNotification){
    (UIApplication.sharedApplication().delegate as WGMAppDelegate).videoFullscreen = true
}

//Handles video minimizes
func videoMinimize(notificaiton:NSNotification){
    (UIApplication.sharedApplication().delegate as WGMAppDelegate).videoFullscreen = false
}

在我的app delegate中：

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> Int {
        if(videoFullscreen){
            return Int(UIInterfaceOrientationMask.All.rawValue)
        }
        else{
            return Int(UIInterfaceOrientationMask.Portrait.rawValue)
        }
    }

除了我的通知代码永远不会被调用，因此将videoFullscreen变量保持为false。