我的代码在这里:在viewDidLoad中:NSNotificationCenter.defaultCenter().addObserver(self,selector:"doneButtonClick",name:MPMoviePlayerWillExitFullscreenNotification,object:nil)我的处理程序:funcdoneButtonClick(sender:NSNotification?){println("finishPreload");}letplayer:MPMoviePlayerController=MPMoviePlayerControlle