title: AVPlayerViewController full screen issue (iOS 9 beta 2)
body: <p>I am migrating from MPMoviePlayer to AVPlayer/AVPlayerViewController. Everything works fine, except that when I zoom to full screen via the on screen control, after the movie finished playing, the full screen mode does not go away and stuck there. I am running this on iOS 9 beta 2.</p>
  
  <p>Here's my code:</p>
  
  <pre><code>AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:url];
  self.playerController.player = [AVPlayer playerWithURL:url];
  self.playerController.view.frame = self.imageView.frame;
  
  [self.view addSubview:self.playerController.view];
  [self.playerController.player play];
  
  NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
  [notificationCenter addObserver:self selector:@selector(stopVideo:) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
  </code></pre>
  
  <p>When the movie stop, I run the following stopVideo code:</p>
  
  <pre><code>[self.playerController.player pause];
  [self.playerController.view removeFromSuperview];
  </code></pre>
  
  <p>Is it my code or is this an iOS 9 bug?</p>