title: How to properly delete/release AVPlayer/AVPlayerItem?
body: <p>I am implementing a video app, that lists video and able to stream or watch local videos. If I try to watch videos with my player that inherits from AVPlayer, a lot of threads initated, after 15-20 times, the system does not alloc the AVPlayer well and, even if I do not get any error, the player view is blank and nothing happening...I need to kill app to restore.</p>
  
  <p>How to deal with it?</p>
  
  <p>Thanks in advance</p>