title: how to use AVQueuePlayer in AVPlayer
body: <p>currently i am using following codes to play song </p>
  
  <pre><code>playerItem = [AVPlayerItem playerItemWithURL:[song valueForProperty:MPMediaItemPropertyAssetURL]];
      [_avPlayer replaceCurrentItemWithPlayerItem:playerItem];
  </code></pre>
  
  <p>here i am using AVPlayer for playing audio files, but my requirement is need to play group (NSArray) of song continuously(currently player stop after playing one song).I heared about AVQueuePlayer but don't know how to use is it with avplayer if anyone know this please help me</p>