title: AirPlay button on custom view
body: <p>4.3 finally :) I am searching right now how to add air play button to custom view. I have MPMoviePlayer that load movie. I disabled standard controls and added overlay view with my custom play, pause, stop, volume buttons.
  If anybody know how to add button that will be air play please share knowledge?
  I cant't find what notification to send, what to listen...:(</p>