title: How to implement seeking from ControlCenter?
body: <p>I'm trying to implement support for the playback controls available in Control Center. For play/pause etc I'm handling <code>UIEventTypeRemoteControl</code> events and looking for subtype <code>UIEventSubtypeRemoteControlPlay</code> / <code>UIEventSubtypeRemoteControlPause</code>, etc.</p>
  
  <p>However when I try and drag the playback position I don't get any events. Is there a different method for handling seeking?</p>