The following code enables AirPlay and adds an AirPlay icon to the AVPlayer view:
playerViewController.player?.allowsExternalPlayback = true
var volumeView = MPVolumeView()
volumeView.showsVolumeSlider = false
volumeView.sizeToFit()
playerViewController.view.addSubview(volumeView)
playerViewController.player!.play()
However, it does it in the wrong location - the AirPlay icon appears in the top left. How can I ensure it appears next to the volume controls?