You can display an AirPlay picker view (if AirPlay is available) like so:
MPVolumeView *volumeView = [ [MPVolumeView alloc] init] ;
[volumeView setShowsVolumeSlider:NO];
[volumeView sizeToFit];
[view addSubview:volumeView];
The MPVolumeView
displays all the available AirPlay devices. The code above disables the volume slider, which you may or may not want to do. What you can't do is get programatic access to AirPlay device information.