Background Audio - Image on Lock Screen - iphone

Question

There is a way to add an image to the lock screen for Background Audio, along with setting the Track and Artist name. It was also mentioned in a WWDC 2011 video, but nothing specific to go off of. I have looked everywhere in the docs and cannot find it. I know it is an iOS5 only thing, and Spotify's newest version has this feature. Does anyone know where they can point me in the right direction?
Thank You,
Matthew

Answer 1

Here's an answer I found for you:
(1) You must handle remote control events. You can't be the Now
Playing app unless you do. (See the AudioMixer (MixerHost) sample) code.)
(2) Set the Now Playing info:
MPNowPlayingInfoCenter *infoCenter = [MPNowPlayingInfoCenter defaultCenter];
infoCenter.nowPlayingInfo =
[NSDictionary dictionaryWithObjectsAndKeys:#"my title", MPMediaItemPropertyTitle,
#"my artist", MPMediaItemPropertyArtist,
nil];
This is independent of whichever API you are using to play audio or
video.

Answer 2

as per Michaels answer above, simply append
#{MPMediaItemPropertyArtwork: [[MPMediaItemArtwork alloc] initWithImage:[UIImage ...]]}
to the nowPlayingInfo dict
the full options of available keys are ...
// MPMediaItemPropertyAlbumTitle
// MPMediaItemPropertyAlbumTrackCount
// MPMediaItemPropertyAlbumTrackNumber
// MPMediaItemPropertyArtist
// MPMediaItemPropertyArtwork
// MPMediaItemPropertyComposer
// MPMediaItemPropertyDiscCount
// MPMediaItemPropertyDiscNumber
// MPMediaItemPropertyGenre
// MPMediaItemPropertyPersistentID
// MPMediaItemPropertyPlaybackDuration
// MPMediaItemPropertyTitle

Answer 3

To make controls work....
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
- (void)viewWillDisappear:(BOOL)animated {
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
[super viewWillDisappear:animated];
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {
if (receivedEvent.type == UIEventTypeRemoteControl) {
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlPlay:
[player play];
break;
case UIEventSubtypeRemoteControlPause:
[player pause];
break;
case UIEventSubtypeRemoteControlTogglePlayPause:
if (player.playbackState == MPMoviePlaybackStatePlaying) {
[player pause];
}
else {
[player play];
}
break;
default:
break;
}
}
}
It only works on a real iOS Device, not on the simulator