Background Audio - Image on Lock Screen

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