问题
As of iOS 5 we have access to MPNowPlayingInfoCenter to display info in the lockscreen and in the multimedia controls on the multitasking bar. I have an app that plays local audio files. I want to display info like the artist's name, the album and the artwork on the lockscreen with MPNowPlayingInfoCenter, but the only way to do this (As far as I know) is to use MPMusicPlayerController and get nowPlayingItem... The problem is that MPMusicPlayerController is used to play iPod Music only, and not locally stored files. Is there a way around this in iOS 5?
回答1:
You can create your own NSDictionary and supply that to the MPNowPlayingInfoCenter.
NSArray *keys = [NSArray arrayWithObjects:MPMediaItemPropertyAlbumTitle, MPMediaItemPropertyArtist, ..., nil];
NSArray *values = [NSArray arrayWithObjects:@"Album", @"Artist", ..., nil];
NSDictionary *mediaInfo = [NSDictionary dictionaryWithObjects:values forKeys:keys];
[[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:mediaInfo];
来源：https://stackoverflow.com/questions/9675154/ios-displaying-currently-played-track-info-in-lockscreen