跟踪iPhone / iPad上播放一半的媒体项目的位置

Question

I would like to track the last position of a media item (song or podcast). I can access the total duration using the MPMediaItemPropertyPlaybackDuration property of the MPMediaItem. I am interested in way to store and track the last played position.

Does every player do this on their own ? Would I get it for free if I just play entities with the MediaPlayer ?

I have not hooked media player to play items yet, I would like to understand if I need to implement my own bookmarking method.

Answer 1

[audioPlayer currentPlaybackTime]  

Will give you the current playback time. I have a resume feature on a podcast player and I simply watch for interruptions with:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playPlaybackStateChanged:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:self.audioPlayer];

and then inside that callback function, check the state:

 if(self.audioPlayer.playbackState == MPMoviePlaybackStateInterrupted)

and record the playback time on interruption...