使用MPMusicPlayerController播放MPMediaItemCollection，如何獲得播放結束時的事件

Question

我使用MPMusicPlayerController播放MPMediaItems在MPMediaItemCollection。當MPMediaItem完成比賽時，我該如何射門？

謝謝！ InterDev中

Answer 1

註冊MPMusicPlayerControllerPlaybackStateDidChangeNotification通知：

[notificationCenter addObserver:self selector:@selector(handlePlaybackStateChanged:) name:MPMusicPlayerControllerPlaybackStateDidChangeNotification object:self.musicPlayer]; 

，並告訴你musicPlayerController產生這些通知：

[self.musicPlayerController beginGeneratingPlaybackNotifications]; 

在handlePlaybackStateChanged:您可以檢查musicPlayerController的playbackState屬性：

- (void)handlePlaybackStateChanged:(NSNotitication*)notification 
{ 
    if (self.musicPlayerController.playbackState == MPMusicPlaybackStateStopped || 
     self.musicPlayerController.playbackState == MPMusicPlaybackStateInterrupted || 
     self.musicPlayerController.playbackState == MPMusicPlaybackStatePaused) { 
     // do your stuff 
    } 
}