iphone - 使用 MPMusicPlayerController 播放 MPMediaItemCollection，如何获取播放结束时的事件

Question

我正在使用MPMusicPlayerController来玩MPMediaItems. MPMediaItemCollections 播放完毕后如何触发事件MPMediaItem？

Answer 1

注册MPMusicPlayerControllerPlaybackStateDidChangeNotification通知：

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

并告诉你的 musicPlayerController 生成这些通知：

[self.musicPlayerController beginGeneratingPlaybackNotifications];

handlePlaybackStateChanged:你可以检查musicPlayerController的属性playbackState：

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