iOS，当音乐改变时读取标题音乐ipod答案

【问题标题】：iOS , read title music ipod when the music is changeiOS，当音乐改变时读取标题音乐ipod
【发布时间】：2014-01-29 19:25:44
【问题描述】：

我想从当前正在播放的 ipod 音乐中获取标题和艺术家姓名但我想当音乐改变时我可以检测到 UIlabel 改变

这里是代码：

 - (IBAction)getTitlemusic
{
   // MPMediaItem * currentItem = self.musicPlayer.nowPlayingItem;


    MPMediaItem * song = [[MPMusicPlayerController iPodMusicPlayer] nowPlayingItem];
    NSString * album = [song valueForProperty:MPMediaItemPropertyAlbumTitle];
    NSString * title = [song valueForProperty:MPMediaItemPropertyTitle];
    NSString * artist = [song valueForProperty:MPMediaItemPropertyArtist];


    NSLog(@"%@,%@,%@", album,title,artist);

    songlabel.text = [NSString stringWithFormat:@"%@",album ];

    arttistlabel.text =  [NSString stringWithFormat:@"%@\r%@",title,artist];


      [self performSelector:@selector(getTitlemusic) withObject:nil afterDelay:10.0f];

}

我知道计时器和延迟不是个好主意

【问题讨论】：

标签： nsnotificationcenter ipod nsnotifications mpmusicplayercontroller mpmediaitem

【解决方案1】：

MPMusicPlayerController *player = [MPMusicPlayerController iPodMusicPlayer];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(getTitlemusic)
                                             name:MPMusicPlayerControllerNowPlayingItemDidChangeNotification
                                           object:player];
[player beginGeneratingPlaybackNotifications];

使用此代码

【讨论】：