iOS 8.4 MPNowPlayingInfoCenter跳跃/prev消失

Question

我正在开发一个音乐播放应用程序，在以前的iOS版本中，媒体播放器会显示播放/暂停以及跳过按钮和prev按钮。现在，使用8.4更新，所显示的只是播放/暂停。我正在按照通常的方式更新MPNowPlayingInfoCenter：

NSDictionary* nowPlayingInfo = @{
    MPMediaItemPropertyTitle:[self.currentSong title],
    MPMediaItemPropertyArtist:[self.currentSong artist],
    MPMediaItemPropertyPlaybackDuration:[NSNumber numberWithDouble:(double) self.duration],
    MPNowPlayingInfoPropertyElapsedPlaybackTime: [NSNumber numberWithDouble:(double)self.currentPlaybackTime],
    MPNowPlayingInfoPropertyPlaybackRate: self.isPlaying ? @1.0 : @0.0,
    MPMediaItemPropertyArtwork: mediaPlayerArtwork,
    MPNowPlayingInfoPropertyPlaybackQueueIndex: [NSNumber numberWithInteger:playQueue.queuePosition],
    MPNowPlayingInfoPropertyPlaybackQueueCount: [NSNumber numberWithInteger:playQueue.queueIDs.count] };
[[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:nowPlayingInfo];

但结果是..。

​

和

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谢谢你的帮助！

Answer 1

为了返回下一个按钮和prev按钮，您需要添加：

[[MPRemoteCommandCenter sharedCommandCenter].nextTrackCommand addTarget:self action:@selector(remoteNextPrevTrackCommandReceived:)];
[[MPRemoteCommandCenter sharedCommandCenter].previousTrackCommand addTarget:self action:@selector(remoteNextPrevTrackCommandReceived:)];

我在AppDelegate的

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

如果您已经接收到远程事件，则操作方法可以为空：

-(void) remoteNextPrevTrackCommandReceived:(id)event {}