ios – MPRemoteCommandCenter暂停/播放按钮没有切换？

- (void)setupMPRemoteCommandCenter{
    MPRemoteCommandCenter *commandCenter = [MPRemoteCommandCenter sharedCommandCenter];

    MPRemoteCommand *play = [commandCenter playCommand];
    [play setEnabled:YES];
    [play addTarget:self action:@SELEctor(playAudio:)];

    MPRemoteCommand *pause = [commandCenter pauseCommand];
    [pause setEnabled:YES];
    [pause addTarget:self action:@SELEctor(playAudio:)];


    [commandCenter.skipBACkWARDCommand setPreferredIntervals:@[@30.0]];
    MPRemoteCommand *skipBACkWARDs = [commandCenter skipBACkWARDCommand];
    [skipBACkWARDs setEnabled:YES];
    [skipBACkWARDs addTarget:self action:@SELEctor(skipBACkWARDEvent:)];

    [commandCenter.skipForWARDCommand setPreferredIntervals:@[@30.0]];
    MPRemoteCommand *skipForWARDs = [commandCenter skipForWARDCommand];
    [skipForWARDs setEnabled:YES];
    [skipForWARDs addTarget:self action:@SELEctor(skipForWARDEvent:)];

}
-(void)playAudio: (MPRemoteCommandHandlerStatus *)event{
    [self playAction];
    //playAction handles the audio pausing and toggling the play button on the app
}

让我知道,如果你们能想到任何事情,我会很乐意帮助.这让我疯了