ios - MPNowPlayingInfoCenter 在 iOS 8 中不显示媒体信息

我尝试使用此代码在锁屏和控制中心显示媒体信息，但它没有显示任何内容:

Class playingInfoCenter = NSClassFromString(@"MPNowPlayingInfoCenter");

if (playingInfoCenter) {


    NSMutableDictionary *songInfo = [[NSMutableDictionary alloc] init];


    MPMediaItemArtwork *albumArt = [[MPMediaItemArtwork alloc] initWithImage: [UIImage imagedNamed"AlbumArt"]];

    [songInfo setObject"Audio Title" forKey:MPMediaItemPropertyTitle];
    [songInfo setObject"Audio Author" forKey:MPMediaItemPropertyArtist];
    [songInfo setObject"Audio Album" forKey:MPMediaItemPropertyAlbumTitle];
    [songInfo setObject:albumArt forKey:MPMediaItemPropertyArtwork];
    [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:songInfo];

}

我也设置了 FirstResponding 但仍然没有看到任何东西。

- (void) viewDidAppear: (BOOL) animated
{
    [super viewDidAppear:animated];
    [self becomeFirstResponder];
    NSLog(@"is first resp: %i",[self isFirstResponder]);

    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    // Initialize the AVAudioSession here.

    [[UIApplication sharedApplication] endReceivingRemoteControlEvents];

}

- (BOOL) canBecomeFirstResponder
{
    return YES;
}

我该如何解决这个问题？谢谢

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Best Answer-推荐答案

您是否开启了如下所示的“音频、AirPlay 和画中画”？

关于ios - MPNowPlayingInfoCenter 在 iOS 8 中不显示媒体信息，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35055545/