Question

我正在尝试让我的播客应用在锁定屏幕中显示内容，以及尊重播放/暂停控件。这是我的代码：

- (void)playEpisodeAtIndex:(NSInteger)index {

    _currentIndex = index;
    TalkPodEpisode *episode = self.playlist[index];
    self.player = [[AVPlayer alloc] initWithURL:episode.url];
    [self.player play];
    _playing = YES;

    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

    NSDictionary *lockScreenInfo = @{MPMediaItemPropertyTitle:self.currentEpisode.title,
                                 MPMediaItemPropertyArtist: @"The Talk Pod",
                                 MPNowPlayingInfoPropertyPlaybackRate:[NSNumber numberWithDouble:self.player.rate],
                                          MPNowPlayingInfoPropertyElapsedPlaybackTime:[NSNumber numberWithDouble:[self currentPlaybackTime]]};
    [MPNowPlayingInfoCenter defaultCenter].nowPlayingInfo = lockScreenInfo;


}

奇怪的是，这就是发生的事情：

响应和处理事件工作得很好
艺术家和标题出现在锁屏上
进度滑块显示 - ： - ，并且不显示播放进度
这一集的持续时间也没有出现。

以下是获取当前已用时间的代码：

- (NSTimeInterval)currentPlaybackTime {

    CMTime time = self.player.currentTime;
    if (CMTIME_IS_VALID(time)) {

        return time.value/time.timescale;

    }

    return 0;

}

以下是切换播放和播放的代码暂停：

- (void)playPause {

    if (self.player) {

        if (_playing) {

            [self.player pause];
            _playing = NO;

        } else {

            [self.player play];
            _playing = YES;

        }

        NSMutableDictionary *lockScreenInfo = [[MPNowPlayingInfoCenter defaultCenter].nowPlayingInfo mutableCopy];
        lockScreenInfo[MPNowPlayingInfoPropertyPlaybackRate] = [NSNumber numberWithDouble:self.player.rate];
        lockScreenInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = [NSNumber numberWithDouble:[self currentPlaybackTime]];
        [MPNowPlayingInfoCenter defaultCenter].nowPlayingInfo = lockScreenInfo;

    }

}

任何人都知道如何解决这个问题？令我困惑的是，一些的东西出现在屏幕上，但当前的播放信息却没有。同样，接收和处理事件也很合适。

Answer 1

可能需要在nowPlayingInfo字典中设置播放持续时间键。看看我的帖子中的另一个问题，它在我的应用程序中运行正常。 Stack : Show seek track duration on control center

锁屏不尊重nowPlayingInfo字典

1 个答案: