Question

我对此代码有疑问：

-(void)playSong
{
    // ...
    NSLog(@"playing %i", currentSONG);
    VKAudio* song = [audios objectAtIndex:currentSONG];
    if (player == nil) { // create player object when first called
        player = [[AVPlayer alloc] initWithURL:[self urlForVKAudio:song]];
        [player play];
        [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil]; // turn on in background
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAVPlayerItemDidPlayToEndTimeNotification) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
    }
    else {
        [player replaceCurrentItemWithPlayerItem:
        [[AVPlayerItem alloc] initWithURL:[self urlForVKAudio:song]]];
        [player play]; // <- this is not working when phone is blocked & screen is off
    }
}

这里的问题是，当我在播放音乐时切换到bg模式时，它正在播放到当前项目的结尾，但是下一个项目没有播放，所以在后台模式方法

[player play];

什么都不做......我做错了什么？（bg音乐模式已开启）

Answer 1

据我所知，您已正确设置AudioSession，但请勿激活它。

这就是我正在使用的：

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];

iOS中的背景音乐问题

1 个答案: