AVPlayerLayer 进入后台模式时停止播放

Question

I setup AVPlayerLayer with :

        audioPlayer = [[AVPlayer alloc]initWithURL:[NSURL fileURLWithPath:fileName]];
        avPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:audioPlayer];
        [avPlayerLayer setFrame:self.view.bounds];
        [[self.view layer] addSublayer:avPlayerLayer];
        [audioPlayer play];

In the AppDelegete i add :

[[AVAudioSession sharedInstance] setDelegate:self];    
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];

Now in UIViewController Class i add:

-(void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self becomeFirstResponder];
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
    switch (event.subtype) {
        case UIEventSubtypeRemoteControlTogglePlayPause:
            if (audioPlayer.rate == 0.0) {
                [avPlayerLayer.player play];
            } else {
                [avPlayerLayer.player pause];
            }
            NSLog(@"4");
            break;
        case UIEventSubtypeRemoteControlPlay:
            [avPlayerLayer.player play];
            break;
        case UIEventSubtypeRemoteControlPause:
            [avPlayerLayer.player pause];
            NSLog(@"3");
            break;
        case UIEventSubtypeRemoteControlNextTrack:
            [self didPressNextSong:nil];
            NSLog(@"2");
            break;
        case UIEventSubtypeRemoteControlPreviousTrack:
            [self didPressLastSong:nil];
            NSLog(@"1");
            break;
        default:
            break;
    }
}

Now the problem is that when i move to background mode the song stop playing but when i press the play button in the remote control(the menu that popup when i press double click on the home button) the song keep playing from where it stoped.

Any idea why i have this issue?

Answer 1

See this solution:

How do I get my AVPlayer to play while app is in background?

The key is in the UIBackgroundModes in the info plist.