uigesturerecognizer - tvOS：检测暂停按钮按下

Question

我试图检测用户何时按下遥控器上的播放/暂停按钮。我创建了一个点击手势识别器并将其附加到 AVPlayerViewController 子类的视图中。

    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(togglePlayPause:)];
    tapGestureRecognizer.allowedPressTypes = @[@(UIPressTypePlayPause)];
    [self.view addGestureRecognizer:tapGestureRecognizer];


- (void)togglePlayPause:(UITapGestureRecognizer *)tapGestureRecognizer
{
    NSLog(@"Toggle play/pause");
    if ([self playing])
    {
        NSLog(@"    Pause");
        [self.player pause];
    }
    else
    {
        NSLog(@"    Play");
        [self.player play];
    }
}

当按下“播放”按钮时，手势可以正常触发，但在按下“暂停”按钮时不会。任何想法为什么？