带有AVPlayer的SKVideoNode正在播放但在iOS 9.0上不可见

Question

我遇到Xcode 7.0（7A220）和iOS 9.0的问题。我使用AVPlayer和SKVideoNode添加了一个视频（.mp4或mov，两者都不起作用）。在iOS 8.4的模拟器上它工作正常，但在iOS 9.0（也是模拟器）上，视频没有显示。我可以听到音频。

我GameScene（班级SKScene）中的代码：

-(void)didMoveToView:(SKView *)view {

    NSURL *fileURL = [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:@"VideoName" ofType:@"mp4"]];
    _player = [AVPlayer playerWithURL: fileURL];

    _videoNode = [[SKVideoNode alloc] initWithAVPlayer:_player];
    _videoNode.size = CGSizeMake(200, 100);
    _videoNode.position = CGPointMake(200, 200);
    _videoNode.zPosition = 1000;

    [self addChild:_videoNode];

    _player.volume = 0.5;
    [_videoNode play];
}

在UIViewController我有这个：

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Configure the view.
    SKView * skView = (SKView *)self.view;
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;

    /* Sprite Kit applies additional optimizations to improve rendering performance */
    // I have set this to NO, but it doesn't help
    skView.ignoresSiblingOrder = NO;

    // Create and configure the scene.
    CGRect rect = [[UIScreen mainScreen] bounds];
    GameScene *videoScene = [[GameScene alloc] initWithSize:rect.size];
    videoScene.scaleMode = SKSceneScaleModeAspectFill;

    GameScene *scene = [GameScene unarchiveFromFile:@"GameScene"];
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene.
    [skView presentScene:videoScene];
}

因此应用程序没有崩溃，视频正在播放（我可以听到），但视频在iOS 9上是不可见的。有人有想法解决它吗？