Apple TV信息视图中的淡入淡出文本

Question

当我在AVPlayerItem上设置externalMetadata并将其加载到AVPlayerViewController的播放器中时，它会在信息中加载我的元数据，但文本会褪色http://drop.lyokotech.com/image/0F0V2W1c431A/Screen%20Shot%202015-11-10%20at%2014.30.03.png

知道为什么会发生这种事吗？这就是我加载它的方式（从根视图控制器）

     func getMetadata() -> [AVMetadataItem] {
        var items = [AVMetadataItem]()
        func createMetaDataItem(key: String, value: String) -> AVMetadataItem {
            let data = AVMutableMetadataItem()
            data.key = key
            data.value = value
            data.keySpace = AVMetadataKeySpaceCommon
            data.locale = NSLocale.currentLocale()
            return data
        }
        let title = createMetaDataItem(AVMetadataCommonKeyTitle, value: "SOME TITLE")
        let description = createMetaDataItem(AVMetadataCommonKeyDescription, value: "SOME DESCRIPTION")

        items.append(title)
        items.append(description)
        return items
    }
    let metadata = getMetadata()
    if let path = NSBundle.mainBundle().pathForResource("IMG_0343", ofType: "MOV") {
        let url = NSURL(fileURLWithPath: path)
        let item = AVPlayerItem(URL: url)
        item.externalMetadata = metadata
        let player = AVPlayer(playerItem: item)
        let av = AVPlayerViewController()
        av.player = player
        av.player?.play()
        presentViewController(av, animated: true, completion: nil)
    }

无论我使用本地文件还是流（HLS）

Answer 1

这是由于模拟器中的问题造成的。它在真正的设备上运行良好。