问如何在ios应用中播放RTMP视频流？

EN

func setPlayer()
{
    // RTMP URL rtmp://XY.Y.ZX.Z/hls/chid be transcripted like this http://XY.Y.ZX.Z/hls/chid.m3u8 it will play normally.

    let videoURL = URL(string: "http://XY.Y.ZX.Z/hls/chid.m3u8")

    let playerItem = AVPlayerItem(url: videoURL!)
    let adID = AVMetadataItem.identifier(forKey: "X-TITLE", keySpace: .hlsDateRange)
    let metadataCollector = AVPlayerItemMetadataCollector(identifiers: [adID!.rawValue], classifyingLabels: nil)
    //metadataCollector.setDelegate(self, queue: DispatchQueue.main)
    playerItem.add(metadataCollector)


    let player = AVPlayer(playerItem: playerItem)
    let playerLayer = AVPlayerLayer(player: player)
    playerLayer.frame = self.view.bounds
    self.view.layer.addSublayer(playerLayer)
    self.player = player
    player.play()
}