Ios 环球媒体播放器AV3

我有一个自定义媒体播放器，我希望在我的应用程序中普遍使用它；然而，我不希望继续从一页到另一页复制和粘贴代码，因为我需要这个视频播放器在多个领域工作。我将如何在一个文件中单独创建它，并能够在每个需要它的文件中调用它？这是严格针对iOS的

代码如下：

let avPlayer = AVPlayer()
var avPlayerLayer: AVPlayerLayer!

let playerButton = UIButton()

var timeWatcher : AnyObject!

var timeRemainingLabel = UILabel()

let seekSlider = UISlider()
var playerRateBeforeSeek : Float = 0

var loadingIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)


override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = .black

    // An AVPlayerLayer is a CALayer instance to which the AVPlayer can
    // direct its visual output. Without it, the user will see nothing.
    avPlayerLayer = AVPlayerLayer(player: avPlayer)
    view.layer.insertSublayer(avPlayerLayer, at: 0)

    //this is for the button, we will do it through storyboard
    view.addSubview(playerButton)
    playerButton.addTarget(self, action: #selector(playerButtonTapped), for: .touchUpInside)


    let url = NSURL(string: "https://content.jwplatform.com/manifests/vM7nH0Kl.m3u8")
    let playerItem = AVPlayerItem(url: url! as URL)
    avPlayer.replaceCurrentItem(with: playerItem)

    //timer info
    let timeInterval : CMTime = CMTimeMakeWithSeconds(1.0, 10)
    timeWatcher = avPlayer.addPeriodicTimeObserver(forInterval: timeInterval, queue: DispatchQueue.main, using: { (elapsedTime:CMTime) in
       // print("the time has now been:", CMTimeGetSeconds(elapsedTime))
        self.observeTime(elapsedTime: elapsedTime)
        self.timeRemainingLabel.textColor = .white
        self.view.addSubview(self.timeRemainingLabel)

    //buffer indicator
        self.loadingIndicatorView.hidesWhenStopped = true
        self.view.addSubview(self.loadingIndicatorView)
        self.avPlayer.addObserver(self, forKeyPath: "currentItem.playbackLikelyToKeepUp", options: .new, context: &playbackLikelyToKeepUpContext)

    }) as AnyObject!
}


//buffer
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if context == &playbackLikelyToKeepUpContext {
        if avPlayer.currentItem!.isPlaybackLikelyToKeepUp {
            loadingIndicatorView.stopAnimating()
        } else {
            loadingIndicatorView.startAnimating()
        }
    }
}

deinit {
    //timer
    avPlayer.removeTimeObserver(timeWatcher)

    //buffer
    avPlayer.removeObserver(self, forKeyPath: "currentItem.playbackLikelyToKeepUp")
}


private func updateTimeLabel(elapsedTime: Float64, duration: Float64) {
    let timeRemaining: Float64 = CMTimeGetSeconds(avPlayer.currentItem!.duration) - elapsedTime

    timeRemainingLabel.text = String(format: "%02d:%02d", ((lround(timeRemaining) / 60) % 60), lround(timeRemaining) % 60)


}


private func observeTime(elapsedTime: CMTime) {
    let duration = CMTimeGetSeconds(avPlayer.currentItem!.duration)
  //  if isFinite(duration)
   // {
        let elapsedTime = CMTimeGetSeconds(elapsedTime)
        updateTimeLabel(elapsedTime: elapsedTime, duration: duration)
   //}
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    loadingIndicatorView.startAnimating() //animating the buffer
    avPlayer.play() // Start the playback

}

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()

    // Layout subviews manually - replace w/ storyboard
    avPlayerLayer.frame = view.bounds
    playerButton.frame = view.bounds

    //time remaining - replace w/ story board
    let controlsHeight: CGFloat = 30
    let controlsY: CGFloat = view.bounds.size.height - controlsHeight
    timeRemainingLabel.frame = CGRect(x: 5, y: controlsY, width: 60, height: controlsHeight)

    //buffer - replace w/ storyboard
    loadingIndicatorView.center = CGPoint(x: view.bounds.midX, y: view.bounds.midY)
}

func playerButtonTapped(sender: UIButton) {
    let playerIsPlayer = avPlayer.rate > 0
    if playerIsPlayer {
        avPlayer.pause()
    } else {
        avPlayer.play()
    }
}

// Force the view into landscape mode (which is how most video media is consumed.
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return UIInterfaceOrientationMask.landscape
}

override var shouldAutorotate: Bool {
    return true
}

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将播放机移动到一个单独的类中，并在需要播放机时初始化该类。由于视频在自己的类中被分离，因此该类是否跟踪视频当前是否在媒体播放机中播放？或者我也需要为此设置一个追踪器；因为我不想有人同时播放两个视频。当你不需要的时候，你应该去现场直播。如果你想在同一个实例中通过应用程序在全球范围内使用它，你应该让它成为一个我以前从未听说过的单身者；我只是查了一下，它看起来很有希望；您是否有任何关于swift 3 singleton的资源/参考资料可供我查阅？因为单件行李与swift 2和swift 3在swift 3上有区别，所以这只是一条单行线。请看这里：