swift 中带有下载按钮的视频播放器

Question

我有一个视频播放器，我想添加一个下载按钮。我如何将此按钮添加到我的视频播放器或创建一个按钮来下载该视频。坦克。我的代码是：

let videoURL = URL(string: "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")
let player = AVPlayer(url: videoURL!)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
self.present(playerViewController, animated: true) {
playerViewController.player!.play()

Answer 1

请检查下面的代码，下载是在后台线程中进行的，因此不会影响 UI。

class func downloadVideo(videoImageUrl:String)
{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {

        let url=NSURL(string: videoImageUrl)
        let urlData=NSData(contentsOfURL: url!)

        if((urlData) != nil)
        {
            let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]

            let fileName = videoImageUrl.lastPathComponent //.stringByDeletingPathExtension

            let filePath="\(documentsPath)/\(fileName)"

            //saving is done on main thread

            dispatch_async(dispatch_get_main_queue(), { () -> Void in

                 urlData?.writeToFile(filePath, atomically: true)
            })

        }
    })

}

用于在按钮目标中调用上述函数。

Self.downloadVideo("https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")

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