Swift：将视频从NSURL保存到用户相机胶卷 [英] Swift: save video from NSURL to user camera roll

问题描述

我有NSURL类型的变量 videoURL 。

I have a variable videoURL of type NSURL.

如果我打电话给 println （videoURL）它会返回如下内容：
http://files.parsetfss.com/d540f71f-video.mp4

If I call println(videoURL) it would return something like this: http://files.parsetfss.com/d540f71f-video.mp4

我有一个按钮设置，应该使用此videoURL并将视频保存到用户的相机胶卷。

I have a button set up that should take this videoURL and save the video to the user's camera roll.

我所做的最好的是：

UISaveVideoAtPathToSavedPhotosAlbum(videoPath: String!, completionTarget: AnyObject!, completionSelector: Selector, contextInfo: UnsafeMutablePointer<Void>)

虽然我甚至不确定这是否有效，但我可以弄清楚如何将 videoFile：NSURL 转换为 videoPath 。

While I'm not even sure if this will work or not, I can't figure out how to convert videoFile:NSURL into a videoPath.

对此有任何帮助。

修改：

以下是不成功的：

UISaveVideoAtPathToSavedPhotosAlbum(videoURL.relativePath, self, nil, nil)

推荐答案

不推荐使用AssetsLibrary

AssetsLibrary is deprecated

1：导入照片

import Photos

2：使用此代码将视频从网址保存到相机库。

2: Use this code to save video from url to camera library.

PHPhotoLibrary.sharedPhotoLibrary().performChanges({
             PHAssetChangeRequest.creationRequestForAssetFromVideoAtFileURL(nsUrlToYourVideo)
         }) { saved, error in
             if saved {
                 let alertController = UIAlertController(title: "Your video was successfully saved", message: nil, preferredStyle: .Alert) 
                 let defaultAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
                 alertController.addAction(defaultAction)
                 self.presentViewController(alertController, animated: true, completion: nil)
             }
         }

Swift 3& Swift 4

Swift 3 & Swift 4

PHPhotoLibrary.shared().performChanges({
    PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: urlToYourVideo)
}) { saved, error in
    if saved {
        let alertController = UIAlertController(title: "Your video was successfully saved", message: nil, preferredStyle: .alert)
        let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
        alertController.addAction(defaultAction)
        self.present(alertController, animated: true, completion: nil)
    }
}

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