ios Swift：将视频从 NSURL 保存到用户相机胶卷

Swift: save video from NSURL to user camera roll

提问by George Poulos

I have a variable videoURLof type NSURL.

我有一个videoURLNSURL 类型的变量。

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

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

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

我有一个按钮设置，应该使用这个 videoURL 并将视频保存到用户的相机胶卷。

The best I have done is this:

我做过的最好的事情是这样的：

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

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

虽然我什至不确定这是否可行，但我不知道如何转换videoFile:NSURL为videoPath.

Any help is appreciated on this.

对此的任何帮助表示赞赏。

Edit:

编辑：

The following is unsuccessful:

以下是不成功的：

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

回答by Boris

AssetsLibrary is deprecated

AssetsLibrary 已弃用

1: import Photos

1：导入照片

import Photos

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

2：使用此代码将视频从 url 保存到相机库。

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

斯威夫特 3 和斯威夫特 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)
    }
}

回答by CodeBender

The accepted answer no longer works with Swift 3.0 & iOS 10.

接受的答案不再适用于 Swift 3.0 和 iOS 10。

First, you need to set the following permission in your app's plist file:

首先，您需要在应用的 plist 文件中设置以下权限：

Privacy - Photo Library Usage Description

隐私 - 照片库使用说明

Provide a string that is presented to the user explaining why you are requesting the permission.

提供一个显示给用户的字符串，解释您请求权限的原因。

Next, import photos:

接下来，导入照片：

import Photos

Finally, here is the updated code for Swift 3.0:

最后，这里是Swift 3.0的更新代码：

PHPhotoLibrary.shared().performChanges({
    PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: fileURL)
}) { 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)
    }
}

回答by Disha

To save video from NSURL to user camera roll

将视频从 NSURL 保存到用户相机胶卷

func video(videoPath: NSString, didFinishSavingWithError error: NSError?, contextInfo info: AnyObject) 
 {
    if let _ = error {
       print("Error,Video failed to save")
    }else{
       print("Successfully,Video was saved")
    }
}







func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

    if let conversationField = self.conversation {

      if (mediaType?.isEqual((kUTTypeMovie as NSString) as String))!
        {
            let theVideoURL: URL? = (info[UIImagePickerControllerMediaURL] as? URL)

            if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum((theVideoURL?.path)!))
            {
                UISaveVideoAtPathToSavedPhotosAlbum((theVideoURL?.path)!, self, #selector(ConversationDetailsViewController.video(videoPath:didFinishSavingWithError:contextInfo:)), nil)
            }   
   }
   self.dismiss(animated: true, completion: nil)
}

Reference from:: https://www.raywenderlich.com/94404/play-record-merge-videos-ios-swift

参考自：https: //www.raywenderlich.com/94404/play-record-merge-videos-ios-swift

回答by Saqib Omer

deprecated as of iOS 9

自 iOS 9 起弃用

1: import AssetsLibrary

1：导入AssetsLibrary

import AssetsLibrary

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

2：使用此代码将视频从 url 保存到相机库。

ALAssetsLibrary().writeVideoAtPathToSavedPhotosAlbum(outputFileURL, completionBlock: nil)

回答by Hacker Mane

Just use it and paste your video's url:

只需使用它并粘贴您的视频网址：

PHPhotoLibrary.sharedPhotoLibrary().performChanges({ () -> Void in

    let createAssetRequest: PHAssetChangeRequest = PHAssetChangeRequest.creationRequestForAssetFromVideoAtFileURL(NSURL(string: /* your url */)!)!
    createAssetRequest.placeholderForCreatedAsset

    }) { (success, error) -> Void in
        if success {

            //popup alert success
        }
        else {
           //popup alert unsuccess
        }
}

回答by Mithilesh Kuamr

Try this instead for saving video in photo library in swift 4.2 and above

试试这个，以在 swift 4.2 及更高版本的照片库中保存视频

func requestAuthorization(completion: @escaping ()->Void) {
        if PHPhotoLibrary.authorizationStatus() == .notDetermined {
            PHPhotoLibrary.requestAuthorization { (status) in
                DispatchQueue.main.async {
                    completion()
                }
            }
        } else if PHPhotoLibrary.authorizationStatus() == .authorized{
            completion()
        }
    }



func saveVideoToAlbum(_ outputURL: URL, _ completion: ((Error?) -> Void)?) {
        requestAuthorization {
            PHPhotoLibrary.shared().performChanges({
                let request = PHAssetCreationRequest.forAsset()
                request.addResource(with: .video, fileURL: outputURL, options: nil)
            }) { (result, error) in
                DispatchQueue.main.async {
                    if let error = error {
                        print(error.localizedDescription)
                    } else {
                        print("Saved successfully")
                    }
                    completion?(error)
                }
            }
        }
    }

Use of function

函数的使用

self.saveVideoToAlbum(/* pass your final url to save */) { (error) in
                        //Do what you want 
                    }

Don't forgot to import Photos and add Privacy - Photo Library Usage Description to your info.plist

不要忘记导入照片并将隐私 - 照片库使用说明添加到您的 info.plist