Swift: save video from NSURL to user camera roll

问题

I have a variable videoURL of type NSURL.

If I call println(videoURL) it would return something like this: 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.

The best I have done is this:

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:NSURL into a videoPath.

Any help is appreciated on this.

Edit:

The following is unsuccessful:

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

回答1:

AssetsLibrary is deprecated

1: import Photos

import Photos

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

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2:

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

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

Privacy - Photo Library Usage Description

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

Next, import photos:

import Photos

Finally, here is the updated code for Swift 3.0:

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3:

To save video from NSURL to user camera roll

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

回答4:

deprecated as of iOS 9

1: import AssetsLibrary

import AssetsLibrary

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

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

回答5:

Just use it and paste your video's url:

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
        }
}

来源：https://stackoverflow.com/questions/29482738/swift-save-video-from-nsurl-to-user-camera-roll