Swift：将视频从 NSURL 保存到用户相机胶卷

Question

我有一个 NSURL 类型的变量 videoURL。

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

我设置了一个按钮，该按钮应获取此 videoURL 并将视频保存到用户的相机胶卷。

我做得最好的是：

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

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

感谢任何帮助。

编辑：

以下不成功：

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

Answer 1

AssetsLibrary 已弃用

1：导入照片

import Photos

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)
             }
         }

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)
    }
}

Answer 2

已接受的答案不再适用于 Swift 3.0 和 iOS 10。

首先，您需要在应用的 plist 文件中设置以下权限：

隐私 - 照片库使用说明

提供显示给用户的字符串，解释您请求权限的原因。

接下来，导入照片：

import Photos

最后，这是 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)
    }
}

Answer 3

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)
}

引用自::https://www.raywenderlich.com/94404/play-record-merge-videos-ios-swift

Answer 4

在 swift 4.2 及更高版本中尝试将视频保存在照片库中

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)
                }
            }
        }
    }

函数的使用

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

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

Answer 5

自 iOS 9 起已弃用

1：导入 AssetsLibrary

import AssetsLibrary

2：使用此代码将视频从 url 保存到相机库。

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

Answer 6

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
        }
}