将视频保存到照片库Swift

Question

我正在尝试弄清楚如何在我的照片库中保存视频。首先，我尝试使用UIImagePickerController来选择视频，并选择后再使用UISaveVideoAtPathToSavedPhotosAlbum将其保存在库中。没什么意义，但我尝试了解保存视频的工作方式。

以下代码不起作用，因为它无法保存视频：

@IBAction func ChooseVideo(_ sender: Any) {
    let imagePickerController = UIImagePickerController()
    imagePickerController.delegate = self

    imagePickerController.mediaTypes = ["public.movie"]
    self.present(imagePickerController, animated: true, completion: nil)
    }

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

    let videoURL = info[UIImagePickerController.InfoKey.mediaURL] as? URL
    print(UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(videoURL!.path))

    dismiss(animated: true, completion: {
        UISaveVideoAtPathToSavedPhotosAlbum(videoURL!.path, self,  #selector(self.video(_:didFinishSavingWithError:contextInfo:)), nil)
    })
}

我希望您能对我有所帮助，因为我在保存视频方面找不到很多。

最好的问候，MB

解决方案：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
{
    // *** store the video URL returned by UIImagePickerController *** //
    let videoURL = info[UIImagePickerController.InfoKey.mediaURL] as! URL

    // *** load video data from URL *** //
    let videoData = NSData(contentsOf: videoURL)

    // *** Get documents directory path *** //
    let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)[0]

    // *** Append video file name *** //

    print(paths)
    let dataPath = paths.appending("/videoFileName.mp4")

    // *** Write video file data to path *** //
    videoData?.write(toFile: dataPath, atomically: false)

    PHPhotoLibrary.shared().performChanges({
        PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: URL(fileURLWithPath: dataPath))
    }) { saved, error in
        if saved {
            let fetchOptions = PHFetchOptions()
            fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]

            let fetchResult = PHAsset.fetchAssets(with: .video, options: fetchOptions).firstObject
            // fetchResult is your latest video PHAsset
            // To fetch latest image  replace .video with .image
        }
    }
}

Answer 1

• 使用以下功能将视频保存到文档目录

  func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) 
  {
      // *** store the video URL returned by UIImagePickerController *** //
      let videoURL = info[UIImagePickerControllerMediaURL] as! NSURL
  
      // *** load video data from URL *** //
      let videoData = NSData(contentsOfURL: videoURL)
  
      // *** Get documents directory path *** //
      let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0]
  
      // *** Append video file name *** //
      let dataPath = documentsDirectory.stringByAppendingPathComponent("/videoFileName.mp4")
  
      // *** Write video file data to path *** //
      videoData?.writeToFile(dataPath, atomically: false)
  }
  

• 现在将此视频保存在照片胶中

  PHPhotoLibrary.shared().performChanges({
      PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: Your document directory file)
  }) { saved, error in
      if saved {
          let fetchOptions = PHFetchOptions()
          fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
  
          let fetchResult = PHAsset.fetchAssets(with: .video, options: fetchOptions).firstObject
          // fetchResult is your latest video PHAsset
          // To fetch latest image  replace .video with .image
      }
  }
  

如果不需要，请在其后将其从文档目录中删除，希望它对您有用...：）