我无法从Gallery Swift中选择视频

我的代码在这里

@IBAction func openVideo(_ sender: Any) {
        //selectVideo(delegate: self, sourceType: .savedPhotosAlbum)
        let mediaUI = UIImagePickerController()
        mediaUI.sourceType = .savedPhotosAlbum
        mediaUI.mediaTypes = [kUTTypeMovie as String]
        mediaUI.allowsEditing = true
        mediaUI.delegate = self
        self.present(mediaUI, animated: true, completion: nil)
        
    }

在这一部分，我选择视频。

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    func processVideo(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]){
        
        let url = info[UIImagePickerController.InfoKey.mediaURL] as! URL
        print("hey") 
        self.dismiss(animated: true) {
            let player = AVPlayer(url: url)
            let vcPlayer = AVPlayerViewController()
            vcPlayer.player = player
            self.present(vcPlayer, animated: true, completion: nil)
            
         
        }
        
    }
}

我究竟做错了什么？

我在processVideo函数中无法得到任何打印。从图库中选择视频后出现此错误。

"Error returned from daemon: Error Domain=com.apple.accounts Code=7 "(null)""