title: Not able to select multiple files using UIDocumentPickerViewController
body: <p>I'm trying to import/pick multiple files at once from files app using <code>UIDocumentPickerViewController</code>. <br><br> Tried setting <code>allowsMultipleSelection = true</code> but still there is no "<strong>Select</strong>" option while picker is presented.</p>
  
  <p>Code snippet :</p>
  
  <pre><code>UIDocumentPickerViewController *dvc = [[UIDocumentPickerViewController alloc]initWithDocumentTypes:arrContents inMode:UIDocumentPickerModeImport];
  dvc.delegate = self;
  dvc.allowsMultipleSelection = true;
  [self presentViewController:dvc animated:true completion:nil];
  </code></pre>
  
  <p>Screenshot :
  <a href="https://i.stack.imgur.com/NYASY.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NYASY.png" alt="enter image description here"></a></p>