title: How to fix the issue of image cutout in swift 3?
body: <p>I am sharing my image to iMessage using UIActivityViewController.
  Here is my code.</p>
  
  <pre><code>...
  var sharingItems = [AnyObject]()
  sharingItems.append(self.imageView.image)
  let vc = UIActivityViewController(activityItems: sharingItems, applicationActivities: nil)
  self.present(vc, animated: true, completion: nil)
  ...
  </code></pre>
  
  <p>But I got the below result.
  <a href="https://i.stack.imgur.com/Ezhlk.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ezhlk.jpg" alt="enter image description here"></a></p>
  
  <p>How can I fix?</p>