title: Use UIBarButtonItem icon in UIButton
body: <p><code>UIBarButtonItem</code> has multiple icons available. Is it possible to use the icon which appears after setting its identifier to 'trash':</p>
  
  <p><img src="https://i.stack.imgur.com/kcSXQ.png" alt="trash icon"></p>
  
  <p>with an <code>UIButton</code>? There is no straighforward method to do that like setting the <strong>identifier</strong> or <strong>style</strong>. </p>