title: Get UIAlertController action sheet width
body: <p>I have been banging my head a against the wall for a while now:</p>
  
  <p>How can I get the width of a UIAlertController action sheet's view?</p>
  
  <p>Saying <code>alert.view.frame.width</code> gives <code>view.frame.width</code>.</p>
  
  <p>Also, I saw <a href="https://stackoverflow.com/q/37409826">this</a> question, but it simply does not work: it just changes the frame of the alert, and I don't see how I can get the width from it.</p>
  
  <p>Thanks in advance.</p>