title: Swift - UIViews order programmatically
body: <p>I have several UIView layers in one ViewController. 
  <a href="https://i.stack.imgur.com/778Pj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/778Pj.png" alt="Several UIViews layers"></a></p>
  
  <p>How can I determine the order of UIView programmatically?</p>