title: How to know if the iOS camera is not focused and not adjusting
body: <p>We're making an app where we need to show one of the following states:</p>
  
  <ul>
  <li>focused,</li>
  <li>focusing (adjusting),</li>
  <li>not focused.</li>
  </ul>
  
  <p>It seems that when you move the camera around, the camera will not try to adjust until you stop the movement. So how to identify this state? </p>