title: How to resize UITextView on iOS when a keyboard appears?
body: <p>There's <code>UITextView</code> inserted into tab in <code>UITabBarController</code> (on the iPhone).</p>
  
  <ol>
  <li>Fill <code>UITextView</code> with a lot of lines.</li>
  <li>Show a keyboard to edit text.</li>
  </ol>
  
  <p>What's happen? The keyboard hide a half of <code>UITextView</code> with cursor. Can't edit the text as the result.</p>
  
  <p>How to resolve the issue for all Apple mobile devices (with different screen resolution)? Thanks a lot for help!</p>