title: Change UIFont in secure UITextField strange behaviour in iOS7
body: <p>I create a simple project: <a href="https://github.com/edzio27/textFieldExample.git" rel="noreferrer">https://github.com/edzio27/textFieldExample.git</a></p>
  
  <p>where I add two <code>UITextField</code>s, one with login and second one with secure password. I've noticed there strange behaviour:</p>
  
  <ol>
  <li>click on login and add some text,</li>
  <li>click on password and add some text,</li>
  <li>click again to login <code>UITextField</code></li>
  </ol>
  
  <p><img src="https://i.stack.imgur.com/1MG2v.gif" alt="enter image description here"></p>
  
  <p>Notice that there is a strange behaviour in password font size. It is only appears in iOS7.</p>
  
  <p>What can be the problem? </p>
  
  <p>Thanks.</p>