title: Changing UITextField borderstyle in didEndEditing
body: <p>I want to highlight a uitextfield when a user is editing it, so I set my textfield's borderstyle default to UITextBorderStyleNone and use the uitextfields delegates as following:</p>
  
  <pre><code>- (void)textFieldDidBeginEditing:(UITextField *)textField
  {
      [textField setBorderStyle:UITextBorderStyleBezel];
  }
  
  - (void)textFieldDidEndEditing:(UITextField *)textField
  {
      [textField setBorderStyle:UITextBorderStyleNone];
  }
  </code></pre>
  
  <p>The Bezel style gets set and rendered, but when the endediting is called, the none style is not applied.
  I tried changing the none to another (say rounded rect), but that one does render properly.</p>
  
  <p>Does anybody know how I can get this to work?</p>