title: touch events on UITextField rightView
body: <p>I have several text fields which compromise a registration form . When the user hit submit and made invalid inputs the wrong fields are marked with an icon as rightView. </p>
  
  <p>The rightView i use is a custom UIImageView subclass which has it's:</p>
  
  <pre><code>- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  </code></pre>
  
  <p>overwritten to display a alert to tell the user what exactly is wrong with this field.</p>
  
  <p>The problem is that the touchesBegan method is never called. Why is the view not receiving touch events when I touch it?</p>