title: background image TextField doesn´t appear
body: <p>I have XCode 4.2</p>
  
  <p>In interface builder i´m choosing a background image for my TextField but it just doesn´t appear. I did the same for a custom button and worked great. Don´t know what i´missing.</p>
  
  <p>Dumb question, but i can´t figured it out.</p>