title: enabling the "return button" in a UITextField keyboard (objective-c/iphone)
body: <p>When I start editing a UITextField, I have the "Clear When Editing Begins" option checked so it starts off with no text. However, the "Return" button is grayed out until you type at least one character.</p>
  
  <p>I've seen other iphone apps where the "Return" button is not grayed out (and if you press it with no text, then it goes back to what the text used to be). How is this done?</p>
  
  <p>Thanks.</p>