title: How do you obscure text in a password field in an iPhone Application?
body: <p>I have a password field in my application (UITextField). When user enters text in the field, I want it to display <code>*</code> instead of the text they entered.</p>
  
  <p>I have tried using the <code>UIControlEventEditingDidEnd</code> of <code>UITextField</code> but it only shows one <code>*</code> at the end when editing but I want it to display the <code>*</code>s as soon as any text is entered, like in any online email password field. How can I get the desired behavior?</p>