title: Formatting the number entered in textfield in iPhone
body: <p>I have a text field where the user enters a number, which is in the range of thousands.</p>
  
  <p>I want the text field to be formatted as the user enters the number, example :
  200000 should become 200,000.</p>
  
  <p>how do i go about doing this??</p>
  
  <p>Many Thanks,</p>
  
  <p>S</p>