title: Creating a UITextField that works like the iOS Mail's "To" field
body: <p>In iOS's Mail app, when you enter in the email of someone who is in your contact list it formats the text in an interactive bubble. I can't seem to find any obvious way to do this, and it's exactly what my app needs to do, and I'm not even sure where to start.</p>
  
  <p>Any pointers to where to look would be appreciated!</p>