title: Show "#" instead of "bullets" in UITextField for "Secure Text Entry"
body: <p>I have a requirement to show <strong>"#"</strong> instead of <strong>bullets</strong> for password field.
  But as there is no default option available for it in UITextField.</p>
  
  <p>I have tried to write custom logic in <strong>"shouldChangeCharactersInRange"</strong>
  But i am not able to handle the index when user will remove or add any specific character from in-between.</p>
  
  <p>So here are my questions :-
   1. Do i need to find any library
   2. There is any other default option available for it?
   3. Need to write custom logic for it? If so where i can handle it correctly <strong>"shouldChangeCharactersInRange"</strong> or <strong>"textFieldDidChange"</strong></p>