iPhone: How do I create a simple Done button?
<p>Newbie alert!  I have a simple calculator with 4 text input fields.  When I tap into a field the number pad appears and I enter numbers.  No problems so far.  Now, when testing this using the simulator I press return on the keyboard and using TextFieldShouldReturn my fields perform their calculations perfectly and the number keypad disappears nicely.  The problem is, the number keypad does not have a 'Done' key so if I place a button let's say on the toolbar how do I code it to perform the action of the Return key?</p>
