title: Clearing all text fields in xcode
body: <p>Is there a way of clearing all test fields when selecting a text field to enter text with the keyboard.</p>
  
  <p>For instance if you had a tip calculator that you have already run once, and all the fields are now populated.</p>
  
  <p>Now when you want to run another calculation, you click on the text field an all the other fields are automatically cleared also.</p>
  
  <p>Hope this makes sense.
  Steve</p>