title: Grouping separator while changing value in UITextfield
body: <p>In order to edit a group-separated number in an <code>UITextField</code> the grouping separator needs to get switched of while editing. Otherwise the returned value (stored as <code>NSNumber</code> value) is (NULL) due to missplaced gouping separators (see the picture and imagine the number is going to be extended by another digit e.g. to "50.0000").</p>
  
  <p>How can I achieve this?</p>
  
  <p><img src="https://i.stack.imgur.com/qkrfV.png" alt="enter image description here"></p>
  
  <p>Right now the value is handled in <code>-(void) textFieldDidEndEditing:(UITextField *)textField</code> method.</p>
  
  <p>(My locale is German so the "." is the grouping separator not the decimal separator!) But I try to get the code working for all regions.</p>