Filtering characters entered into a UITextField

Question

I have a UITextField in my application. I\'d like to restrict the set of characters that can be can be entered into the field to a set that I have defined. I could filter th

Answer 1

Look at textField:shouldChangeCharactersInRange

This method is called by the UITextFieldDelegate whenever new characters are typed or existing characters are deleted from the text field. You could return NO to not allow the change.