I'm trying to determine when the keyboard's back button is pressed. When there is text in the text field, this is easy. I simply use the delegate method - (BOOL)textField:(UITextField *)aTextField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string. The problem is when the text field is empty and the back button is pressed, this method isn't called.
Does anyone know how to get notified even when the text field is empty?