Question

I am trying to capture when a user presses the del key on a number pad on an iPhone in a Edit Did Change event. I presume I can capture it through the sender event but can not find the object to grab and have looked on the net but can not find anywhere where I can get the key pressed through the sender event.

I am making a phone number text field formatter and would like to allow the user to use the del key to delete the “-“‘s. But now the way it is written of course it stops there. I just need to capture the del key and have it ignore the formatting.

Thoughts?

  - (IBAction)homePhoneEditChanged:(id)sender 
  {
      if(homePhone.text.length == 13)
      {
          homePhone.text = [homePhone.text substringToIndex:12];
          return;
      }

      static BOOL toggle = NO;
      if (toggle) 
      {
           toggle = NO;
          return;
      }
      // Add a condition here to ignore if the del key was pressed
      if( homePhone.text.length == 3 || homePhone.text.length == 7)
      {
          // Add a -
          toggle = YES;
          homePhone.text = [NSString stringWithFormat:@"%@-",homePhone.text];
      }    
  }

Answer 1

Phone number formatting is a fairly complex idea if you’re going to be concerned with localization. Would it be better to restrict the field to a number only field and then follow something like this?