Custom iPad keyboard that looks like the system keyboards

Question

I'm looking for a non-hackish solution for this, so basically -inputView. The part that I'm not sure about is how to make it look like the regular keyboards, from the background to the keys. I realize that I could photoshop an apple keyboard, but this seems like it is a little hackish, especially if apple (probably not but still possible) decides to change the look of their keyboards. I know Numbers has done an excellent job of making extra keyboards that look like the standard system ones, and I would like to do it like those (although obviously they have access to the same resources that made the system keyboards, including possible private frameworks, etc.)

Answer 1

I used the following:

tenDigitKeyboard.m

-(IBAction)pressedKey:(UIButton *)sender
{
    [delegate pressedKey:sender.tag];
}

where delegate is defined as `id delegate;

then in the delegate i do...

-(void)pressedKey:(NSInteger)key
{
    NSString * bufferString = model.string;
    if (key == -1) {//delete
        model.string = [bufferString substringWithRange:NSMakeRange(0, [bufferString length]-1)];
    }else{
     //will need to change the following to lookup key value based on a lookup of the button.tag
        model.string = [bufferString stringByAppendingFormat:@"%i",key];
    }
    [self update];//updates the view
}

I got the keyboard button artwork from: http://www.teehanlax.com/blog/iphone-gui-psd-v4/