Form fields stepper

gistfile1.m

- (void) viewWillAppear:(BOOL)animated {    
    UIToolbar* toolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    toolbar.barStyle = UIBarStyleBlackTranslucent;
    toolbar.items = [NSArray arrayWithObjects:
                           [[UIBarButtonItem alloc]initWithTitle:@"Previous" style:UIBarButtonItemStyleBordered target:self action:@selector(previous:)],
                           [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                           [[UIBarButtonItem alloc]initWithTitle:@"Next" style:UIBarButtonItemStyleDone target:self action:@selector(next:)],
                           nil];
    [toolbar sizeToFit];
    for (UIView * view in self.view.subviews) {
        if ([view isKindOfClass:[UITextField class]]) {
            UITextField * txt = (UITextField *)view;
            txt.inputAccessoryView = toolbar;
            txt.returnKeyType = UIReturnKeyDone;
        }
    }
  [super viewWillAppear:animated];
}

- (void)next:(id)sender {
    NSInteger nextTag = currentFirstResponder.tag + 1;
    UIResponder* nextResponder = [currentFirstResponder.superview viewWithTag:nextTag];
    if (nil != nextResponder && [nextResponder isKindOfClass:[UITextField class]]) {
        [nextResponder becomeFirstResponder];
    } else {
        [currentFirstResponder resignFirstResponder];
    }
}

- (void)previous:(id)sender {
    NSInteger nextTag = currentFirstResponder.tag - 1;
    UIResponder* previousResponder = [currentFirstResponder.superview viewWithTag:nextTag];
    if (nil != previousResponder && [previousResponder isKindOfClass:[UITextField class]]) {
        [previousResponder becomeFirstResponder];
    } else {
        [currentFirstResponder resignFirstResponder];
    }
}