Iphone: UIButton text setting - wrong and correct way

Wrong way:

       self.notificationButton.titleLabel.text=[NSString stringWithFormat:@"%i",notificationCount];

Correct way:

        [self.notificationButton setTitle:[NSString stringWithFormat:@"%i",notificationCount] forState:UIControlStateNormal];

By setting in a wrong way, title changed to default (set using storyboard) when user will click