     {
         var index = (viewController as! IntroPageController).pageIndex!
 
-        pageControl.currentPage = index
-
         index += 1
 
         if index >= viewControllers.count {


        return viewControllerAtIndex(index)
    }

    func viewControllerAtIndex(index: Int) -> UIViewController? {

        if index >= viewControllers.count {
            return nil
        }

        return viewControllers[index] as UIViewController
    }
}

    {
        var index = (viewController as! IntroPageController).pageIndex!

        if index <= 0 {
            return nil
        }
