ViewController.swift

// MARK: - View Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        createPageViewController()
        setupPageControl()
    }
    
    private func createPageViewController() {
        
        let pageController = self.storyboard!.instantiateViewControllerWithIdentifier("PageController") as! UIPageViewController
        pageController.dataSource = self
        
        if contentImages.count > 0 {
            let firstController = getItemController(0)!
            let startingViewControllers = [firstController]
            pageController.setViewControllers(startingViewControllers, direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)
        }
        
        pageViewController = pageController
        addChildViewController(pageViewController!)
        self.view.addSubview(pageViewController!.view)
        pageViewController!.didMoveToParentViewController(self)
    }

    private func setupPageControl() {
        let appearance = UIPageControl.appearance()
        appearance.pageIndicatorTintColor = UIColor.grayColor()
        appearance.currentPageIndicatorTintColor = UIColor.whiteColor()
        appearance.backgroundColor = UIColor.darkGrayColor()
    }