PageViewController current page index in Swift

You can use didFinishAnimating, and set tags to viewcontrollers. try this

func pageViewController(pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool){   if (!completed)  {    return  }  self.pageControl.currentPageIndex = pageViewController.viewControllers!.first!.view.tag //Page Index}

Add this code to your UIPageViewController.

var pages = [UIViewController]()var currentIndex: Int {    guard let vc = viewControllers?.first else { return 0 }    return pages.firstIndex(of: vc) ?? 0}

In Swift 3

Override didFinishAnimating function of UIPageViewControllerDelegate like this:

func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {    if completed {        if let currentViewController = pageViewController.viewControllers![0] as? WalkthroughContentViewController {            pageControl.currentPage = currentViewController.index        }    }}

where WalkthroughContentViewController is the UIViewController presented by UIPageViewController

Remember to keep an index variable inside the WalkthroughContentViewController. Also, in the viewDidLoad method set:

delegate = self