UIPageViewControllerDelegate methods and UIPageControl

PresentationViewController.m

    self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 40, self.view.frame.size.width, 40)];
    [self.view addSubview:self.pageControl];
    
    self.pageControl.numberOfPages = self.dataSource.pageCount;
}

#pragma mark - UIPageViewController

- (void)pageViewController:(UIPageViewController *)pageViewController willTransitionToViewControllers:(NSArray *)pendingViewControllers {

    ContentViewController *viewController = pendingViewControllers[0];
    self.pageControl.currentPage = viewController.index;
}

- (void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray *)previousViewControllers transitionCompleted:(BOOL)completed {

    ContentViewController *viewController = previousViewControllers[0];
    if (!completed) {
        self.pageControl.currentPage = viewController.index;
    }
}