Refresh UIPageViewController - reorder pages and add new pages

I found a workaround to force UIPageViewController to forget about cached view controllers of neighboring pages that are currently not displayed:

pageViewController.dataSource = nil;pageViewController.dataSource = self;

I do this everytime I change the set of pages. Of course this doesn't affect the currently displayed page.

With this workaround I avoid the caching bug and can still use animated:YES in setViewControllers:direction:animated:completion:.

You need to call setViewControllers:direction:animated:completion:.

Also, in iOS 6, watch out if you're using UIPageViewControllerTransitionStyleScroll style, as there is a major caching bug if animated: is YES (see my discussion here: UIPageViewController navigates to wrong page with Scroll transition style).

Here's my complete implementation of @ortwin-gentz's answer in the didFinish delegate method in Swift 2, which works perfectly for me:

func pageViewController(    pageViewController: UIPageViewController,    didFinishAnimating finished: Bool,    previousViewControllers: [UIViewController],    transitionCompleted completed: Bool) {    if !completed { return }    dispatch_async(dispatch_get_main_queue()) {        pageViewController.dataSource = nil        pageViewController.dataSource = self    }}