ssloan ssloan - 4 months ago 17
iOS Question

Refresh UIPageViewController - reorder pages and add new pages

I have a

UIPageViewController
which I am providing page data for using an implementation of
UIPageControllerDelegate
and
UIPageControllerDataSource
.

It's all working fine, but I want to be able to add items to the page data and reorder the page data.

If a user has already got to the last of the pages, and then I add an item, they can't get to the next page because
viewControllerAfterViewController:
has already been called. If they scroll back one and then forward two they can get to the new page fine, so the data is setup correctly. How can I tell the
UIPageViewController
to refresh its store of what comes next?

Similarly I would like to reorder the collection that is backing the page view. But if I do this I'll get the same problem - the page view will think the next page is still what it was last time the current page was loaded.

I guess I'm looking for something similar to
reloadData:
on
UITableView
.

Answer

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).