刷新UIPageViewController - 重新排序页面并添加新页面 [英] Refresh UIPageViewController - reorder pages and add new pages

问题描述

我有一个 UIPageViewController 它提供页面数据使用 UIPageControllerDelegate 和 UIPageControllerDataSource 。

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

这一切都很好，但我想能够添加项目到页面数据和重新排序页面数据。

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

如果用户已经到达最后一个页面，然后添加一个项目，他们无法进入下一页，因为 viewControllerAfterViewController：已被调用。如果他们向后滚动一个，然后向前转两个，他们可以得到新的页面，所以数据设置正确。我如何告诉 UIPageViewController 刷新它的下一个存储？

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?

同样，我想重新排序是支持页面视图的集合。但是，如果我这样做，我会得到同样的问题 - 页面视图将认为下一页仍然是上一次加载当前页面。

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.

我猜猜我在寻找类似 reloadData：在 UITableView 。

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

推荐答案

您需要调用 setViewControllers：direction：animated：completion：。

此外，在iOS 6中，请注意，如果你使用UIPageViewControllerTransitionStyleScroll样式，因为如果 animated：是一个主要的缓存错误此处讨论： UIPageViewController使用Scroll导航到错误的页面转换样式）。

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).

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