UIPageViewController setViewControllers，UIPageControl没有显示正确的当前编号

Question

我正在使用带水平滚动的UIPageViewController ...只要用户滚动，UIPageControl正常运行，以编程方式跳转到下一页或上一页时会出现问题

[self.pageViewController setViewControllers:@[[self viewControllerWithIndex:index]] direction:UIPageViewControllerNavigationDirectionReverse animated:YES completion:nil];

比UIPageControl的索引不对（我自己提供索引，但无法访问UIPageViewController＆＃U; UIPageControl）

- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController {
    return IntroScreensCount;
}

- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController {
    return 0;
}

如何以编程方式更改UIPageViewController页面时，如何正确获取UIPageControl的当前点索引？

Answer 1

好的，事实证明我误解了一个委托方法

- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController {
    return [(IntroPageViewController *)[pageViewController.viewControllers firstObject] index];
}