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正常工作,当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(我会自己提供索引,但无法访问UIPageViewController的UIPageControl)

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

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

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

Answer 1

好吧,结果我误解了一个委托方法

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