UIPageViewController setViewController，UIPageControl不显示正确的当前数字

本文介绍了UIPageViewController setViewController，UIPageControl不显示正确的当前数字的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我使用UIPageViewController水平滚动...只要用户滚动，UIPageControl工作正常，以编程方式跳到下一页或上一页时出现问题

I'am using a UIPageViewController with horizontal scrolling... as long as the user scrolls, the UIPageControl works correctly, problem occurs when jumping programmatically to next or previous page

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

由于UIPageControl的索引不正确（我会自己提供索引，访问UIPageViewController的UIPageControl）

Than the index of the UIPageControl isn't right (i would provide the index by myself, but cannot access the UIPageViewController's UIPageControl)

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

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

如何获取UIPageControl的当前点索引以编程方式更改UIPageViewController页面？

推荐答案

ok，结果是我误解了一个委托方法

ok, turned out that i misunderstood one delegate method

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

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