Ios UIPageViewController强制重新加载子视图控制器

我在根UIPageViewController中有一个滑块，它需要将滑块值传递给子视图控制器。它适用于除已加载的子视图控制器之外的其他子视图控制器

我在根视图中有滑块，用于更改我调用的滑块值-

- (void)sliderValueChanged:(UISlider *)slider {
    fontValue = slider.value;
    DetailsVC *dataViewController  = [self viewControllerAtIndex:self.newsIndex storyboard:self.storyboard];
    [dataViewController refreshViewForFontSize:slider.value];
}

我有UIPageViewController的常用方法，可以很好地工作。问题是，只有在子ViewController中调用ViewDid Load方法后，它才能工作

- (DetailsVC *)viewControllerAtIndex:(NSUInteger)index storyboard:(UIStoryboard *)storyboard {
    // Return the data view controller for the given index.
    if (([self.pageContent count] == 0) || (index >= [self.pageContent count])) {
        return nil;
    }
    DetailsVC *dataViewController      = [[DetailsVC alloc] init];
    dataViewController.fontValue       = fontValue;
    return dataViewController;
}

---

终于找到了解决办法

    DetailsVC *dataViewController      = [self viewControllerAtIndex:currentIndex-1 storyboard:self.storyboard];
    dataViewController.textColor = textColor;
    NSArray *viewControllers                    = @[dataViewController];
    [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

重新加载子viewcontroller的当前方法是通过

SetViewController:方向：动画：完成：

如果有人需要一个例子项目，我上传到