另一个UIPageViewController(垂直)内的UIPageViewControl(水平)(2轴)

我希望2个UIPageViewController能够与2个轴(垂直和水平)一起工作:

问题是我的垂直子视图(pvcV)取代了水平子视图(pvcH),因为我在水平子视图之后声明它。我该怎么做才能让两者协同工作?我在这里搜索了很多这种代码,但没有找到。。。

这是我在 根视图控制器 :

self.pvcH = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
self.pvcH.delegate = self;

self.pvcV = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationVertical options:nil];
self.pvcV.delegate = self;

TCDataViewController *startingViewController = [self.modelController viewControllerAtIndex:0 storyboard:self.storyboard];
NSArray *viewControllers = @[startingViewController];
self.pvcH.dataSource = self.modelController;
self.pvcV.dataSource = self.modelController;

[self.pvcV setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:NULL];
[self.pvcH setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:NULL];

[self addChildViewController:self.pvcH];
[self addChildViewController:self.pvcV];
[self.view addSubview:self.pvcH.view];
[self.view addSubview:self.pvcV.view];

如果你能帮助我,非常感谢:)