Ios UIPageViewController，实例化具有脚本ID的ViewController，Objective-C

我正在尝试实现UIPageViewController，我相信我已经到了最后阶段。起初，UIPageViewController只使用一个VC滚动到不同的页面。现在我想让它在不同的ViewController之间滚动。 这是我正在使用的代码：

- (void)viewDidLoad {
    [super viewDidLoad];

    self.vcIdentifiers = @[@"PageContentViewController", @"PageContentViewController1"];


    // Create page view controller
    self.pageViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"PageViewController"];
    self.pageViewController.dataSource = self;

    UIViewController *startingViewController = [self viewControllerAtIndex:0];
    NSArray *viewControllers = @[startingViewController];
    [self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

    self.pageViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 30);

    [self addChildViewController:_pageViewController];
    [self.view addSubview:_pageViewController.view];
    [self.pageViewController didMoveToParentViewController:self];

}

- (PageContentViewController *)viewControllerAtIndex:(NSUInteger)index
{
    if (([self.vcIdentifiers count] == 0) || (index >= self.vcIdentifiers.count)) {
        return nil;
    }


    // Create a new view controller and pass suitable data.
    PageContentViewController *pageContentViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"PageContentViewController"];
    pageContentViewController.titleText = self.pageTitles[index];
    pageContentViewController.pageIndex = index;

    return pageContentViewController;
}

我相信它在viewControllerAtIndex中，我需要做一些更改。我想这样做：

PageContentViewController *pageContentViewController = [self.storyboard instantiateViewControllerWithIdentifier:self.vcIdentifiers[index]];

---

但是它仍然会初始化PageContentViewController。所以我的问题是我不知道如何初始化不同的ViewController。

每个索引应该是不同类型的UIViewController？它们都是用你的故事板制作的吗？没错。是的，它们是在故事板中构建和提供的。我还制作了一个数组，如您在viewDidLoad中看到的Identifiers@Asaf的数组