UIPageViewController, instantiating ViewControllers with Storyboard ID, Objective-C - ios

Question

I am trying to implement UIPageViewController and I believe that I am in the last stage. At first the UIPageViewController only used one VC to scroll to a "different" page. Now i want it to scroll between different ViewControllers.
This is the code i am using:
- (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;
}
I belive it is in the viewControllerAtIndex i need to make some changes. I thought of doing this:
PageContentViewController *pageContentViewController = [self.storyboard instantiateViewControllerWithIdentifier:self.vcIdentifiers[index]];
But then it still would initialise the PageContentViewController. So my problem is i don't know how to initialise the different ViewControllers.