iOS obj-c move from UIPageViewController - ios

Question

I have successfully created a "tutorial" pages that will show up at the first time user open the app. And i am facing the problem on how to move to another "branch" of view controllers in my storyboard.
So basically I have two main flows in my storyboard:
1. Page View Controllers
2. Main app view controllers
As you can see from screenshot below
So, the question is, how to move to my main app flow after the user clicked on the skip button from my UIPageViewController?
In my tutorial page view controller, i have this code to set the page view controllers
- (void)viewDidLoad {
[super viewDidLoad];
self.arrPageTitles = #[#"A",#"B",#"C"];
self.arrPageImages =#[#"1.jpg",#"2.jpg",#"3.jpg"];
// Create page view controller
self.PageViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"pageViewController"];
self.PageViewController.dataSource = self;
TutorialPageContentViewController *startingViewController = [self viewControllerAtIndex:0];
NSArray *viewControllers = #[startingViewController];
[self.PageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
// Change the size of page view controller
self.PageViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 30);
[self addChildViewController:self.PageViewController];
[self.view addSubview:self.PageViewController.view];
[self.PageViewController didMoveToParentViewController:self];
}
Or is there any better approach to achieve this? Is my design wrong?
I have searching for any clue but can't find any. Thanks!

Answer 1

First of all I'd recommend you to use different storyboards for Tutorial flow and for main app screens. It's very hard to store everything in single storyboard: you will get some mess when project will have at least 20-30 view controllers.
And you can replace root view controller at any time using this code:
let storyboard = UIStoryboard(name: "<storyboard_name>", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "<vc_name>")
UIApplication.shared.keyWindow?.rootViewController = viewController