Child View Controller shifts down

Question

I have a TutorialsViewController that has a PageViewController added programmatically as:

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additi         


        

Answer 1

I seem to have found the fix for it, it was related to the auto layout constraints i had set up. My child view controller contains an image view that completely fills it. So i give following constraints to the image view:

1. Center Horizontally In Container
2. Center Vertically In Container
3. Equal Widths (to the container view)
4. Equal Heights (to the container view)

This stops the view shifting/flickering problem.

Answer 2

I've solved this problem with the help of this answer: iOS 8 UIPageViewController Applying Constraints After Transitions by replacing in PageViewController's child all constraints on top layout guide to view.