Assertion failure in UIPageViewController

Question

I have an Assertion Failure in UIPageViewController.

Assertion failure in -[UIPageViewController _flushViewController:animated:], /BuildRoot/Library/Caches/c         


        

Answer 1

This happens when your UIPageViewControllerTransitionStyle is set to scroll instead of pageCurl.

Are you dynamically creating View Controllers and setting them on UIPageViewController? In that case, you must ensure that the second call to setViewControllers is called after the first one completes animation because of a bug in UIKit. A delayed dispatch is a quick and dirty fix, though it is not a good practice

More details here.

https://forums.developer.apple.com/thread/6554