LargeTitles UIScrollView does not support multiple observers implementing _scrollViewWillEndDraggingWithVelocity:targetContentOffset

Question

I have implemented large titles in my app with the following code:

if #available(iOS 11.0, *) {
            navigationController?.navigationBar.prefersLargeTitle         


        

Answer 1

I found the solution. You have to set the first navigation controller to not use large titles.

The point is that now UIScrollView has only one observer (navigationController) implementing _scrollViewWillEndDraggingWithVelocity.

if (@available(iOS 11.0, *)) {

    self.navigationController.navigationBar.prefersLargeTitles = FALSE;
    self.navigationController.navigationItem.largeTitleDisplayMode = UINavigationItemLargeTitleDisplayModeNever;

}