AMScrollingNavbar | Scrollable UINavigationBar that follows the scrolling | iOS library

There is a lot of code in the question, so I may not be on the right track, but I do want to help and I have a theory. Right now you're checking to see if you're on the last item in the collectionView like this:

if indexPath.section >= allEvents.count - 1

If you print indexPath.section, I bet it will always be the same. Probably always 0 because your collectionView only has one section. Instead try:

if indexPath.item >= allEvents.count - 1

That should return the number of the item instead of the section the item is in.

Like this:

From debugging my own Segmentation Fault 11 issues I see a common suggestion that sometimes works is removing/reinstalling your dependency - that has never helped me, but worth trying.

Having a quick look at RMActionController project you might want to investigate creating your action at step #1 with the action handler closure (even just an empty closure) and see if that helps e.g.