Photos app-like gap between pages in UIScrollView with pagingEnabled

Question

UIScrollView in paging mode assumes the pages are located right next to each other, with no gap. However if you open a photo in the Photos app and swipe through photos, you

Answer 1

This is just a hunch, so apologies if completely wrong, but is it possible that the contentSize is just set to slightly wider than the screen width.

The correct information is then rendered within the view to the screen width and UIScrollView takes care of the rest ?