UIScrollViewDelegate has got two delegate methods
scrollViewDidEndScrollingAnimation: but neither of these tell you when scrolling has completed.
scrollViewDidScroll only notifies you that the scroll view did scroll not that it has finished scrolling.
The other method
scrollViewDidEndScrollingAnimation only seems to fire if you programmatically move the scroll view not if the user scrolls.
Does anyone know of scheme to detect when a scroll view has completed scrolling?
The methods you're looking for are
scrollViewDidEndDecelerating:. The first one is always called after the user lifts their finger. If they scrolled fast enough to result in deceleration,
willDecelerate will be
YES and the second method will be called after deceleration completes.