Question

I have a scrollView. Typical tableView Cell. I did things a lot on viewDidScroll.

viewDidScroll is called on 2 cases.

1. User scroll
2. Sometimes user have stop scrolling but the scrollview still scroll anyway due to momentum, bouncing, etc.

So how do I know if users are still touching the scrollView?

Answer 1

UIScrollView has a BOOL property named tracking that is YES while the scroll view has a touch and NO otherwise. In my testing, it is set to NO as soon as the touch ends, even if the view is decelerating (and still sending scrollViewDidScroll: to its delegate). This seems like exactly what you are asking for.

In my testing, the dragging property doesn’t seem to become NO reliably while the view is decelerating after the touch ends.

The decelerating property is also unreliable in my testing. If I touch the scroll view while it is decelerating, decelerating remains YES even though the view has stopped scrolling.