How to know if UITableView is being scrolled manually (by hand) or programmatically?

Question

I am using a UITableView in my code and it would be nice to know if the user manually scrolled the UITableView or it was done programmatically. Is there a way to know that?

Answer 1

UITableView is a subclass of UIScrollView. so you can use this

if (!tableView.isDragging && !tableView.isDecelerating)
{
   // the table is *not* being scrolled
}

this works. i use it in one of my apps.

Answer 2

You can implement following method of UIScrollViewDelegate, to know about the scrolling of your table view:

- (void)scrollViewWillBeginDragging:(UIScrollView *)activeScrollView

Don't forget to put this on too...

@interface YourViewController : UIViewController <UIScrollViewDelegate>

Hope it helps, cheers :)

Answer 3

Best method I've found is to use the isTracking property rather than isDragging.

if tableView.isTracking && tableView.isDecelerating {
    // Table was scrolled by user.
}

Answer 4

Use this to detect both fast and slow scrolling caused by user interaction:

if tableView.isDragging, tableView.isDecelerating || tableView.isTracking {
    // Table view is scrolled by user, not by code
}