How to make a UIScrollView snap to icons (like App Store: Feature)

Question

What I want to get is the same behaviour that this scroll view has:

Answer 1

Simple solution, works like App Store, with velocity or without it. kCellBaseWidth — width of cell.

- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView
                     withVelocity:(CGPoint)velocity
              targetContentOffset:(inout CGPoint *)targetContentOffset
{
    NSInteger index = lrint(targetContentOffset->x/kCellBaseWidth);
    targetContentOffset->x = index * kCellBaseWidth;
}