scrollViewWillEndDragging

scrollViewWillEndDragging.swift

func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
        guard self.topSectionViewTopConstraint.constant > 0 else { return }

        let tableViewOffset = tableViewTopEdgeInset + scrollView.contentOffset.y
        let topSectionViewTop = tableViewTopEdgeInset - listHeaderView.dimViewHeight
        //-160 ~ 0
        var offset = (topSectionViewTop - tableViewOffset)
        offset = offset > topSectionViewTop / 2.c ? -tableViewTopEdgeInset : -listHeaderView.dimViewHeight.c

        targetContentOffset.pointee.y = offset
    }