Scroll table view header with table scroll

UIKit_TableView+ScrollHeader.swift

// MARK: - Extension :: UIScrollViewDelegate ::

extension ViewController: UIScrollViewDelegate {

    func scrollViewDidScroll(_ scrollView: UIScrollView) {

        //--- Scroll Table Header with Table Scroll ---//
        if let tableView = scrollView as? UITableView {
            if let visible = tableView.indexPathsForVisibleRows {
                if let first = visible.first {
                    let headerHeight = tableView.rectForHeader(inSection: first.section).size.height
                    let offset =  max(min(0, -tableView.contentOffset.y), -headerHeight)
                    self.tblView.contentInset = UIEdgeInsets(top: offset, left: 0, bottom: -offset, right: 0)
                }
            }
        }
   }
}