Hide NavigationBar when scrolling tableView in CollectionView?

Question

I have collectionViewController and collectionViewCell include TableView.CollectionView is horizontal layout.I want hide navigationbar when scroll the tableView. Is there an

Answer 1

 func scrollViewDidScroll(_ scrollView: UIScrollView)
       {
           //  var navigationBarFrame   = self.navigationController!.navigationBar.frame
           let currentOffset = scrollView.contentOffset

           if (currentOffset.y > (self.lastContentOffset?.y)!) {
               if currentOffset.y > 0 {
                   initial = initial - fabs(CGFloat(currentOffset.y - self.lastContentOffset!.y))
               }
               else if scrollView.contentSize.height < scrollView.frame.size.height {
                   initial = initial + fabs(CGFloat(currentOffset.y - self.lastContentOffset!.y))
               }
           }
           else {
               if currentOffset.y < scrollView.contentSize.height - scrollView.frame.size.height {
                   initial = initial + fabs(CGFloat(currentOffset.y - self.lastContentOffset!.y))
               }
               else if scrollView.contentSize.height < scrollView.frame.size.height && initial < maxPlus {
                   initial = initial - fabs(CGFloat(currentOffset.y - self.lastContentOffset!.y))
               }
           }

           if (initial <= maxMinus){
               initial =  maxMinus
               self.tableviewTopConstrin.constant = 0
               UIView.animate(withDuration: 0.4, animations: {
                   self.view.layoutIfNeeded()
               })

           }else if(initial >= maxPlus){
               initial = maxPlus
               self.tableviewTopConstrin.constant = 70
               UIView.animate(withDuration: 0.4, animations: {
                   self.view.layoutIfNeeded()
               })
           }else{
           }
           self.lastContentOffset = currentOffset;
       }