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 any idea about that.

Answer 1

Since iOS 8 you can just use

self.navigationController?.hidesBarsOnSwipe = true

This requires of course that your ViewController is embedded in a NavigationController. All child VC of the NavigationController will inherit this behaviour, so you might want to enable/disable it in viewWillAppear. You can also set the respective flags on the navigation controller in the storyboard.

Answer 2

You can use some git libraries for scrollable Navigation bar whenever you want to scroll your table view/ Scroll top to bottom / bottom to top it will automatically adjust you Navigation bar.

you can use here like this code for use this library like this

Swift

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)

    if let navigationController = self.navigationController as? ScrollingNavigationController {
        navigationController.followScrollView(tableView, delay: 50.0)
    }
}

Objective - C

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [(ScrollingNavigationController *)self.navigationController followScrollView:self.tableView delay:50.0f];
}

It having some delegate methods help for manage all this related to scroll and navigation.

AMScrollingNavbar click here for see

I think this is helpful for you.

Answer 3

Try this:

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    if scrollView.panGestureRecognizer.translation(in: scrollView).y < 0 {
        navigationController?.setNavigationBarHidden(true, animated: true)
    } else {
        navigationController?.setNavigationBarHidden(false, animated: true)
    }
}

Answer 4

create a @property(assign, nonatomic) CGFloat currentOffset;

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    scrollView = self.collectionProductView;
   _currentOffset = self.collectionProductView.contentOffset.y;

}

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{

    CGFloat scrollPos = self.collectionProductView.contentOffset.y ;

    if(scrollPos >= _currentOffset ){
        //Fully hide your toolbar
        [UIView animateWithDuration:2.25 animations:^{
            [self.navigationController setNavigationBarHidden:YES animated:YES];

        }];
    } else {
        //Slide it up incrementally, etc.
        [self.navigationController setNavigationBarHidden:NO animated:YES];
    }
}

Please don't forget to again paste [self.navigationController setNavigationBarHidden:NO animated:YES];

at - viewwilldisappear or whenever the controller is moving to another because this may cause next view controller navigation bar to disappear.

Answer 5

 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;
       }