如何在滚动 UITableview 时隐藏 UIView（集合视图）？

Question

I am trying to slide up the upper view(Collection view), as the user scrolls up the tableview,and reveal it as the user scrolls down. I do not know how to go about this. I have tried looking as the scrollView didScroll function, but I am lost as how to set this up. Any advice?

Answer 1

UITableViewDelegate also serves UIScrollViewDelegate as you can see in the documentation:

public protocol UITableViewDelegate : UIScrollViewDelegate

Try this:

override func scrollViewDidScroll(_ scrollView: UIScrollView) {
        if(scrollView.panGestureRecognizer.translation(in: scrollView.superview).y > 0)
        {
            print("scrolled up")
            //show the collection view here
        }
        else
        {
            print("scrolled down")
            //hide the collection view here
        }
    }

In case you want to slide the collectionView instead of hiding it as you said in the comment below, I suggest you to follow this answer: https://stackoverflow.com/a/38597530/13839521