swift 5 scrollview scrolltotop code example
Example 1: swift collectionview scrolltoitem
self.collectionView.scrollToItem(at:IndexPath(item: indexNumber, section: sectionNumber), at: .right, animated: false)
Example 2: swift scrollview scroll to bottom
let bottomOffset = CGPoint(x: 0, y: scrollView.contentSize.height - scrollView.bounds.size.height)
//OR
//let bottomOffset = CGPoint(x: 0, y: scrollView.frame.maxY)
scrollView.setContentOffset(bottomOffset, animated: true)