Stick header scroll down with other like header in tableview.

[qhu91it]

I try to make header stick when scrolling up and move down with other when contentOffset.y < 0. It works when scrolling slowly but when scroll so fast header move the wrong frame.
Any suggestion help me out of this?
Thanks.

[qhu91it]

Finally, I got this solution to work.
define the value

let originY: CGFloat = 0
let floatingSectionOriginY = collectionView.contentOffset.y

If scrolling up use value from contentOffset.y to keep row is floating.

var selectedOriginY = originY
if floatingSectionOriginY >= originY {
 selectedOriginY = floatingSectionOriginY
}

Full code

override func prepare() {
 guard delegate != nil,
 let collectionView = collectionView,
 collectionView.numberOfSections > 0
 else { return }
 
 if itemAttributes.count != collectionView.numberOfSections {
 generateItemAttributes(collectionView: collectionView)
 return
 }
 
 let originY: CGFloat = 0
 let floatingSectionOriginY = collectionView.contentOffset.y
 let originX: CGFloat = 0
 let floatingSectionOriginX = collectionView.contentOffset.x
 
 for section in 0..<collectionView.numberOfSections {
 for item in 0..<collectionView.numberOfItems(inSection: section) {
 if section >= delegate.numberOfFirstRowFloat() 
 && item >= delegate.numberOfFirstColumnFloat() {
 continue
 }
 
 let attributes = layoutAttributesForItem(at: IndexPath(item: item, section: section))!
 
 if section < delegate.numberOfFirstRowFloat() {
 var selectedOriginY = originY
 if floatingSectionOriginY >= originY {
 selectedOriginY = floatingSectionOriginY
 }
 var frame = attributes.frame
 let size = itemsSize[item]
 frame.origin.y = selectedOriginY + (size.height * CGFloat(section))
 attributes.frame = frame
 }
 
 if item < delegate.numberOfFirstColumnFloat() {
 var selectedOriginX = originX
 if floatingSectionOriginX >= originX {
 selectedOriginX = floatingSectionOriginX
 }
 var frame = attributes.frame
 let prevItem = item - 1
 if prevItem < 0 {
 frame.origin.x = selectedOriginX
 } else {
 let size = itemsSize[prevItem]
 frame.origin.x = selectedOriginX + (size.width * CGFloat(item))
 }
 attributes.frame = frame
 }
 }
 }
 }