UICollectionView scroll to make section header visible

collectionViewScroll

 /**
    Scroll to make the the given section header visible.
    The function scrollToItemAtIndexPath will scroll to the item and hide the section header.
    Swift 3.
    */
    func scrollToSection(_ section:Int)  {
        if let cv = self.collectionView {
            let indexPath = IndexPath(item: 1, section: section)
            if let attributes =  cv.layoutAttributesForSupplementaryElement(ofKind: UICollectionElementKindSectionHeader, at: indexPath) {
                
                let topOfHeader = CGPoint(x: 0, y: attributes.frame.origin.y - cv.contentInset.top)
                cv.setContentOffset(topOfHeader, animated:true)
            }
        }
    }

This functionality not working.

I just tried it again and it works.

Two questions: where do i call this method ? In

func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView 

And, If i have several sections? 


Something like that not work :/ 

```swift 
func scrollToSection(_ section:Int)  {
let numberOfItems =  sections[section].items.count
       if let cv = self.collectionView {
                       let indexPath = numberOfItems.map { IndexPath.init(item: $0, section: section)}
           if let attributes =  cv.layoutAttributesForSupplementaryElement(ofKind: UICollectionElementKindSectionHeader, at: indexPath) {
               
               let topOfHeader = CGPoint(x: 0, y: attributes.frame.origin.y - cv.contentInset.top)
               cv.setContentOffset(topOfHeader, animated:true)
           }
       }
   }

Its working, cool and simple, Thanks!

Love this - it saved me a lot of time! Thank you!