Scroll UICollectionView to section header view

Question

The code below scrolls to the right cell in UICollectionView, but the section header view is hidden behind UINavigationBar in my case. I believe I should use scrollRectToVisible instead and my question is, what is the right way to calculate the CGRect (y position) when the numberOfRows in a given section is variable.

- (void)scrollToPricing:(NSUInteger)row {      [self.collectionView scrollToItemAtIndexPath:       [NSIndexPath indexPathForItem:0                            inSection:row]                     atScrollPosition:UICollectionViewScrollPositionTop                             animated:YES]; } 

Answer 1

Seems like all the answers are overly complex. This works for me:

let attributes = self.collectionView.collectionViewLayout.layoutAttributesForSupplementaryViewOfKind(UICollectionElementKindSectionHeader, atIndexPath: NSIndexPath(forItem: 0, inSection: section))  self.collectionView.setContentOffset(CGPointMake(0, attributes!.frame.origin.y - self.collectionView.contentInset.top), animated: true) 

Swift 3:

if let attributes = collectionView.collectionViewLayout.layoutAttributesForSupplementaryView(ofKind: UICollectionElementKindSectionHeader, at: IndexPath(item: 0, section: section)) {     collectionView.setContentOffset(CGPoint(x: 0, y: attributes.frame.origin.y - collectionView.contentInset.top), animated: true) } 

Answer 2

I think this may help you

UICollectionViewLayoutAttributes *attributes = [self.collectionView layoutAttributesForItemAtIndexPath:indexPath]; 

Then you can access the location through attributes.frame