Scroll UICollectionView to section header view

First, get the frame for the header in the section:

- (CGRect)frameForHeaderForSection:(NSInteger)section {
    NSIndexPath *indexPath = [NSIndexPath indexPathForItem:1 inSection:section];
    UICollectionViewLayoutAttributes *attributes = [self.collectionView layoutAttributesForItemAtIndexPath:indexPath];
    CGRect frameForFirstCell = attributes.frame;
    CGFloat headerHeight = [self collectionView:_collectionView layout:_layout referenceSizeForHeaderInSection:section].height;
    return CGRectOffset(frameForFirstCell, 0, -headerHeight);
}

Note: I just put a value of 1 for the indexPath.item. You might need to change this to something appropriate for your implementation.

Then, scroll the UIScrollView to the point at the top of the header:

- (void)scrollToTopOfSection:(NSInteger)section animated:(BOOL)animated {
    CGRect headerRect = [self frameForHeaderForSection:section];
    CGPoint topOfHeader = CGPointMake(0, headerRect.origin.y - _collectionView.contentInset.top);
    [_collectionView setContentOffset:topOfHeader animated:animated];
}

Note: you must subtract the contentInset, otherwise it will be discarded and your scrollview will scroll behind the status bar and/or navigation bar.

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)
}

I think this may help you

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

Then you can access the location through attributes.frame

Based on @pixelfreak answer

Swift 4.2 + iOS 11 Safe Area SUPPORT (for iPhone X and above)

if let attributes = collectionView.layoutAttributesForSupplementaryElement(ofKind: UICollectionView.elementKindSectionHeader, at: IndexPath(item: 0, section: section)) {
    var offsetY = attributes.frame.origin.y - collectionView.contentInset.top
    if #available(iOS 11.0, *) {
        offsetY -= collectionView.safeAreaInsets.top
    }
    collectionView.setContentOffset(CGPoint(x: 0, y: offsetY), animated: true) // or animated: false
}

HAPPY CODING