I'm always set the parallaxHeaderReferenceSize's height to fixed numbers like "232".

But I want get the parallaxHeaderReferenceSize's height dynamically.

Is there a way to get the parallaxHeaderReferenceSize's height from xib files?

In viewdidload function.

if let layout = self.collectionViewLayout as? CSStickyHeaderFlowLayout {
layout.parallaxHeaderReferenceSize = CGSize(width: self.view.frame.size.width, height: 232)

        layout.parallaxHeaderMinimumReferenceSize = CGSize(width: self.view.frame.size.width, height: 232)
        layout.parallaxHeaderAlwaysOnTop = false
        layout.disableStretching = true
        layout.detachTopLayout = true
    }

after that

Can I update the layout.parallaxHeaderMinimumReferenceSize? in

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