UICollectionView and Supplementary View (header)

Question

Trying to add a a Supplementary view into my UICollectionView as a header. I\'m having issues getting it to work.

I use a custom UICollectionViewFlowL

Answer 1

This answer is similar to the others where you create a method that checks for the data source, but it's a bit simpler. It seems the issue is related to the collection view's layout sticking around after the collection has been released. So I zeroed out the layout's properties as below and the error disappeared.

deinit {
    let layout = self.collectionView.collectionViewLayout as! UICollectionViewFlowLayout
    layout.estimatedItemSize = CGSizeZero
    layout.sectionInset = UIEdgeInsetsZero
    layout.headerReferenceSize = CGSizeZero
}