CSStickyHeaderFlowLayout: iOS 10 crash - Layout Attributes

Getting this crash when scrolling up in a UICollectionView section that has a sticky header:

layout attributes for supplementary item at index path (<NSIndexPath: 0xc000000000000116> {length = 2, path = 1 - 0}) changed from <CSStickyHeaderFlowLayout: 0x7fe26a858880> indexPath: {1, 0} zIndex: 1024 valid: YES kind: UICollectionElementKindSectionHeader to <CSStickyHeaderFlowLayout: 0x7fe26a85dd80> indexPath: {1, 0} zIndex: 1024 valid: YES kind: UICollectionElementKindSectionHeader without invalidating the layout

It seems like the header is switching incorrectly?

About this issue

Original URL
State: open
Created 8 years ago
Comments: 22 (4 by maintainers)

Most upvoted comments

Thanks @chrene! I’ve disabled prefetching in my UICollectionViewController like so:

override func viewDidLoad() {
    super.viewDidLoad()
    if #available(iOS 10.0, *) {
        self.collectionView?.isPrefetchingEnabled = false
    } else {
        //Fallback on earlier versions
    }
}

The crash is fixed with this update.

+37

chriscohoat on Sep 15, 2016

Getting this as well!

+10

GabeJacobs on Sep 6, 2016

I have also written the library in swift and I’m planning on bumping the version in the near future. I don’t get the crash from the swift branch, BUT be careful about using that in production. It still needs a lot of testing 😃

chrene on Sep 15, 2016

I see, just updated to xcode 8 and running iOS 10 and it does crash. I saw a pull request that disables prefetching, but I’m trying to find a more robust fix. Basically as a workaround you can disable prefetching on your collection view to avoid the crash.

chrene on Sep 14, 2016

for me im experiencing the same error as mayanktiwari. However if anybody comes across this self.collectionView?.isPrefetchingEnabled = false did fix it for me though.

mennolaan on Oct 9, 2017

@zachlucas however this guy does it seems to avoid the crash https://github.com/Produkt/PDKTStickySectionHeadersCollectionViewLayout

GabeJacobs on Sep 7, 2016

@jamztang any idea on this one? Seems to happen when scrolling back up.

zachlucas on Sep 7, 2016

I am facing the same exception when i try to scroll up my collectionView Programmatically … but this is only happening when i am running it on iOS 11 beta5 using Xcode 9 beta 2

mihirpmehta on Aug 10, 2017