In iOS 18 beta, UICollectionView/scrollToItem(at:at:animated:) now scrolls at 4 FPS

UI Frameworks UIKit
drewolbrich OP
Created Aug ’24
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In iOS 18.0, UICollectionView/scrollToItem(at:at:animated:) causes UICollectionView to scroll with an awkward stuttered animation at about 4 frames per second on the device.

This behavior is not observed in iOS 15, 16, or 17.

I submitted FB13986989 about this issue 6 weeks ago when I first observed it in iOS 18 beta 1, but I have not received a response.

The issue has not been fixed in iOS 18.0 beta 2, 3, or 4.

Is this a known issue? Does Apple intend to fix it?

Assuming Apple has not prioritized fixing this bug, could a UIKit engineer suggest a workaround?

My app relies on scrollTo working properly and now looks awful on iOS 18.

Thank you for any assistance you can provide.

Replies  2
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Apple Staff OP
Apple
Aug ’24

Hi, sorry for the delayed response to your feedback! We are not currently aware of any issues with scrollToItem(at:animated:). Could you please provide a sample that reproduces the issue? You can respond in Feedback Assistant, or here on the forums.

0
drewolbrich OP
Aug ’24

Thank you for responding. I will try to create a sample app that reproduces the issue.

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In iOS 18 beta, UICollectionView/scrollToItem(at:at:animated:) now scrolls at 4 FPS
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