CollectionView: Item indices in the Scrolled event args (ItemsViewScrolledEventArgs) are incorrect on iOS when IsGrouped = true

Question

When a CollectionView's IsGrouped property is set to true, the values of FirstVisibleItemIndex, CenterItemIndex, and LastVisibleItemIndex specified in the ItemsViewScrolledEventArgs passed to the Scrolled event handler are incorrect. They appear to be unable to reflect the indicies of any items beyond the first group.

This issue has already been raised in various forums before, but no solution has been found.

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

the values of FirstVisibleItemIndex ... specified in the ItemsViewScrolledEventArgs passed to the Scrolled event handler are incorrect

I tested the function with the lastest Xamarin.Forms and reproduced the issue on my side. Someone faced the simialr issue on previous version and has reported it to the Xamarin.Forms github repo. You could add your problem to the topic. Here is the link: https://github.com/xamarin/Xamarin.Forms/issues/10389

Best Regards,

Jarvan Zhang

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