CollectionView2 Items display issue when Header/Footer is resized on iOS

[kubaflo]

Description

This is a proposal for the CV2. A fix for the CV1, which is also not working, is here: #21812

Issues Fixed

Fixes #20538
Fixes #12429

Before	After
Simulator.Screen.Recording.-.iPhone.15.Pro.Max.-.2024-04-13.at.17.21.10.mp4	Simulator.Screen.Recording.-.iPhone.15.Pro.Max.-.2024-04-13.at.17.17.05.mp4

[rmarinho]

/azp run

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Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/azp run

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Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/rebase

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[sheiksyedm]

@kubaflo #27076 (comment)
Could you please update the missing snapshots from the latest build?

[kubaflo]

@kubaflo #27076 (comment) Could you please update the missing snapshots from the latest build?

The snapshot is already in the repo

[vikher]

I had to disable the following code for the .NET 9 handlers for iOS CollectionView and CarouselView in my app:

// new .Net 9 handlers for iOS CollectionView and Carouselview
// handlers.AddHandler<Microsoft.Maui.Controls.CollectionView, Microsoft.Maui.Controls.Handlers.Items2.CollectionViewHandler2>();

This is because my app has a CollectionView header with an expander inside, and every time it expands, it needs to recalculate the height of the header. With the current implementation, this functionality isn't behaving as expected.

Do you have an idea of when you plan on releasing this update?

[kubaflo]

Hi, @vikher can you confirm if this PR fixes your issue?

[PureWeen]

closing in favor of #25664

@albyrock87 is @kubaflo 's scenario accounted for on your PR?

[albyrock87]

@PureWeen it does now: 025e9ad

Thanks for pointing this out!