[iOS][CV2]Fixed Selected item color changes from lightskyblue to lightgray after scrolling when deploying ManualMaui Demo project on iOS 26.1

[KarthikRajaKalaimani]

Issue Details:

The user has implemented a VisualStateManager for the Grid.BackgroundColor (which is Item template in collectionview) property to apply a selected background color. However, on the iOS platform, the selected item’s background color changes unexpectedly—from LightSkyBlue back to the default gray—when scrolling from bottom to top.

Root Cause:

iOS uses a native UICollectionView, which reuses cells by default. When the collection view loads scrollable items, it initially creates only the cells required for the visible area. As the user scrolls, previously created cells are reused or recreated for new items.
When scrolling back to a previously selected item, the corresponding cell is reused and recreated. At this point, the selected cell incorrectly receives the default gray background color, because in the GetCell method of the ItemsViewController2 class (line 112). the reused cell is instantiated with the default background color defined in the constructor of ItemsViewCell2. The selected background color is not re-applied to the reused cell, causing the color to appear as gray.

Description of Change:

To ensure the correct selected state is applied when a cell is reused:

• UpdateVisualStates() is called to re-apply the appropriate VisualStateManager styles to the template views- but only for selected cells.
• UpdateSelectionColor() is invoked to clear the default selection background—but only for selected cells.
  These updates were added to the BindVirtualView method in the TemplatedCell2 class to ensure the correct selected background color is consistently applied, even when cells are reused.

Tested the behavior in the following platforms.

The test case for this scenario is not included in this PR, because the issue occurs very randomly. So, manually tested the fix.

• Android
• Windows
• iOS
• Mac

Reference:

N/A

Issues Fixed:

Fixes #32493

Closes #32795

Screenshots

Before	After
BeforeFix.mov	AfterFix.mov

[sheiksyedm]

/azp run

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[Copilot]

Pull request overview

This PR fixes an iOS-specific issue where CollectionView selected item background colors defined via VisualStateManager incorrectly revert to the default gray color when cells are reused during scrolling. The fix ensures that when a cell is reused for a selected item, the correct visual state and selection color are reapplied.

Key Changes:

• Added logic to reapply VisualStateManager states and selection colors when binding a cell that is in the selected state
• The fix is specific to iOS CollectionView2 implementation (Items2 handlers)

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.