Check if tab bar hidden value actually changed for Shell #31149
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Pull Request Overview
This PR fixes an infinite loop issue in iOS 26 where setting the TabBarHidden property triggers ViewWillLayoutSubviews, which in turn calls UpdateTabBarHidden() again. The fix adds a simple value comparison check to prevent unnecessary property updates when the value hasn't actually changed.
- Adds early return when
TabBarHiddenalready matches the desired state - Prevents infinite loop by avoiding redundant property assignments
- Applied broadly rather than iOS 26-specific for general defensive programming
Comments suppressed due to low confidence (1)
jfversluis
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dalexsoto
approved these changes
Aug 13, 2025
mattleibow
approved these changes
Aug 13, 2025
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/backport main |
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/backport to main |
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Started backporting to main: https://github.com/dotnet/maui/actions/runs/16966624735 |
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/backport to release/9.0.1xx-sr8 |
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Started backporting to release/9.0.1xx-sr8: https://github.com/dotnet/maui/actions/runs/17976094094 |
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Description of Change
Adds a check to see if the value is actually different and only apply the change when it is different. It seems that for iOS 26 a change has been made that setting the
TabBarHiddenproperty now causesViewWillLayoutSubviewsto be triggered, which in turns updates theTabBarHiddencausing an infinite loop. This change prevents that.Since its a good thing to check anyway, not making this specific to iOS 26, although we could to be on the safe side