[Mac] DeviceDisplay.KeepScreenOn not being respected on Mac OS#32708
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Pull request overview
This PR fixes the Mac Catalyst implementation of DeviceDisplay.KeepScreenOn by replacing the non-functional UIApplication.SharedApplication.IdleTimerDisabled approach with proper IOKit power management assertions. The fix adds platform-specific P/Invoke wrappers to interact with macOS's IOKit framework.
Key Changes
- Introduces IOKit P/Invoke wrappers for Mac Catalyst to manage display sleep prevention through power management assertions
- Adds conditional compilation to use IOKit-based implementation for Mac Catalyst while preserving the original
IdleTimerDisabledapproach for iOS - Implements assertion lifecycle management with a finalizer to ensure proper cleanup
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.
| File | Description |
|---|---|
| src/Essentials/src/Platform/IOKit.maccatalyst.cs | New file providing P/Invoke wrappers for IOPMAssertionCreateWithName and IOPMAssertionRelease, enabling Mac Catalyst to prevent display sleep through IOKit power management assertions |
| src/Essentials/src/DeviceDisplay/DeviceDisplay.ios.cs | Adds Mac Catalyst-specific implementation using IOKit assertions with conditional compilation (#if MACCATALYST), while preserving existing iOS behavior using IdleTimerDisabled |
| } | ||
|
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| /// <summary> | ||
| /// Finalizer to ensures IOKit assertion is released when object is disposed |
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Spelling error: "ensures" should be "ensure". The correct form is "Finalizer to ensure IOKit assertion is released when object is disposed".
Suggested change
| /// Finalizer to ensures IOKit assertion is released when object is disposed | |
| /// Finalizer to ensure IOKit assertion is released when object is disposed |
Comment on lines
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| ~DeviceDisplayImplementation() | ||
| { | ||
| // Check if there's an active IOKit assertion that needs to be released | ||
| if (keepScreenOnId != 0) | ||
| { | ||
| // Release the IOKit assertion to allow the display to sleep | ||
| PlatformIOKit.AllowUserIdleDisplaySleep(keepScreenOnId); | ||
| keepScreenOnId = 0; | ||
| } | ||
| } |
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Finalizers should not access native resources: Finalizers run on a separate finalizer thread and cannot safely call native code like IOPMAssertionRelease. The finalizer thread has no guarantee about the state of native interop at the time it runs, which could lead to crashes or resource corruption.
Consider implementing IDisposable pattern instead, or removing the finalizer entirely. Looking at other platform implementations (Windows, Android), they don't use finalizers for cleanup. The singleton nature of DeviceDisplayImplementation (created via DeviceDisplay.Current) means it typically lives for the application lifetime, so automatic cleanup at app shutdown should handle the assertion release.
If cleanup is critical, implement IDisposable:
public void Dispose()
{
if (keepScreenOnId != 0)
{
PlatformIOKit.AllowUserIdleDisplaySleep(keepScreenOnId);
keepScreenOnId = 0;
}
}
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🚀 Dogfood this PR with:
curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 32708Or
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| # | Source | Approach | Test Result | Files Changed | Notes |
|---|---|---|---|---|---|
| PR | PR #32708 | #if MACCATALYST: use NSProcessInfo.BeginActivity(IdleDisplaySleepDisabled | UserInitiated, "KeepScreenOn") + lock(locker); #else (iOS): keep existing IdleTimerDisabled path. |
⏳ PENDING (Gate skipped) | DeviceDisplay.ios.cs |
1 file, no custom P/Invoke, thread-safe. |
🔧 Fix — Analysis & Comparison
Fix Candidates
| # | Source | Approach | Test Result | Files Changed | Notes |
|---|---|---|---|---|---|
| 1 | claude-opus-4.6 | IOKit P/Invoke: IOPMAssertionCreateWithName("PreventUserIdleDisplaySleep") / IOPMAssertionRelease with lock(locker) + s_assertionId in #if MACCATALYST |
✅ PASS (232 passed) | 1 file (DeviceDisplay.ios.cs) |
Low-level macOS API; works but requires DllImport/IntPtr. More complex than PR. |
| 2 | claude-sonnet-4.6 | Separate .maccatalyst.cs file using NSProcessInfo.BeginActivity(IdleDisplaySleepDisabled | UserInitiated) + #if !MACCATALYST guard in .ios.cs |
✅ PASS (464 passed) | 2 files (.ios.cs + new .maccatalyst.cs) |
Idiomatic MAUI file-split; same API as PR but in dedicated file. Cleaner separation. |
| 3 | gpt-5.3-codex | NSProcessInfo.BeginActivity(NSActivityOptions.IdleDisplaySleepDisabled) — same as PR but WITHOUT UserInitiated flag |
✅ PASS (696 passed) | 1 file (DeviceDisplay.ios.cs) |
Minor PR variant; IdleDisplaySleepDisabled is the key flag; omitting UserInitiated loses semantic context. |
| 4 | gpt-5.4 (gemini unavailable) | NSProcessInfo.BeginActivity(NSActivityOptions.IdleDisplaySleepDisabled | NSActivityOptions.AutomaticTerminationDisabled) |
✅ PASS (928 passed) | 1 file (DeviceDisplay.ios.cs) |
Uses different flag combo; AutomaticTerminationDisabled is not semantically appropriate for screen-on. |
| PR | PR #32708 | NSProcessInfo.BeginActivity(NSActivityOptions.IdleDisplaySleepDisabled | NSActivityOptions.UserInitiated, "KeepScreenOn") + lock(locker) + NSObject? keepScreenOnActivity token in #if MACCATALYST |
DeviceDisplay.ios.cs |
Best flag combination: IdleDisplaySleepDisabled explicitly prevents display sleep; UserInitiated provides correct semantic context. Thread-safe. No custom P/Invoke. |
Cross-Pollination
| Model | Round | New Ideas? | Details |
|---|---|---|---|
| claude-opus-4.6 | 2 | No | NO NEW IDEAS — Only two proper macOS APIs exist for preventing display sleep: IOKit assertions (Attempt 1) and NSProcessInfo.BeginActivity (PR + Attempts 2-4). All viable mechanisms covered. |
Exhausted: Yes (all 4 models queried; cross-pollination confirms no new mechanisms available)
Selected Fix: PR's fix — NSProcessInfo.BeginActivity(IdleDisplaySleepDisabled | UserInitiated) — Reason: The PR uses the correct combination of flags. IdleDisplaySleepDisabled explicitly prevents display sleep (the key flag); UserInitiated provides proper semantic context to the OS, matching Apple's recommended usage for user-visible long-running operations. Thread-safe with lock(locker). No custom P/Invoke. Attempt 2 (separate .maccatalyst.cs file) is the strongest structural alternative — more idiomatic MAUI file organization — but uses the same API as the PR. Attempt 1 (IOKit) works but is unnecessarily low-level. Attempts 3 and 4 use incomplete flag combinations.
📋 Report — Final Recommendation
✅ Final Recommendation: APPROVE
Phase Status
| Phase | Status | Notes |
|---|---|---|
| Pre-Flight | ✅ COMPLETE | Issue #26059 reviewed; 1 implementation file, 0 test files. Prior review concerns addressed by author. |
| Gate | Platform catalyst; no PR tests detected. |
|
| Try-Fix | ✅ COMPLETE | 4 model attempts + cross-pollination; PR's fix confirmed as best approach. |
| Report | ✅ COMPLETE |
Summary
PR #32708 addresses a confirmed bug: UIApplication.SharedApplication.IdleTimerDisabled is silently ignored on Mac Catalyst, making DeviceDisplay.KeepScreenOn = true a no-op on macOS. This PR has been through a prior agent review cycle (2026-03-19) that requested changes on an older IOKit P/Invoke implementation; the author has since completely reworked the fix. The updated implementation uses NSProcessInfo.BeginActivity — the high-level Foundation API recommended by Apple — with proper thread safety and no custom interop.
Try-Fix exploration this cycle confirmed all viable macOS APIs for preventing display sleep were explored (IOKit P/Invoke ✅, NSProcessInfo variants ✅, separate file structure ✅). The PR's approach uses the most semantically correct flag combination and is the cleanest implementation.
Root Cause
UIApplication.SharedApplication.IdleTimerDisabled is an iOS-only API. On Mac Catalyst, DeviceDisplay.ios.cs compiles for both iOS and Mac Catalyst (due to the .ios.cs extension), so both platforms shared the same broken iOS-only implementation. The IdleTimerDisabled property is silently ignored on macOS, leaving KeepScreenOn permanently inactive on Mac Catalyst.
Fix Quality
The updated implementation is correct and clean:
- Correct API:
NSProcessInfo.BeginActivity(NSActivityOptions.IdleDisplaySleepDisabled | NSActivityOptions.UserInitiated, "KeepScreenOn")is the Apple-recommended API for preventing display sleep from a Mac app.IdleDisplaySleepDisabledis the flag that explicitly prevents display sleep;UserInitiatedprovides correct semantic context to the OS. - Thread safety:
lock(locker)protects bothGetKeepScreenOn()andSetKeepScreenOn()— consistent with the Windows implementation pattern. - No state inconsistency:
NSProcessInfo.EndActivity()has no failure mode (unlikeIOPMAssertionRelease), so the stored token is always valid while active. - Minimal change: 1 file modified. No custom P/Invoke, no additional files.
- Guard pattern: Early-return
if ((keepScreenOnActivity is not null) == keepScreenOn) return;prevents redundantBeginActivity/EndActivitycalls. - All prior reviewer concerns resolved: The prior review's IOKit-specific concerns (state inconsistency, missing lock) are moot — the IOKit implementation was completely replaced.
One minor observation (non-blocking): If NSProcessInfo.BeginActivity returns null (extremely unlikely per Apple's documentation, which states beginActivityWithOptions:reason: never returns nil), keepScreenOnActivity would be null and GetKeepScreenOn() would return false despite intent. This is theoretical only.
Test coverage gap (pre-existing, not introduced by this PR): The ScreenLock_Locks, ScreenLock_Unlocks_Without_Locking, and ScreenLock_Locks_Only_Once device tests are excluded on Mac Catalyst via [Trait(Traits.UI, Traits.FeatureSupport.Supported)] filtering. No automated test currently validates KeepScreenOn behavior on Mac Catalyst. Suggest enabling or adding a Mac Catalyst-specific round-trip test.
Structural alternative (optional, non-blocking): Try-Fix Attempt 2 demonstrated that a separate .maccatalyst.cs file is a valid and idiomatic MAUI approach (no #if directives needed in .ios.cs). This is a viable refactor suggestion but is not required — the PR's #if MACCATALYST approach is also acceptable.
Selected Fix: PR
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<!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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…t#32708) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes dotnet#26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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<!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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…t#32708) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes dotnet#26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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<!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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<!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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<!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> ### Issue Details - When DeviceDisplay.KeepScreenOn was set to true, it was not working properly on Mac ### Root Cause of the issue - UIApplication.SharedApplication.IdleTimerDisabled works only on iOS; it does not work on Mac. ### Description of Change **Mac Catalyst support for screen-on functionality:** * Added platform-specific logic in `DeviceDisplayImplementation` to use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifying `IdleTimerDisabled` as on iOS. * Introduced the internal static `IOKit` class with P/Invoke wrappers for `IOPMAssertionCreateWithName` and `IOPMAssertionRelease`, enabling assertion management for display sleep prevention on Mac Catalyst. **Dependency and import updates:** * Added `System.Runtime.InteropServices` and `CoreFoundation` imports to support native interop required for IOKit assertion management. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #26059 ### Tested the behaviour in the following platforms - [x] - Windows - [ ] - Android - [ ] - iOS - [x] - Mac <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
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[[Android & iOS] Setting an invalid CurrentItem causes scroll to last item in looped CarouselView](#32139) </details> - [Android] IndicatorView: Add TalkBack accessibility descriptions for indicators by @praveenkumarkarunanithi in #31775 <details> <summary>🔧 Fixes</summary> - [[Android] IndicatorView does not convey correct accessibility information](#31446) </details> - [iOS, macOS] Fixed CollectionView KeepLastItemInView Not Updating Correctly When Items Are Added Dynamically by @NanthiniMahalingam in #32191 <details> <summary>🔧 Fixes</summary> - [[.NET10] I9 - Scroll_Position - "KeepLastItemInView" does not keep the last item at the end of the displayed list when adding new items.](#31825) </details> - [Windows, Android] Resolved issue with dynamic Header/Footer reassignment in CollectionView. by @prakashKannanSf3972 in #28403 <details> <summary>🔧 Fixes</summary> - [[Windows, Android] Toggling Header/Footer in CollectionView Dynamically is not working](#27959) - [CollectionView HeaderTemplate and FooterTemplate are not displayed when ItemsSource is initially set to null](#28337) - [[Android] Header and Footer Not Visible in CollectionView When EmptyView is Selected First](#28351) </details> - [Android] Fix CollectionView inside disabled RefreshView blocks scroll by @Vignesh-SF3580 in #34702 <details> <summary>🔧 Fixes</summary> - [C6-The C6 page cannot scroll on Windows and Android platforms.](#34666) </details> - [Android] CollectionView: Fix SelectedItem visual state not applying when re-selecting same item by @KarthikRajaKalaimani in #31591 <details> <summary>🔧 Fixes</summary> - [CollectionView - SelectedItem visual state manager not working](#20062) </details> - [Windows] Fixed CollectionView.EmptyView can not be removed by setting it to Null by @Dhivya-SF4094 in #29487 <details> <summary>🔧 Fixes</summary> - [[Windows] CollectionView.EmptyView can not be removed by setting it to Null](#18657) - [[Windows] EmptyViewTemplate Not Working in CarouselView](#29463) - [EmptyViewTemplate does not do anything](#18551) - [[MAUI] I5_EmptyView - The data template selector cannot display the correct string.](#23330) </details> - [iOS] Support for IsSwipeEnabled on CarouselView2 by @kubaflo in #29996 <details> <summary>🔧 Fixes</summary> - [[iOS] IsSwipeEnabled Not Working on CarouselView (CV2)](#29391) </details> - [iOS, MacOS] Fixed FlowDirection not working on Header/Footer in CollectionView by @Dhivya-SF4094 in #32775 <details> <summary>🔧 Fixes</summary> - [[iOS, MacOS] FlowDirection not working on Header/Footer in CollectionView](#32771) </details> - [iOS] CollectionView: Fix drag-and-drop reordering into empty groups by @SuthiYuvaraj in #34151 <details> <summary>🔧 Fixes</summary> - [CollectionView Drag and Drop Reordering Can't Drop in Empty Group](#12008) </details> - [Android] CollectionView: Fix drag-and-drop reordering into empty groups by @SuthiYuvaraj in #31867 <details> <summary>🔧 Fixes</summary> - [CollectionView Drag and Drop Reordering Can't Drop in Empty Group](#12008) </details> - [iOS] Fix vertical CarouselView MandatorySingle snapping on iOS by @Vignesh-SF3580 in #34700 <details> <summary>🔧 Fixes</summary> - [CarouselView vertical snap points ignored on iOS with Microsoft.Maui.Controls v10.0.20 (regression from v9.0.120)](#33308) </details> - [iOS26] Fix CarouselView scrolling to wrong item when navigating to last item by @Vignesh-SF3580 in #34013 <details> <summary>🔧 Fixes</summary> - [[iOS 26] CarouselView does not scroll to the correct last item](#33770) </details> - Fixed the OnPlatform does not work for header property in Collection view by @NanthiniMahalingam in #28935 <details> <summary>🔧 Fixes</summary> - [OnPlatform does not work in Header of CollectionView](#25124) </details> - [Android] [Candidate branch] Fix VerifySelectedItemClearsOnNullAssignment, CollectionViewSelectionShouldClear, SelectedItemVisualIsCleared UI test failure on Android by @KarthikRajaKalaimani in #34928 ## DateTimePicker - [iOS] Fix for DatePicker FlowDirection Not Working on iOS by @SyedAbdulAzeemSF4852 in #30193 <details> <summary>🔧 Fixes</summary> - [[iOS] DatePicker FlowDirection Not Working on iOS](#30065) </details> ## Drawing - [Shapes] Line: Fix asymmetric Stretch.None path translation when right/bottom edge overflows by @NirmalKumarYuvaraj in #34385 <details> <summary>🔧 Fixes</summary> - [Line coordinates not computed correctly](#11404) - [Lines not drawing correctly](#26961) </details> - [Android] Fixed GraphicsView drawable is visible outside the canvas by @NirmalKumarYuvaraj in #28353 <details> <summary>🔧 Fixes</summary> - [[Android] GraphicsView， The drawn image can also be visible outside the canvas](#20834) </details> - Fixed Custom Drawable does not support binding by @NirmalKumarYuvaraj in #29442 <details> <summary>🔧 Fixes</summary> - [Custom IDrawable control does not databind to a model property when used inside a CollectionView ItemTemplate](#20991) </details> - Added a support for GradientBrushes on Shape.Stroke by @kubaflo in #22208 <details> <summary>🔧 Fixes</summary> - [GradientBrushes are not supported on Shape.Stroke](#21983) </details> ## Editor - Fixed Editor HorizontalTextAlignment does not update at run time by @NirmalKumarYuvaraj in #25129 <details> <summary>🔧 Fixes</summary> - [Editor HorizontalTextAlignment Does not Works.](#10987) - [[iOS/MacOs] Right-To-Left (RTL) alignment is not applied to Editor placeholder](#30052) </details> - [Windows] Fixed Entry Editor placeholder Text CharacterSpacing by @SubhikshaSf4851 in #30324 <details> <summary>🔧 Fixes</summary> - [[Windows] CharacterSpacing not applied to Placeholder text in Entry and Editor controls](#30071) </details> ## Entry - [Windows] Fix fo setting an Entry's Keyboard to Date causes it to be interpreted as a password input by @SyedAbdulAzeemSF4852 in #29344 <details> <summary>🔧 Fixes</summary> - [[Windows] Entry Keyboad-Type "Date" results in Password-Entry](#28975) </details> - [Android] Exception thrown when give more than 5000 characters to the Text property of Entry. by @KarthikRajaKalaimani in #30242 <details> <summary>🔧 Fixes</summary> - [Android crash when Entry has >5000 characters](#30144) </details> ## Essentials - Bump MonoApiToolsMSBuildTasksPackageVersion to 0.5.0 and ship Essentials.AI public APIs by @mattleibow via @Copilot in #34574 - [Mac] DeviceDisplay.KeepScreenOn not being respected on Mac OS by @HarishwaranVijayakumar in #32708 <details> <summary>🔧 Fixes</summary> - [[Mac Catalyst] DeviceDisplay.KeepScreenOn not being respected on Mac OS](#26059) </details> ## Flyoutpage - [Windows] FlyoutPage: update CollapseStyle at runtime by @devanathan-vaithiyanathan in #29927 <details> <summary>🔧 Fixes</summary> - [Flyout Page SetCollapseStyle doesn't have any change](#18200) </details> ## Gestures - [Android] Fix for TapGestureRecognizer doesn't fire by @HarishwaranVijayakumar in #34497 <details> <summary>🔧 Fixes</summary> - [[Android] TapGestureRecognizer doesn't fire](#5825) </details> ## Image - [Android] Fix Share.RequestAsync SecurityException on Android 10+ caused by missing ClipData by @HarishwaranVijayakumar in #34417 <details> <summary>🔧 Fixes</summary> - [[Bug] Share.RequestAsync throws java.lang.SecurityException (uid=1000) on Android 10+ due to missing intent.ClipData](#34370) </details> - [Windows]Fixed the MauiImage with logical name containing path issue by @sheiksyedm in #32864 <details> <summary>🔧 Fixes</summary> - [MauiImage with LogicalName containing path - is not working on Windows](#32356) </details> - [Android, Windows & iOS] Fix Downsize/ScaleImage to maintain aspect ratio and prevent upscaling by @SyedAbdulAzeemSF4852 in #30808 <details> <summary>🔧 Fixes</summary> - [[Android & Windows] In GraphicsView, the aspect ratio is not maintained when Downsize is called with both maxWidth and maxHeight](#30803) </details> ## Label - [iOS , macOS] Fixed Label text cropping when a width request is specified on the label inside a VerticalStackLayout with specified width request by @NanthiniMahalingam in #29166 <details> <summary>🔧 Fixes</summary> - [Label text gets cropped when a width request is specified on the label inside a VerticalStackLayout](#28660) - [[iOS] Label with a fixed WidthRequest has wrong height](#26644) </details> - [Android] Fix Label word wrapping clips text depending on alignment and layout options by @Dhivya-SF4094 in #34533 <details> <summary>🔧 Fixes</summary> - [Bug: Android Label word wrapping clips text depending on alignment and layout options](#34459) </details> - LineHeight and decorations for HTML Label - fix by @kubaflo in #31202 <details> <summary>🔧 Fixes</summary> - [LineHeight with HTML Label not working](#22193) - [lineheight is broken ](#22197) </details> - [iOS] Fix Label with TailTruncation not rendering after empty-to-non-empty text transition by @kubaflo in #34812 <details> <summary>🔧 Fixes</summary> - [Label with LineBreakMode="TailTruncation" does not render text if initial Text is null or empty on first render (iOS)](#34591) </details> ## Layout - [Android] Fix overflowing children clipped when parent Opacity < 1 by @SyedAbdulAzeemSF4852 in #34565 <details> <summary>🔧 Fixes</summary> - [Maui Android parent view inappropriately creates clipping mask when its opacity is less than 1, cropping out children](#22038) </details> - Fixed the FlexLayout reverse issue with the AlignContent by @Ahamed-Ali in #32134 <details> <summary>🔧 Fixes</summary> - [FlexLayout alignment issue when Wrap is set to Reverse and AlignContent is set to SpaceAround, SpaceBetween or SpaceEvenly](#31565) </details> - [iOS/Mac] Fixed BoxView in AbsoluteLayout did not return to its default AutoSize for Height and Width after reset by @Dhivya-SF4094 in #31648 <details> <summary>🔧 Fixes</summary> - [[iOS, Catalyst] BoxView in AbsoluteLayout does not return to default AutoSize for Height/Width after reset](#31496) </details> ## Map - [Windows] Implement WinUI 3 MapControl handler using Azure Maps by @jfversluis in #34138 ## Modal - [Android] PopToRootAsync for modal pages - improvements by @kubaflo in #26851 <details> <summary>🔧 Fixes</summary> - [Shell PopToRootAsync doesn't happen instantly - previous pages flash quickly. Only happens in NET 9](#26846) </details> - [Android] Fix HideSoftInputOnTapped doesn't work on Modal Pages by @HarishwaranVijayakumar in #34770 <details> <summary>🔧 Fixes</summary> - [HideSoftInputOnTapped doesn't work on Modal Pages](#34730) </details> ## Navigation - [iOS] Alert popup may be displayed on wrong window when modal page navigation is in progress - fix by @kubaflo in #31016 <details> <summary>🔧 Fixes</summary> - [Alert popup may be displayed on wrong window when modal page navigation is in progress on iOS/MacOS](#30970) </details> - [Android] Page: Fix OnNavigatedTo called twice when NavigationPage is FlyoutPage Detail by @KarthikRajaKalaimani in #31931 <details> <summary>🔧 Fixes</summary> - [NavigationPage and FlyoutPage both call OnNavigatedTo, so it is called twice](#23902) </details> ## Picker - Fixed the Picker didn't dismiss it when tapping outside on iOS and MacCatalyst platform. by @KarthikRajaKalaimani in #30067 <details> <summary>🔧 Fixes</summary> - [[regression/8.0.3] iOS Picker dismiss does not work when clicking outside of the Picker](#19168) </details> - [Windows] Fixed Picker items width wont resize back by @SubhikshaSf4851 in #33042 <details> <summary>🔧 Fixes</summary> - [Picker items width won't resize back when its container window gets resized down.](#32984) </details> ## RadioButton - Fix TalkBack not correctly narrating RadioButtons with Content by @SubhikshaSf4851 in #34521 <details> <summary>🔧 Fixes</summary> - [[Android] TalkBack does not correctly narrate RadioButtons with Content](#34322) </details> ## SafeArea - [Android] Fix SafeAreaShouldWorkOnAllShellTabs test failure on API 36 by @praveenkumarkarunanithi in #34239 ## ScrollView - [iOS] Preserve ScrollView offsets when Orientation changes to Neither by @Vignesh-SF3580 in #34672 <details> <summary>🔧 Fixes</summary> - [Incorrect implementation of ScrollView.Orientation](#34583) </details> ## Searchbar - [Android] Fix SearchBar text bleeding between instances after navigation by @SyedAbdulAzeemSF4852 in #34703 <details> <summary>🔧 Fixes</summary> - [MAUI Android: SearchBar copies content from one to the other](#20348) </details> - Fixed SearchBar CursorPosition and SelectionLength not updating when typing by @Dhivya-SF4094 in #34347 <details> <summary>🔧 Fixes</summary> - [SearchBar - CursorPosition and SelectionLength are not updated when the user types](#30779) </details> ## SearchBar - [Windows] Fixed SearchHandler issues by @Tamilarasan-Paranthaman in #29520 <details> <summary>🔧 Fixes</summary> - [[Windows] SearchHandler APIs are not functioning properly](#29493) </details> ## Shell - [iOS, Mac] Fix for Background set to Transparent doesn't have the same behavior as BackgroundColor Transparent by @HarishwaranVijayakumar in #32245 <details> <summary>🔧 Fixes</summary> - [Background set to Transparent doesn't have the same behavior as BackgroundColor = Transparent](#22769) </details> - [iOS] Fix App crash with NullReferenceException in ShellSectionRenderer by @devanathan-vaithiyanathan in #32109 <details> <summary>🔧 Fixes</summary> - [[iOS] App crash with NullReferenceException in ShellSectionRenderer](#31961) </details> - [Android] Fixed back button icon selection logic in ShellToolbarTracker by @kubaflo in #32080 <details> <summary>🔧 Fixes</summary> - [IconOverride in Shell.BackButtonBehavior does not work.](#32050) </details> - Fix TabBarIsVisible Not Updating Dynamically When Set on ShellContent by @Vignesh-SF3580 in #33090 <details> <summary>🔧 Fixes</summary> - [Shell.TabBarIsVisible is not updated dynamically at runtime](#32994) </details> - [iOS, macOS] Shell: Fix RTL flow direction for flyout, menu cells, tab bar, and Locked flyout position by @NanthiniMahalingam in #32701 <details> <summary>🔧 Fixes</summary> - [[iOS, Mac Catalyst] Shell Flyout and Content Do Not Fully Support RightToLeft (RTL)](#32419) </details> - [IOS] Inconsistent Resize Behavior for Header/Footer - fix by @kubaflo in #28713 <details> <summary>🔧 Fixes</summary> - [[IOS, Mac] Inconsistent Resize Behavior for Header/Footer](#26397) - [Enable Shell Flyout Header/Footer resize tests on iOS/Catalyst](#33501) </details> - [Android] Fix for SearchHandler retaining previous page SearchView data in pages within Shell sections by @BagavathiPerumal in #29545 <details> <summary>🔧 Fixes</summary> - [[Shell][Android] The truth is out there...but not on top tab search handlers](#8716) </details> - [Android] Fix empty space above TabBar after navigating back when TabBar visibility is toggled by @praveenkumarkarunanithi in #34324 <details> <summary>🔧 Fixes</summary> - [Empty space appears above TabBar after navigating back when TabBar visibility is toggled](#33703) - [Grid with SafeAreaEdges=Container has incorrect size when tab bar appears](#34256) </details> ## SwipeView - [Android] SwipeView: Use MeasureSpecMode.Exactly for SwipeItem layout to fix text visibility by @Ahamed-Ali in #27399 <details> <summary>🔧 Fixes</summary> - [[Android] Right SwipeView items are not visible in the SwipeView.](#27367) </details> - [Android] Prevent the tap that closes an open SwipeView from being propagated to children by @sjordanGSS in #24275 <details> <summary>🔧 Fixes</summary> - [Tapping to close a SwipeView will activate TapGestureRecognizers on .Content](#23921) </details> ## Switch - [iOS & Mac] Fix for SearchHandler retains previous page state when switching top tabs by @BagavathiPerumal in #34735 <details> <summary>🔧 Fixes</summary> - [[Shell] [iOS & Mac] SearchHandler retains previous page state when switching top tabs](#34693) </details> ## TabbedPage - [Android] Fixed NullReferenceException in app with TabBar after returning from minimized state by @NirmalKumarYuvaraj in #34779 <details> <summary>🔧 Fixes</summary> - [NullReferenceException in app with TabBar after returning from minimized state](#34720) </details> ## Titlebar - Fixed BindingContext of the Window TitleBar is not being passed on to its child content. by @NirmalKumarYuvaraj in #30080 <details> <summary>🔧 Fixes</summary> - [The BindingContext of the Window TitleBar is not being passed on to its child content.](#24831) </details> - [Windows/Mac] Fix RTL FlowDirection causes overlap with native window control buttons in TitleBar by @devanathan-vaithiyanathan in #30400 <details> <summary>🔧 Fixes</summary> - [[Windows, Mac] RTL FlowDirection causes overlap with native window control buttons in TitleBar](#30399) </details> ## WebView - [Windows] Fix WebView background color not being applied by @SubhikshaSf4851 in #34599 <details> <summary>🔧 Fixes</summary> - [WebView background color has changed after update, can't override.](#34518) </details> - [Android] Fix for WebView/HybridWebView briefly flashes full screen before layout completes by @praveenkumarkarunanithi in #33207 <details> <summary>🔧 Fixes</summary> - [[Android] HybridWebView briefly resizes to full screen when page is opened before snapping back to correct size](#31475) </details> ## Xaml - Improved style inheritance by @kubaflo in #31317 <details> <summary>🔧 Fixes</summary> - [Styles based on a style that is based on another style that uses AppThemeBinding do not inherit properties correctly.](#31280) </details> - Fix for VisualStateManager Setter.TargetName failing when ControlTemplate is applied by @BagavathiPerumal in #33208 <details> <summary>🔧 Fixes</summary> - [Setter.TargetName + ControlTemplate crash](#26977) </details> <details> <summary>🧪 Testing (4)</summary> - [Testing] Additional Feature Matrix Event Test Cases for Slider and ScrollView by @nivetha-nagalingam in #34352 - [Testing] Fixed Build error on inflight/ candidate PR 34885 by @NafeelaNazhir in #34891 - [Testing] Fixed UI test image failure in PR 34885 - [13/4/2026] by @NafeelaNazhir in #34933 - Fixed test failure - CursorPositionUpdatesWhenSearchBarGainsFocus by @Dhivya-SF4094 in #34938 </details> <details> <summary>📦 Other (3)</summary> - Fix Loaded event not called for MAUI View added to native View by @NirmalKumarYuvaraj in #34345 <details> <summary>🔧 Fixes</summary> - [Loaded event not called for MAUI View added to native View](#34310) </details> - Add public IAlertManager and IAlertManagerSubscription interfaces by @Redth in #34228 <details> <summary>🔧 Fixes</summary> - [Alert/Dialog system (`DisplayAlert`, `DisplayActionSheet`, `DisplayPromptAsync`) needs a public extensibility point](#34104) </details> - Fix crash when displaying alerts on unloaded pages by @kubaflo in #33288 </details> <details> <summary>📝 Issue References</summary> Fixes #5825, Fixes #8494, Fixes #8716, Fixes #10987, Fixes #11404, Fixes #12008, Fixes #18200, Fixes #18551, Fixes #18657, Fixes #18701, Fixes #19168, Fixes #19209, Fixes #20062, Fixes #20348, Fixes #20834, Fixes #20991, Fixes #21983, Fixes #22038, Fixes #22193, Fixes #22197, Fixes #22769, Fixes #23330, Fixes #23854, Fixes #23902, Fixes #23921, Fixes #24304, Fixes #24831, Fixes #25124, Fixes #26059, Fixes #26397, Fixes #26644, Fixes #26846, Fixes #26961, Fixes #26977, Fixes #27086, Fixes #27367, Fixes #27959, Fixes #28337, Fixes #28351, Fixes #28660, Fixes #28975, Fixes #29390, Fixes #29391, Fixes #29463, Fixes #29493, Fixes #29544, Fixes #30052, Fixes #30065, Fixes #30071, Fixes #30144, Fixes #30399, Fixes #30779, Fixes #30803, Fixes #30970, Fixes #31280, Fixes #31446, Fixes #31475, Fixes #31496, Fixes #31565, Fixes #31825, Fixes #31961, Fixes #32048, Fixes #32050, Fixes #32139, Fixes #32356, Fixes #32419, Fixes #32771, Fixes #32944, Fixes #32984, Fixes #32994, Fixes #33308, Fixes #33501, Fixes #33703, Fixes #33770, Fixes #33773, Fixes #34104, Fixes #34256, Fixes #34257, Fixes #34310, Fixes #34322, Fixes #34363, Fixes #34370, Fixes #34459, Fixes #34518, Fixes #34583, Fixes #34591, Fixes #34666, Fixes #34693, Fixes #34720, Fixes #34730 </details> **Full Changelog**: main...inflight/candidate
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Issue Details
Root Cause of the issue
Description of Change
Mac Catalyst support for screen-on functionality:
DeviceDisplayImplementationto use IOKit assertions for managing the "Keep Screen On" feature on Mac Catalyst, instead of modifyingIdleTimerDisabledas on iOS.IOKitclass with P/Invoke wrappers forIOPMAssertionCreateWithNameandIOPMAssertionRelease, enabling assertion management for display sleep prevention on Mac Catalyst.Dependency and import updates:
System.Runtime.InteropServicesandCoreFoundationimports to support native interop required for IOKit assertion management.Issues Fixed
Fixes #26059
Tested the behaviour in the following platforms