[iOS, Android] Fix for CollectionView IsEnabled=false allows touch interactions

[praveenkumarkarunanithi]

Root Cause

iOS
The underlying UICollectionView does not inherit from UIControl, so it has no native Enabled property. In ViewExtensions.UpdateIsEnabled, this caused an early return for non-UIControl views, leaving touch interactions active when IsEnabled = false.

Android
RecyclerView does not support a native enabled/disabled state. While UpdateIsEnabled is called when IsEnabled = false, there was no platform-specific handling, so touch interactions remained functional.

Description of Change

iOS
Modified ViewExtensions.UpdateIsEnabled to branch between UIControl and non-UIControl views. For UIControl, the native Enabled property is applied to block interactions and provide visual feedback. For non-UIControl views such as UICollectionView, UserInteractionEnabled is set to disable touch input while preserving visual appearance.

Android
Enhanced MauiRecyclerView with touch event overrides to handle the disabled state. OnInterceptTouchEvent returns true when the CollectionView is disabled, blocking child interactions. OnTouchEvent returns false to prevent RecyclerView itself from processing gestures. Both methods check ItemsView?.IsEnabled to ensure correct state handling.

Issues Fixed

Fixes #19771

Tested the behaviour in the following platforms

• Android
• Windows
• iOS
• Mac

Output Video

Before Issue Fix	After Issue Fix
BeforeFix.mov	afterfix.mov

[Copilot]

Pull Request Overview

This PR fixes a bug where CollectionView with IsEnabled=false still allowed touch interactions on iOS and Android platforms. The root cause was that the underlying native views (UICollectionView on iOS and RecyclerView on Android) don't have built-in disabled state handling like typical UI controls.

Key changes:

• Updated iOS ViewExtensions.UpdateIsEnabled to handle non-UIControl views by disabling UserInteractionEnabled
• Enhanced Android MauiRecyclerView with touch event overrides to block interactions when disabled
• Added comprehensive UI tests to validate the fix across platforms

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Core/src/Platform/iOS/ViewExtensions.cs	Modified to handle UICollectionView disabled state by setting UserInteractionEnabled
src/Controls/src/Core/Handlers/Items/Android/MauiRecyclerView.cs	Added touch event overrides to block interactions when IsEnabled is false
src/Controls/src/Core/PublicAPI/net-android/PublicAPI.Unshipped.txt	Updated public API surface with new touch event override methods
src/Controls/tests/TestCases.HostApp/Issues/Issue19771.cs	Added test UI page demonstrating CollectionView disabled state behavior
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue19771.cs	Added automated test validating touch interactions are blocked when disabled

[dotnet-policy-service]

Hey there @@praveenkumarkarunanithi! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[jsuarezruiz]

/azp run MAUI-UITests-public

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 31403

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 31403"

[rmarinho]

🤖 AI Summary

📊 Expand Full Review

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🔍 Pre-Flight — Context & Validation

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📝 Review Session — test case updated · 61a5b56

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Issue: #19771 - More issues with CollectionView IsEnabled, InputTransparent, Opacity via Styles and code behind
PR: #31403 - [iOS, Android] Fix for CollectionView IsEnabled=false allows touch interactions
Platforms Affected: iOS, Android, macOS
Files Changed: 3 implementation files, 2 test files

Key Findings

Root Cause (per PR):

• iOS: UICollectionView doesn't inherit from UIControl, so ViewExtensions.UpdateIsEnabled returned early for non-UIControl views, leaving touch interactions active when IsEnabled=false
• Android: RecyclerView has no native enabled/disabled state; UpdateIsEnabled was called but had no platform-specific handling, so touch interactions remained functional

Issue Description:

• User reported CollectionView with IsEnabled=false still allows touch interactions (items can be selected)
• Workarounds using InputTransparent and Opacity had inconsistent behavior depending on whether set via styles, code-behind, or VisualStates

PR's Approach:

• iOS: Modified ViewExtensions.UpdateIsEnabled to branch between UIControl and non-UIControl views. For non-UIControl views (like UICollectionView), sets UserInteractionEnabled to disable touch input
• Android: Enhanced MauiRecyclerView with touch event overrides (OnInterceptTouchEvent and OnTouchEvent) to block interactions when IsEnabled=false

Tests Included:

• UI test page: Issue19771.cs in TestCases.HostApp
• Automated test: Issue19771.cs in TestCases.Shared.Tests
• Test type: UI Tests (Appium-based)

PR Discussion

No reviewer disagreements or edge cases flagged in comments.

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
PR	PR #31403	iOS: Branch UpdateIsEnabled to handle non-UIControl views via UserInteractionEnabled; Android: Override OnInterceptTouchEvent/OnTouchEvent in MauiRecyclerView to block touch when disabled PASS (Gate)	ViewExtensions.cs (+10/-4), MauiRecyclerView.cs (+22), PublicAPI.Unshipped.txt (+2)	Original PR

Files Classification

Implementation files:

1. src/Core/src/Platform/iOS/ViewExtensions.cs - iOS fix
2. src/Controls/src/Core/Handlers/Items/Android/MauiRecyclerView.cs - Android fix
3. src/Controls/src/Core/PublicAPI/net-android/PublicAPI.Unshipped.txt - API surface update

Test files:

1. src/Controls/tests/TestCases.HostApp/Issues/Issue19771.cs - UI test page
2. src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue19771.cs - Automated test

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🚦 Gate — Test Verification

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📝 Review Session — test case updated · 61a5b56

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Result PASSED:
Platform: android
Mode: Full Verification

Test Behavior

• Tests FAIL without fix (bug is present)
• Tests PASS with fix (bug is fixed)

Verification Summary

              VERIFICATION PASSED                        
#

  Tests correctly detect the issue:                        
 FAIL without fix (bug is present)                    - 
 PASS with fix (bug is fixed)                         - 

Test Name: CollectionViewIsEnabledFalsePreventsInteractions
Device: Android emulator-5554
Test Count: 1 test validated

Conclusion

The tests properly validate the PR's fix. They catch the bug when the fix is not applied and pass when the fix is present.

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🔧 Fix — Analysis & Comparison

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📝 Review Session — test case updated · 61a5b56

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Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
1	try-fix (claude-sonnet-4.5)	ItemTouchListener FAIL	MauiRecyclerView.cs (+50)	Intercepted too late in event chain	interception
2	try-fix (claude-opus-4.6)	Adapter SelectableClicked guard PASS	SelectableItemsViewAdapter.cs (+6)	Blocks selection at MAUI logic layer - allows scrolling
3	try-fix (gpt-5.2)	Native Enabled/Clickable on RecyclerView and children PASS	MauiRecyclerView.cs (+~40)	Platform enabled-state plumbing
4	try-fix (gpt-5.2-codex)	Toggle SelectableViewHolder.Clicked subscriptions PASS	SelectableItemsViewAdapter.cs (+~30)	Detach click handlers when disabled
5	try-fix (gemini-3-pro-preview)	Override DispatchTouchEvent PASS	MauiRecyclerView.cs (+8)	Blocks at primary touch entry point
6	try-fix (gpt-5.2) Round 2	Guard SelectableViewHolder.OnClick PASS	SelectableViewHolder.cs (+16/-7)	Guards OnClick with Enabled checks
7	try-fix (gpt-5.2-codex) Round 2	Per-item OnTouchListener PASS	SelectableItemsViewAdapter.cs (+~20), SelectableViewHolder.cs (+~10)	Item-level touch consumption
8	try-fix (gemini-3-pro-preview) Round 2	Logical layer IsEnabled guards (Android + iOS PASS	SelectableItemsViewAdapter.cs (+5), SelectableItemsViewController.cs (+10)	Cross-platform selection guard	)
PR	PR #31403	iOS: UserInteractionEnabled for non-UIControl; Android: OnInterceptTouchEvent/OnTouchEvent overrides PASS (Gate)	ViewExtensions.cs (+10/-4), MauiRecyclerView.cs (+22), PublicAPI.Unshipped.txt (+2)	Original PR

Cross-Pollination Results

Round 2:

• claude-sonnet-4.5: Suggested OnTouchListener (acknowledged might be redundant)
• claude-opus-4.6: NO NEW IDEAS
  Attempt 6 PASS
  Attempt 7 PASS
  Attempt 8 PASS

Round 3:

• claude-sonnet-4.5: NO NEW IDEAS
• claude-opus-4.6: NO NEW IDEAS
• gpt-5.2: Suggested OnInterceptTouchEvent (PR's approach - not new)
• gpt-5.2-codex: NO NEW IDEAS
• gemini-3-pro-preview: NO NEW IDEAS

Exhausted: Yes - all models confirmed no new ideas in Round 3

Selection Reasoning

PR's fix blocks ALL touches (selection + scrolling), matching platform conventions for disabled controls. Simpler alternatives (Candidates #2, #8) allow scrolling while disabled, creating inconsistent UX.

Selected Fix: PR's fix - PR's OnInterceptTouchEvent/OnTouchEvent approach is the most robust, providing complete interaction blocking consistent with platform conventions and MAUI's IsEnabled semantics.

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📋 Report — Final Recommendation

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📝 Review Session — test case updated · 61a5b56

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Final Recommendation: APPROVE

Summary

PR #31403 successfully fixes CollectionView's IsEnabled=false bug on iOS and Android. The fix properly blocks touch interactions when disabled, passing all tests. 8 alternative approaches were the PR's approach was selected as the most robust, providing complete interaction blocking consistent with platform conventions.explored

Root Cause

iOS:
UICollectionView doesn't inherit from UIControl, causing ViewExtensions.UpdateIsEnabled to return early for non-UIControl views. This left touch interactions active even when IsEnabled=false.

Android:
RecyclerView lacks native enabled/disabled state handling. While UpdateIsEnabled was called, there was no platform-specific implementation to block touch interactions.

Fix Quality

PR's Approach:

• iOS: Branch UpdateIsEnabled to handle non-UIControl views via UserInteractionEnabled
• Android: Override OnInterceptTouchEvent (returns true to block children) and OnTouchEvent (returns false to prevent RecyclerView gesture processing)

Why this is the best approach:

1. Complete interaction blocking - Blocks ALL touches (selection + scrolling), matching platform conventions for disabled controls
2. Architecturally correct - Touch interception is the proper layer for IsEnabled behavior
3. Consistent with MAUI - Other disabled controls block all interactions, not just selection
4. Robust - Handles all touch scenarios at the right layer

Alternative approaches explored (8 total):

• 7 passed tests; simpler approaches (Adapter guard, DispatchTouchEvent) allow scrolling while disabled, creating inconsistent UX
• PR's complete blocking matches user expectations for disabled controls

Code Review

** Strengths:**

• Clean, maintainable code with clear logic
• Proper null checking (ItemsView?.IsEnabled == false)
• Platform-specific implementations in correct files
• Public API surface correctly documented in PublicAPI.Unshipped.txt
• Comprehensive UI tests included with HostApp page and shared test

Verdict

APPROVE - This PR correctly fixes the reported issue with a robust, platform-appropriate solution. The implementation is clean, well-tested, and properly documented. The chosen approach (complete interaction blocking via touch event interception) is superior to simpler alternatives that would allow partial interactions on disabled controls.

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🔧 Try-Fix Analysis: ✅ 1 passed

✅ Fix 1

Check IsEnabled Before Processing Selection

The fix successfully prevents CollectionView from allowing touch interactions when IsEnabled=false. The approach intercepts selection at the logical/handler level:

Android: Added guard in SelectableClicked() that returns early if ItemsView?.IsEnabled == false.

iOS: Added guards in both FormsSelectItem() and FormsDeselectItem() that return early if disabled.

Why it worked:

• Selection logic is prevented from executing at the point where it matters
• The SelectionChanged event does not fire because selection state is never modified
• Simple null-check guards are easy to maintain and understand
• Works symmetrically across both iOS and Android platforms
• This approach is different from and more robust than the existing platform-level touch event suppression

📋 Expand PR Finalization Review

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Title: ✅ Good

Current: [iOS, Android] Fix for CollectionView IsEnabled=false allows touch interactions

Description: ✅ Good

Description needs updates. See details below.

✨ Suggested PR Description

[!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 from this PR and let us know in a comment if this change resolves your issue. Thank you!

Root Cause

iOS
UICollectionView does not inherit from UIControl, so it has no native Enabled property. In ViewExtensions.UpdateIsEnabled, non-UIControl views triggered an early return, leaving touch interactions fully active when IsEnabled = false.

Android
RecyclerView has no native enabled/disabled state. While UpdateIsEnabled was called when IsEnabled = false, there was no platform-specific handling to block touch events, so scrolling and item selection remained functional.

Description of Change

iOS (src/Core/src/Platform/iOS/ViewExtensions.cs)
Modified UpdateIsEnabled to branch between UIControl and non-UIControl views:

• For UIControl views: sets the native Enabled property (preserves visual feedback such as alpha changes)
• For non-UIControl views (e.g., UICollectionView): sets UserInteractionEnabled = false to block touch input

Note: This change affects all non-UIControl UIViews platform-wide, not just UICollectionView. This also applies to MacCatalyst since the iOS platform code is shared.

Android (src/Controls/src/Core/Handlers/Items/Android/MauiRecyclerView.cs)
Added touch event overrides to MauiRecyclerView to handle the disabled state:

• OnInterceptTouchEvent returns true when ItemsView.IsEnabled == false, blocking all child touch events (item selection, item click)
• OnTouchEvent returns false when disabled, preventing RecyclerView itself from processing gestures (scroll, fling)

Both methods delegate to the base implementation when the view is enabled.

Issues Fixed

Fixes #19771

Platforms Tested

• Android
• iOS
• Windows (no changes)
• Mac (MacCatalyst affected implicitly via iOS code path, not explicitly tested)

Code Review: ✅ Passed

Code Review: PR #31403

🟡 Suggestions

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1. iOS: ViewExtensions.UpdateIsEnabled — Change is broader than described

File: src/Core/src/Platform/iOS/ViewExtensions.cs

Problem:
The fix sets UserInteractionEnabled = view.IsEnabled for all non-UIControl UIViews, not just UICollectionView. The description says "non-UIControl views such as UICollectionView", but this will also affect any other MAUI control backed by a non-UIControl native view (e.g., WKWebView, MKMapView, custom views, etc.) that previously had no IsEnabled handling.

Previously these views silently returned (no-op). Now they will have UserInteractionEnabled toggled when IsEnabled changes.

This is likely the correct intended behavior — disabling interaction should work for all views — but it is a behavioral change for any non-UIControl UIView beyond UICollectionView. This broader impact should be acknowledged in the PR description.

Current code:

else
{
    // Non-UIControl views (like UICollectionView) only get interaction disable
    platformView.UserInteractionEnabled = view.IsEnabled;
}

Recommendation: The code logic is sound. Update the PR description to note this is a general fix for all non-UIControl views, not CollectionView-specific.

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2. iOS/MacCatalyst: Title and description omit MacCatalyst

File: src/Core/src/Platform/iOS/ViewExtensions.cs

Problem:
The Platform/iOS/ folder compiles for both iOS and MacCatalyst. The title [iOS, Android] and platform checklist don't mention MacCatalyst, even though it benefits from (and is affected by) the same fix.

Recommendation: Update title to [iOS, MacCatalyst, Android] or add a note in the description that MacCatalyst is also covered.

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3. Test: Mixed indentation (tabs vs spaces)

File: src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue19771.cs

Problem:
The test method mixes tabs and 4-space indentation. The MAUI codebase uses tabs.

    App.WaitForElement("Item 1");
    App.Tap("Item 1");
        App.WaitForElement("DisableButton");   // ← 4 extra spaces (not tabs)
        App.Tap("DisableButton");              // ← 4 extra spaces (not tabs)
        App.WaitForElement("Item 3");          // ← 4 extra spaces (not tabs)
    App.Tap("Item 3");

Recommendation: Normalize to tabs throughout the test method.

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4. Test: Missing newline at end of file

File: src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue19771.cs

Problem:
The file is missing a newline at end of file (No newline at end of file in the diff).

Recommendation: Add a trailing newline.

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5. Test: Scroll interaction not validated

File: src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue19771.cs

Problem:
The Android fix intercepts both OnInterceptTouchEvent (which blocks child taps AND scrolling) and OnTouchEvent (which blocks RecyclerView's own scroll/fling handling). However, the test only validates that item selection is blocked — it does not test that scrolling is also blocked when disabled.

Recommendation: Consider adding a scroll-then-verify test step, or at minimum document in a comment that the fix also blocks scrolling even though the test only validates selection.

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6. Test: No coverage for re-enabling

File: src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue19771.cs

Problem:
The test verifies that interactions are blocked when IsEnabled = false, but does not verify that interactions resume when IsEnabled is set back to true. Re-enabling is equally important behavior to validate.

Recommendation: Add a test case (or extend the existing test) that:

1. Disables the CollectionView
2. Verifies interaction is blocked
3. Re-enables the CollectionView
4. Verifies interaction works again

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✅ Looks Good

• Android touch interception pattern is correct — OnInterceptTouchEvent returning true + OnTouchEvent returning false is the standard Android idiom for fully blocking touch on a ViewGroup and its children.
• ItemsView?.IsEnabled == false null-safe check — correctly handles the case where ItemsView is null (e.g., view disconnected).
• PublicAPI.Unshipped.txt updated — the two new public override methods on MauiRecyclerView<TItemsView, TAdapter, TItemsViewSource> are correctly registered as unshipped public API.
• UI test structure is correct — Issue19771 HostApp page and test class follow project conventions; [Category(UITestCategories.CollectionView)] is appropriate.
• Test assertion logic is correct — tapping once while enabled (count = 1), disabling, tapping again (should be blocked), and asserting count is still 1 correctly validates the fix.

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[kubaflo]

Looks like it is correct:

Looking at platform conventions:

iOS: Disabled UIControl typically blocks ALL interactions including scrolling
Android: Disabled views typically block ALL interactions
MAUI: Other controls with IsEnabled=false block all interactions