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[iOS] Fix for Transparent Background Color not applied to WebView #28804

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Merged
merged 5 commits into from
Apr 9, 2025
Merged

[iOS] Fix for Transparent Background Color not applied to WebView #28804

merged 5 commits into from
Apr 9, 2025

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Tamilarasan-Paranthaman
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Root Cause of the issue

  • On iOS, the WebView is fully opaque by default. As a result, transparency settings are not applied, and any attempt to set a transparent background has no visible effect.

Description of Change

  • To resolve this, I set the opaque property of the WebView to false when a non-null background is provided. This allows the transparency to take effect as intended.

Issues Fixed

Fixes #28714

Tested the behaviour in the following platforms

  • iOS
  • Android
  • Windows
  • Mac

Screenshot

Before Fix After Fix
Before-Fix-Gif.mov
After-Fix-Gif.mov
Before-Fix.mov
After-Fix.mov

@dotnet-policy-service dotnet-policy-service bot added community ✨ Community Contribution partner/syncfusion Issues / PR's with Syncfusion collaboration labels Apr 4, 2025
@Tamilarasan-Paranthaman Tamilarasan-Paranthaman marked this pull request as ready for review April 7, 2025 05:03
@Copilot Copilot AI review requested due to automatic review settings April 7, 2025 05:03
@Tamilarasan-Paranthaman Tamilarasan-Paranthaman requested a review from a team as a code owner April 7, 2025 05:03
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Copilot AI reviewed Apr 7, 2025
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Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

src/Controls/tests/TestCases.HostApp/Issues/Issue28714.cs
var button = new Button
{
Text = "Change WebView BackgroundColor",
AutomationId = "button"
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Copilot AI Apr 7, 2025

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The AutomationId 'button' is quite generic and may not be unique across the app; consider using a more descriptive and unique identifier (e.g., 'Issue28714ChangeBackgroundButton') to prevent potential clashes in UI testing.

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@jsuarezruiz
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/azp run

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Azure Pipelines successfully started running 3 pipeline(s).

@rmarinho
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rmarinho commented Apr 7, 2025

/azp run

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Azure Pipelines successfully started running 3 pipeline(s).

@jsuarezruiz
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Failing UITest on Android, HeaderFooterGridHorizontalWorks, is not related with the changes.

@rmarinho rmarinho added this to the .NET 9 SR6 milestone Apr 9, 2025
@rmarinho rmarinho merged commit 89946dd into dotnet:main Apr 9, 2025
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Copilot code review Copilot Copilot left review comments

@rmarinho rmarinho rmarinho approved these changes

@jsuarezruiz jsuarezruiz jsuarezruiz approved these changes

@mattleibow mattleibow Awaiting requested review from mattleibow mattleibow is a code owner automatically assigned from dotnet/dotnet-maui-reviewers

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area-controls-webview WebView community ✨ Community Contribution partner/syncfusion Issues / PR's with Syncfusion collaboration platform/ios
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.NET 9 SR6
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Successfully merging this pull request may close these issues.

Issue with GIF Image on iOS – Transparent GIF Background Displays as White
3 participants
@Tamilarasan-Paranthaman @jsuarezruiz @rmarinho