fix(ios): retain Objective-C classes in Xcode builds

[mortenolsrud]

Description

Generated iOS Xcode projects link the Go c-archive without -ObjC. Because WailsAppDelegate is referenced by class name through UIApplicationMain, the linker can omit the archive member that contains the Objective-C class. The generated app can then crash at launch with:

No class named WailsAppDelegate is loaded.

This adds -ObjC to OTHER_LDFLAGS for both Debug and Release configurations in the generated Xcode project. $(inherited) is retained so project or environment linker flags continue to compose normally.

A regression test renders the project template and verifies that both build configurations independently contain the linker setting.

Fixes #5913.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• go test -count=1 ./internal/commands
• Rendered-project regression coverage for both Debug and Release.
• Reviewed the generated pbxproj syntax and linker behavior against the existing Go c-archive integration.

Honest caveat: the generated project was not launched on an iOS device or simulator from this Linux host.

• Windows
• macOS
• Linux

Test Configuration

• Go: go1.26.5
• OS: Ubuntu 24.04.4 LTS, amd64

Checklist:

• (v2 only) I have updated website/src/pages/changelog.mdx with details of this PR (v3 changelog entries are added automatically) — n/a (v3)
• My code follows the general coding style of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective
• New and existing unit tests pass locally with my changes

Summary by CodeRabbit

• Bug Fixes

  • Improved iOS builds to preserve existing linker settings and reliably include Objective-C classes.
  • Applied the linker configuration consistently to both Debug and Release builds.

• Tests

  • Added coverage to verify the iOS project configurations contain the expected linker settings without duplication.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: b2cd1901-7402-4df2-b460-c3f03b9c5ec1

📥 Commits

Reviewing files that changed from the base of the PR and between f80dad5 and 06e0efd.

📒 Files selected for processing (2)

• v3/internal/commands/ios_xcode_gen_test.go
• v3/internal/commands/updatable_build_assets/ios/project.pbxproj.tmpl

---

Walkthrough

The iOS Xcode project template now adds inherited linker flags and -ObjC to Debug and Release configurations. A test renders the template and verifies both configurations contain the expected linker flags exactly once.

Changes

iOS linker configuration

Layer / File(s)	Summary
Configure and validate Objective-C retention v3/internal/commands/updatable_build_assets/ios/project.pbxproj.tmpl, v3/internal/commands/ios_xcode_gen_test.go	Debug and Release configurations preserve inherited linker flags and add -ObjC. The test verifies each configuration contains one linker-flag block with both values.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: leaanthony

Poem

A rabbit checks the flags with care,
-ObjC now waits inside there.
Debug hops, Release follows,
Classes stay through linker shadows.
Xcode launches bright and fair.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the iOS Xcode linker fix and the retained Objective-C classes.
Description check	✅ Passed	The description covers the cause, fix, linked issue, testing, environment, caveat, and checklist status.
Linked Issues check	✅ Passed	The changes add -ObjC and preserve $(inherited) in both configurations, with tests covering the issue requirements.
Out of Scope Changes check	✅ Passed	The changes are limited to the iOS project template and its regression test, with no unrelated scope detected.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 golangci-lint (2.12.2)

level=error msg="[linters_context] typechecking error: pattern ./...: directory prefix . does not contain main module or its selected dependencies"

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