Fix Build

Fix Build Errors

Systematically diagnose and fix iOS build errors.

Workflow

1. Get Fresh Build Output

# Clean build to get all errors
xcodebuild clean build \
  -scheme MyApp \
  -destination 'platform=iOS Simulator,name=iPhone 15' \
  2>&1 | tee build_output.txt

2. Analyze Errors

Parse the build output for:

• Compilation errors (error:)
• Linker errors (ld:)
• Swift errors (Swift Compiler Error)
• Missing dependencies

3. Categorize Issues

Syntax Errors

• Missing brackets, semicolons
• Typos in code
• Invalid Swift syntax

Type Errors

• Type mismatch
• Missing protocol conformance
• Generic constraint violations

Import Errors

• Missing imports
• Circular dependencies
• Module not found

Concurrency Errors

• Sendable violations
• Actor isolation issues
• Data race warnings

Linker Errors

• Duplicate symbols
• Missing libraries
• Architecture mismatches

4. Fix Strategy

Think deeply about each error:

1. What is the root cause?
2. What is the minimal fix?
3. Are there related errors that will resolve together?

5. Implement Fixes

Fix one category at a time:

1. Fix import/module errors first
2. Fix type errors
3. Fix syntax errors
4. Fix concurrency errors
5. Rebuild after each category

6. Verify Fix

xcodebuild build \
  -scheme MyApp \
  -destination 'platform=iOS Simulator,name=iPhone 15'

Common Fixes

Missing Sendable Conformance

// Add @unchecked Sendable for legacy types
extension LegacyType: @unchecked Sendable {}

// Or make type properly Sendable
struct MyType: Sendable {
    let value: String  // All properties must be Sendable
}

Actor Isolation

// Add MainActor annotation
@MainActor
final class ViewModel { }

// Or use nonisolated for non-UI methods
nonisolated func computeValue() -> Int { }

Generic Constraints

// Add missing protocol conformance
struct Item: Identifiable, Hashable {
    let id: UUID
}