SwiftUI Expert Skill

SwiftUI Expert Skill

Overview

Use this skill to build, review, or improve SwiftUI features with correct state management, modern API usage, Swift concurrency best practices, optimal view composition, and iOS 26+ Liquid Glass styling. Prioritize native APIs, Apple design guidance, and performance-conscious patterns. This skill focuses on facts and best practices without enforcing specific architectural patterns.

When to Use This Skill

Use this skill when:

• Building new SwiftUI features
• Refactoring existing SwiftUI views
• Reviewing SwiftUI code quality
• Adopting modern SwiftUI patterns
• Working with SwiftUI state management
• Implementing iOS 26+ Liquid Glass styling

Workflow Decision Tree

1) Review existing SwiftUI code

• Check property wrapper usage against the selection guide (see references/state-management.md)
• Verify modern API usage (see references/modern-apis.md)
• Verify view composition follows extraction rules (see references/view-structure.md)
• Check performance patterns are applied (see references/performance-patterns.md)
• Verify list patterns use stable identity (see references/list-patterns.md)
• Inspect Liquid Glass usage for correctness and consistency (see references/liquid-glass.md)
• Validate iOS 26+ availability handling with sensible fallbacks

2) Improve existing SwiftUI code

• Audit state management for correct wrapper selection (prefer @Observable over ObservableObject)
• Replace deprecated APIs with modern equivalents (see references/modern-apis.md)
• Extract complex views into separate subviews (see references/view-structure.md)
• Refactor hot paths to minimize redundant state updates (see references/performance-patterns.md)
• Ensure ForEach uses stable identity (see references/list-patterns.md)
• Suggest image downsampling when UIImage(data:) is used (as optional optimization, see references/image-optimization.md)
• Adopt Liquid Glass only when explicitly requested by the user

3) Implement new SwiftUI feature

• Design data flow first: identify owned vs injected state (see references/state-management.md)
• Use modern APIs (no deprecated modifiers or patterns, see references/modern-apis.md)
• Use @Observable for shared state (with @MainActor if not using default actor isolation)
• Structure views for optimal diffing (extract subviews early, keep views small, see references/view-structure.md)