ios-dev

iOS Development Expert

Comprehensive guidance for iOS app development across multiple specialized areas.

When This Skill Activates

Use this skill when the user needs help with:

• Swift code quality and modern idioms
• SwiftUI component patterns
• Apple HIG compliance checks
• Accessibility assessment (VoiceOver, color contrast, Dynamic Type)
• Navigation architecture (NavigationStack, NavigationSplitView, TabView)
• App planning and architecture decisions

Available Modules

Coding Best Practices

Modern Swift patterns, architectural approaches, and code quality standards:

• Architecture: MVVM, Clean Architecture, The Composable Architecture (TCA)
• Swift idioms: value types, protocol-oriented programming, async/await, actors
• Performance: lazy loading, background processing, memory management
• Testing: XCTest, snapshot testing, UI testing

UI Review

Evaluate designs for HIG compliance:

• Typography: Dynamic Type support, custom fonts with scaling
• Accessibility: VoiceOver labels, color contrast (4.5:1 minimum), touch targets (44×44pt)
• Layout: Safe area handling, adaptivity across device sizes
• Components: Use of native controls vs. custom implementations

Navigation Patterns

NavigationStack (iOS 16+):

NavigationStack {
    ContentView()
        .navigationDestination(for: Item.self) { item in
            DetailView(item: item)
        }
}

NavigationSplitView (iPad/macOS):

NavigationSplitView {
    Sidebar()
} detail: {
    DetailView()
}

Programmatic navigation with NavigationPath:

@State private var path = NavigationPath()

NavigationStack(path: $path) {
    ContentView()
        .navigationDestination(for: Route.self) { route in
            // ...
        }
}

App Planner

Concept-to-architecture development:

1. Define core use cases (3–5 maximum for MVP)
2. Choose data persistence strategy (SwiftData, Core Data, CloudKit, UserDefaults)
3. Select networking approach (URLSession, async/await)
4. Plan state management (ObservableObject, @Observable, TCA)
5. Define navigation structure (tab-based, navigation stack, split view)