ios-developer_skill

Overview

This skill helps develop native iOS applications using Swift and SwiftUI, with pragmatic use of UIKit when required. It emphasizes modern concurrency, protocol-oriented design, MVVM architecture, and adherence to Apple’s Human Interface Guidelines. The focus includes networking, persistent storage, app lifecycle, and production-ready testing. Use it proactively for feature design, architecture decisions, and App Store readiness.

How this skill works

It generates Swift and SwiftUI source patterns: views, view models, and Combine/async data flows. It designs Core Data schemas and CloudKit sync strategies, plus networking layers with URLSession, JSON parsing, and error handling. It proposes app lifecycle management, background tasks, accessibility, and performance optimizations. It also recommends Xcode project setups, schemes, and testing strategies for unit and UI tests.

When to use it

• When building new native iOS apps with SwiftUI and Swift
• When integrating UIKit components into a SwiftUI app
• When designing Core Data models or CloudKit sync
• When implementing networking, JSON handling, and retry/error strategies
• When preparing UI/UX and app metadata for App Store submission
• When setting up CI, testing, and Xcode project configurations

Best practices

• Prefer SwiftUI-first designs and introduce UIKit only for unavailable native controls
• Use MVVM with protocol-driven interfaces and dependency injection
• Adopt async/await for network and I/O tasks; wrap legacy Combine where needed
• Model persistence with Core Data relationships and migration-aware schemas
• Follow iOS Human Interface Guidelines and add accessibility labels, traits, and Dynamic Type support
• Write unit tests for view models and integration UI tests for workflows

Example use cases

• scaffold a SwiftUI app with MVVM, async/await networking, and Core Data persistence
• design a networking layer with URLSession, Codable models, retry logic, and centralized error handling
• integrate a custom UIKit camera view into a SwiftUI flow with bridge adapters
• create CloudKit sync strategies and conflict resolution for offline-first data
• optimize app launch and background processing, including background fetch and silent push handling