ios-development_skill

Overview

This skill provides practical guidance for building iOS 17+ apps using SwiftUI, MVVM, SwiftData, and modern networking with Alamofire or Moya. It focuses on maintainable architecture, testable ViewModels, accessibility, and CI/CD automation to ship reliable apps. The content is hands-on and geared toward production-ready patterns and developer workflows.

How this skill works

It inspects common iOS development concerns and describes concrete implementations: project setup, SwiftUI state and navigation using iOS 17 features, MVVM with repository/data layers, SwiftData persistence, and networking with Moya/Alamofire. It also covers testing with XCTest, accessibility best practices, and CI/CD including fastlane and Xcode Cloud configurations. Each section includes minimal code examples, patterns, and a checklist for production readiness.

When to use it

• Start a new iOS 17+ SwiftUI app and choose modern patterns
• Implement or refactor MVVM with clear data and domain layers
• Add networking using Moya or Alamofire with type-safe targets
• Persist data using SwiftData for local models and migrations
• Write unit tests for ViewModels and network layers with XCTest
• Set up CI/CD pipelines with Xcode Cloud or fastlane for test and distribution

Best practices

• Set deployment target to iOS 17 and enable strict concurrency checks
• Use @Observable for ViewModels and @MainActor for UI-updating methods
• Separate Presentation, Domain, and Data layers with Repository pattern
• Prefer SwiftData for model persistence on iOS 17+, add modelContainer in App
• Add accessibility labels, hints, and support Dynamic Type and VoiceOver
• Write unit tests for critical business logic and avoid force unwraps

Example use cases

• Create a SwiftUI list backed by a UserListViewModel fetching from a Moya-based API
• Migrate a Core Data stack to SwiftData and expose models to SwiftUI views
• Add automated unit and UI tests run by Xcode Cloud on pull requests
• Implement an offline-first repository that caches API responses in SwiftData
• Configure fastlane lanes for CI test runs and TestFlight beta distribution