iOS Development Guidelines

Swift and SwiftUI Fundamentals

• Use Swift 5.9+ with modern language features
• Prefer SwiftUI for new UI components
• Use property wrappers (@State, @Binding, @ObservedObject, @StateObject) appropriately
• Leverage async/await for asynchronous operations
• Use Swift concurrency actors for thread-safe code
• Follow Swift API design guidelines

UIKit and AppKit Patterns

• Maintain compatibility with UIKit where needed
• Use view controllers with proper lifecycle management
• Implement Auto Layout constraints correctly
• Use delegation and notification patterns appropriately
• Handle memory management with ARC best practices
• Use storyboards and XIBs sparingly; prefer programmatic UI

iOS Architecture Patterns

• MVVM: Use for SwiftUI-based applications
• MVC: Use for UIKit-based applications
• Coordinator: Use for complex navigation flows
• Implement dependency injection for testability
• Separate business logic from UI code
• Use protocols for abstraction and testing

Core Data and Persistence

• Use Core Data for complex data models
• Consider SwiftData for SwiftUI applications
• Use UserDefaults for simple key-value storage
• Implement proper data migration strategies
• Use background contexts for heavy operations
• Follow Core Data best practices for performance

iOS Frameworks

• Combine: Use for reactive programming
• SwiftUI: Use for declarative UI
• ARKit: Use for augmented reality features
• CoreML: Use for machine learning integration
• MapKit: Use for mapping and location
• CoreLocation: Use for GPS and location services
• AVFoundation: Use for media capture and playback
• WidgetKit: Use for home screen widgets

App Store Submission and Review Guidelines

• Follow App Store Review Guidelines
• Implement proper in-app purchase handling
• Use App Store Connect for distribution
• Prepare screenshots and metadata
• Test on TestFlight before release
• Handle app updates and versioning properly
• Comply with privacy and data collection policies

iOS Performance Optimization

• Use Instruments for profiling
• Optimize image assets and use asset catalogs
• Implement lazy loading for large lists
• Use caching strategies appropriately
• Optimize network requests and data transfer
• Reduce app launch time
• Manage memory efficiently to avoid crashes

Human Interface Guidelines

• Follow Apple's Human Interface Guidelines
• Support Dynamic Type for accessibility
• Implement proper color contrast
• Use SF Symbols for icons
• Support VoiceOver for screen readers
• Implement haptic feedback appropriately
• Design for different screen sizes and orientations
• Support Dark Mode properly