SwiftUI Framework Guide

Applies to: SwiftUI 5.0+ (iOS 17+, macOS 14+, watchOS 10+, tvOS 17+, visionOS 1.0+) Language Guide: @.claude/skills/swift-guide/SKILL.md

Overview

SwiftUI is Apple's declarative UI framework for building native apps across all Apple platforms. It uses a reactive, data-driven approach where the UI automatically updates when state changes.

Use SwiftUI when:

• Building new Apple platform apps (iOS, macOS, watchOS, tvOS, visionOS)
• Cross-platform Apple development from a single codebase
• Declarative, reactive UI with minimal boilerplate
• Leveraging latest platform features (widgets, App Intents, Live Activities)

Consider alternatives when:

• Supporting iOS < 14 (use UIKit)
• Need fine-grained UIKit control (embed via UIViewRepresentable)
• Existing large UIKit codebase (migrate incrementally)