swiftui-patterns

Modern SwiftUI patterns for building declarative, performant user interfaces on Apple platforms. Covers the Observation framework, view composition, type-safe navigation, and performance optimization.

| @State | View-local value types (toggles, form fields, sheet presentation) | | @Binding | Two-way reference to parent's @State | | @Observable class + @State | Owned model with multiple properties | | @Observable class (no wrapper) | Read-only reference passed from parent | | @Bindable | Two-way binding to an @Observable property |

Use @Observable (not ObservableObject) — it tracks property-level changes so SwiftUI only re-renders views that read the changed property:

SwiftUI アーキテクチャ パターン、@Observable による状態管理、ビューの構成、ナビゲーション、パフォーマンスの最適化、最新の iOS/macOS UI のベスト プラクティス。 ソース: affaan-m/everything-claude-code。