swiftui-patterns

Topics in the source

• SwiftUI Patterns
• When to Activate
• State Management
• Property Wrapper Selection
• @Observable ViewModel
• View Consuming the ViewModel
• Environment Injection
• View Composition

Modern SwiftUI patterns for building declarative, performant user interfaces on Apple platforms. Covers the Observation framework, view composition, type-safe navigation, and performance optimization. Building SwiftUI views and managing state (@State, @Observable, @Binding) Designing navigation flows with NavigationStack Structuring view models and data flow Optimizing rendering performance for lists and complex layouts Working with environment values and dependency injection in SwiftUI Choose the simplest wrapper that fits: | Wrapper | Use Case | |---------|----------| | @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 | | @Environment | Shared dependencies injected via .environment() | Use @Observable (not ObservableObject) — it tracks property-level changes so SwiftUI only re-renders views that read the changed property: Replace @EnvironmentObject with @Environment: Break views into small, focused str

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