Navigation

Navigation Patterns (macOS)

NavigationSplitView (primary navigation)

NavigationSplitView {
    List(categories, selection: $selectedCategory) { category in
        Label(category.name, systemImage: category.icon)
    }
    .navigationSplitViewColumnWidth(min: 180, ideal: 220)
} detail: {
    if let category = selectedCategory {
        CategoryDetailView(category: category)
    } else {
        ContentUnavailableView("Select a Category", systemImage: "sidebar.left")
    }
}
.navigationSplitViewStyle(.balanced)

Three-Column Layout

NavigationSplitView {
    SidebarView(selection: $selectedGroup)
        .navigationSplitViewColumnWidth(min: 180, ideal: 220)
} content: {
    ContentListView(group: selectedGroup, selection: $selectedItem)
        .navigationSplitViewColumnWidth(min: 250, ideal: 300)
} detail: {
    DetailView(item: selectedItem)
}

WindowGroup (main window)

Users can open multiple instances:

@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
        .defaultSize(width: 900, height: 600)
    }
}

Window (single utility window)

Window("Activity Monitor", id: "activity") {
    ActivityView()
}
.defaultSize(width: 400, height: 300)

Settings Scene

Auto-wired to Cmd+, menu:

@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup { ContentView() }
        Settings { SettingsView() }
    }
}

MenuBarExtra (menu bar apps)

@main
struct MyApp: App {
    var body: some Scene {
        MenuBarExtra("Status", systemImage: "circle.fill") {
            StatusMenuView()
        }
        .menuBarExtraStyle(.window)
    }
}

Opening / Dismissing Windows

@Environment(\.openWindow) var openWindow
@Environment(\.dismissWindow) var dismissWindow

Button("Open Monitor") {
    openWindow(id: "activity")
}

NavigationStack (within detail views)

NavigationStack {
    List(items) { item in
        NavigationLink(value: item) {
            ItemRow(item: item)
        }
    }
    .navigationTitle("Items")
    .navigationDestination(for: Item.self) { item in
        ItemDetailView(item: item)
    }
}

TabView (sidebar tabs)

TabView {
    Tab("Library", systemImage: "books.vertical") {
        LibraryView()
    }
    Tab("Search", systemImage: "magnifyingglass") {
        SearchView()
    }
    Tab("Settings", systemImage: "gear") {
        SettingsView()
    }
}
.tabViewStyle(.sidebarAdaptable)

CommandMenu (system menu bar)

CommandMenu closures run outside the view hierarchy — use @FocusedValue to wire them to view state.

@main
struct MyApp: App {
    @FocusedValue(\.activeItems) private var items

    var body: some Scene {
        WindowGroup { ContentView() }

        CommandMenu("Items") {
            Button("New Item") { items?.create() }
                .keyboardShortcut("n", modifiers: .command)
                .disabled(items == nil)
            Button("Delete Item") { items?.deleteSelected() }
                .keyboardShortcut(.delete, modifiers: .command)
                .disabled(items == nil)
        }

        CommandGroup(replacing: .newItem) {
            Button("New Document") { items?.create() }
                .keyboardShortcut("n", modifiers: .command)
                .disabled(items == nil)
        }
    }
}
// In the active view: .focusedValue(\.activeItems, viewModel) to publish state
// FocusedValues key: extension FocusedValues { @Entry var activeItems: ItemsViewModel? }

Sheet Presentation

.sheet(isPresented: $showEditor) {
    EditorView()
        .frame(minWidth: 400, minHeight: 300)
}

NOT Available on macOS

• No fullScreenCover — use .sheet or open a new Window
• No swipe-back navigation — users use toolbar back buttons or Cmd+[
• No UINavigationController — SwiftUI only
• No tab bar at bottom — use sidebar or top-level TabView

Rules

1. Use NavigationSplitView as primary navigation (2 or 3 columns)
2. Use WindowGroup for main window, Window(id:) for utility windows
3. Use Settings scene for preferences (auto-wires Cmd+,)
4. Use MenuBarExtra for menu bar apps
5. Use openWindow(id:) / dismissWindow(id:) for window management
6. Use .tabViewStyle(.sidebarAdaptable) for sidebar tabs
7. Use CommandMenu / CommandGroup for system menu bar customization
8. Always provide .presentationDetents or frame constraints on .sheet