navigation

name	navigation
description	watchOS navigation: NavigationStack, vertical page TabView, sheets, alerts — no NavigationSplitView. Use when working on shared watchOS patterns related to navigation.

Navigation Patterns (watchOS)

Pattern Selection Guide

Pattern	When to Use
NavigationStack	Hierarchical drill-down (list → detail)
TabView vertical page	2-4 peer sections (swipe vertically)
.sheet(item:)	Quick input, secondary action
.alert / .confirmationDialog	Confirmation, destructive actions
.fullScreenCover	Immersive single-purpose experience

NavigationStack (Primary Pattern)

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

TabView — Vertical Page Style

watchOS uses vertical paging (swipe up/down), not horizontal tabs:

TabView {
    SummaryView()
    DetailView()
    SettingsView()
}
.tabViewStyle(.verticalPage)

For page indicators:

TabView {
    Page1()
    Page2()
    Page3()
}
.tabViewStyle(.verticalPage(transitionStyle: .blur))

Sheets

// Item-driven (preferred for existing items)
@State private var editingItem: Item?

.sheet(item: $editingItem) { item in
    EditItemView(item: item)
}

// Boolean-driven (for creation)
@State private var showAdd = false

.sheet(isPresented: $showAdd) {
    AddItemView()
}

Sheets on watchOS are full-screen — they slide up from the bottom.

Alerts

.alert("Delete?", isPresented: $showAlert) {
    Button("Delete", role: .destructive) { deleteItem() }
    Button("Cancel", role: .cancel) { }
} message: {
    Text("This cannot be undone.")
}

Confirmation Dialog

.confirmationDialog("Options", isPresented: $showDialog) {
    Button("Edit") { edit() }
    Button("Delete", role: .destructive) { delete() }
    Button("Cancel", role: .cancel) { }
}

Type-Safe Routing

enum Route: Hashable {
    case detail(Item)
    case settings
}

NavigationStack {
    List {
        NavigationLink("Settings", value: Route.settings)
    }
    .navigationDestination(for: Route.self) { route in
        switch route {
        case .detail(let item):
            ItemDetailView(item: item)
        case .settings:
            SettingsView()
        }
    }
}

NOT Available on watchOS

• No NavigationSplitView — watch is single-column only
• No horizontal TabView tabs — use .tabViewStyle(.verticalPage)
• No Tab("Label", systemImage:) API — use plain views inside TabView
• No .popover — use .sheet or .alert instead
• No .presentationDetents — sheets are always full-screen on watch
• No sidebar navigation

Navigation Rules

1. ALWAYS use NavigationStack for hierarchical flows — never NavigationSplitView
2. Use .tabViewStyle(.verticalPage) for peer sections — never horizontal tabs
3. Keep navigation depth shallow (2-3 levels max) — users glance briefly
4. Prefer List as the root of NavigationStack for consistent watch styling
5. Use .navigationTitle for context — watch shows it as a small header