apple-platforms

# Apple Platform Development

## macOS Specifics

```swift
@main
struct MacApp: App {
    var body: some Scene {
        // Main window
        WindowGroup {
            ContentView()
        }
        .windowStyle(.hiddenTitleBar)
        .windowToolbarStyle(.unified(showsTitle: true))
        .defaultSize(width: 900, height: 600)
        .commands {
            CommandGroup(replacing: .newItem) {
                Button("New Document") { }
                    .keyboardShortcut("n", modifiers: .command)
            }
            ToolbarCommands()
        }

        // Menu bar app
        MenuBarExtra("Status", systemImage: "star.fill") {
            Button("Preferences...") { openSettings() }
            Divider()
            Button("Quit") { NSApp.terminate(nil) }
        }
        .menuBarExtraStyle(.window)

        // Settings window
        Settings {
            SettingsView()
        }
    }
}
```

## iPadOS Adaptive Layouts

```swift
struct AdaptiveView: View {
    @Environment(\.horizontalSizeClass) var sizeClass

    var body: some View {
        if sizeClass == .compact {
            // iPhone or iPad slide-over
            TabView {
                HomeTab()
                SearchTab()
            }
        } else {
            // iPad full screen
            NavigationSplitView {
                Sidebar()
            } detail: {
                DetailView()
            }
        }
    }
}

// Keyboard shortcuts for iPad
struct ContentView: View {
    var body: some View {
        List { }
            .keyboardShortcut("f", modifiers: .command)
            .focusable()
    }
}
```

## watchOS

```swift
@main
struct WatchApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

// Workout tracking
class WorkoutManager: NSObject, ObservableObject {
    private var session: HKWorkoutSession?
    private var builder: HKLiveWorkoutBuilder?
    @Published var heartRate: Double = 0

    func startWorkout(type: HKW