Core Idea

SwiftUI replaces the old UIKit lifecycle (AppDelegate, SceneDelegate) with a declarative entry point.

Entry Point

@main
struct AppetizersApp: App {
    var body: some Scene {
        WindowGroup {
            AppetizerTabView()
        }
    }
}

Key Concepts

1. App

• The starting point of your app
• Conforms to App protocol
• Replaces AppDelegate + SceneDelegate

2. Scene

• Represents a UI instance of your app
• Think: window or screen session
• iPad/macOS → multiple scenes possible

3. WindowGroup

WindowGroup {
    AppetizerTabView()
}

• A container that manages multiple windows of the same UI