SwiftUI game orientation and home indicator setup

App.swift

import SwiftUI
import UIKit

@main
struct MyApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    var body: some Scene {
        WindowGroup {
            ContentView()
                .onDisappear {
                    // Use if want special orientation use only on this view
                    DispatchQueue.main.async {
                        UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue, forKey: "orientation")
                        UINavigationController.attemptRotationToDeviceOrientation()
                    }
                }
                .onAppear {
                    UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue, forKey: "orientation")
                    UINavigationController.attemptRotationToDeviceOrientation()
                }
        }
    }
}

class AppDelegate: NSObject, UIApplicationDelegate {
    static var orientationLock = UIInterfaceOrientationMask.landscape

    // Lock orientation to landscape only
    func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        return AppDelegate.orientationLock
    }
    
    // Apply custom scene delegate
    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
        let config = UISceneConfiguration(name: "Scene Delegate", sessionRole: connectingSceneSession.role)
        config.delegateClass = SceneDelegate.self
        return config
    }
}

// Custom SceneDelegate wrap ContentView inside custome HostingController
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
    var window: UIWindow?
    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            let rootView = ContentView()
            let hostingController = HostingController(rootView: rootView)
            window.rootViewController = hostingController
            self.window = window
            window.makeKeyAndVisible()
        }
    }
}

// Custom HostingController with home indicator settings to lock indicator after a short while, and require double swipe to exit the app
class HostingController: UIHostingController<ContentView> {
    override var prefersHomeIndicatorAutoHidden: Bool {
        return false
    }
    
    override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge {
        return .bottom
    }
}