如何在Xcode12的新SwiftUI应用生命周期中更改window.rootViewController？

import SwiftUI
import UIKit

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        // 在应用启动时进行一些初始化操作
        return true
    }
}

@main
struct YourApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
    // 创建一个新的根视图控制器
    let newRootViewController = YourNewRootViewController()
    
    // 获取应用的主窗口
    if let window = UIApplication.shared.windows.first {
        // 设置新的根视图控制器
        window.rootViewController = newRootViewController
    }
    
    return true
}