我正在尝试从AppDelegate构建我的主菜单，我已经断开了我的故事板文件，我正在使用一个main. swift文件加载我的应用程序作为@main我尝试了这个代码来构建我的菜单，但它不工作，该函数不创建我的项目，我也没有得到任何错误或问题，我认为创建的菜单不能插入到我的应用程序。
我的主. swift文件：

import Cocoa

// 1
let app = NSApplication.shared
let delegate = AppDelegate()
app.delegate = delegate

// 2
_ = NSApplicationMain(CommandLine.argc, CommandLine.unsafeArgv)

import Cocoa
import SwiftUI

class AppDelegate: NSObject, NSApplicationDelegate {

    private var window: NSWindow!

    func applicationDidFinishLaunching(_ aNotification: Notification) {

        window = NSWindow(
            contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
            styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
            backing: .buffered, defer: false)
        
        window.center()
        window.setFrameAutosaveName("Main Window")
        window.title = "No Storyboard Window"
        window.contentView = NSHostingView(rootView: ContentView())
        window.makeKeyAndOrderFront(nil)
        
        customMainMenu()
 
    }
    
    
    func customMainMenu() {
        
        if let appMainMenu = NSApp.mainMenu {
            
            let mainMenu = NSMenuItem()
            mainMenu.submenu = NSMenu(title: "MainMenu")

            let mainMenuItem1 = NSMenuItem(title: "Close", action: #selector(NSWindow.performClose(_:)), keyEquivalent: "w")
            mainMenuItem1.keyEquivalentModifierMask = .command

            let mainMenuItem2 = NSMenuItem(title: "Quit", action: #selector(NSApplication.shared.terminate(_:)), keyEquivalent: "q")
            mainMenuItem2.keyEquivalentModifierMask = .command
            

            mainMenu.submenu?.items = [mainMenuItem1, mainMenuItem2]
            appMainMenu.items = [mainMenu]
            
        }
    }
 
}