SwiftUI macOS主菜单

• Xcode 14.0以上版本，macOS蒙特里12.5.1*

要从主菜单中删除所有五个默认菜单项，请使用以下方法：

import SwiftUI

class AppDelegate: NSObject, NSApplicationDelegate {
            
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        
        let menus = ["File","Edit","View","Window","Help"]
        
        menus.forEach { menu in
            NSApp.mainMenu?.item(withTitle: menu).map {
                NSApp.mainMenu?.removeItem($0)
            }
        }
    }
}

然后将@NSApplicationDelegateAdaptor属性 Package 放入SwiftUI @main应用程序的结构中。若要生成自定义菜单项，请使用.commands {...}修饰符。

@main struct YourApp: App {
    
    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    
    var body: some Scene {

        WindowGroup {
            ContentView()
        }
        .commands {
            CommandMenu("Custom") {
                Button("Add Item", action: { } )
                    .keyboardShortcut("N")
                Divider()
                Button("Edit Item", action: { } )
                    .keyboardShortcut("E")
            }
        }
    }
}

或者，您可以将@NSApplicationDelegateAdaptor属性 Package 器放在ContentView结构中，而不是放在YourApp@main结构中。

@NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

我也调查过这个问题--这可能是swiftUI上的一个bug，它一直在破坏菜单。
总之--看看这条线：SwiftUI Update the mainMenu [SOLVED] kludgey
将它放在AppDelegate.applicationWillUpdate函数的DispatchQueue.main.async闭包中

import Foundation
import AppKit

public class AppDelegate: NSObject, NSApplicationDelegate {
    public func applicationWillUpdate(_ notification: Notification) {
        DispatchQueue.main.async {
            let currentMainMenu = NSApplication.shared.mainMenu

            //
            // Do your menu stuff here
            //
            // The below removes the Edit menu
            //

            let editMenu: NSMenuItem? = currentMainMenu?.item(withTitle: "Edit")
            if nil != editMenu {
                NSApp.mainMenu?.removeItem(editMenu!)
            }
        }
    }
}