我如何在可可中获取应用程序菜单

Question

如何获取应用程序菜单（Apple菜单旁边的菜单栏中的菜单）的NSMenu或NSMenuItem。 它似乎是自动创建的，并且与我通过NSApplication setMainMenu设置的NSMenu无关。

顺便说一句：我正在构建没有Xcode的完整应用程序，所以请不要使用InterfaceBuilder技巧。

PS：MacOSX 10.5

Answer 1

如果没有IB，则可以使用NSApplication的mainMenu访问菜单：

NSMenu *mainMenu = [[NSApplication sharedApplication] mainMenu];
NSMenu *appMenu = [[mainMenu itemAtIndex:0] submenu];

for (NSMenuItem *item in [appMenu itemArray]) {
    NSLog(@"%@", [item title]);
}

Answer 2

尽管这是5年历史的问题...我还是想分享如何实现。

根据我在OS X 10.11（El Capitan）和Xcode 7.1中的经验，复制该应用程序菜单并不难。 苹果似乎消除了所有奇怪的限制。

注意：此代码已针对Swift 3更新，仅在macOS Sierra（10.12.1）中进行了测试。

//
//  AppDelegate.swift
//  Editor6MainMenuUI2Testdrive
//
//  Created by Hoon H. on 2016/11/05.
//  Copyright © 2016 Eonil. All rights reserved.
//

import Cocoa

/// You SHOULD NOT use `@NSApplicationMain` 
/// to make your custom menu to work.
class AppDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ aNotification: Notification) {}
    func applicationWillTerminate(_ aNotification: Notification) {}
}

func makeMainMenu() -> NSMenu {
    let mainMenu            = NSMenu() // `title` really doesn't matter.
    let mainAppMenuItem     = NSMenuItem(title: "Application", action: nil, keyEquivalent: "") // `title` really doesn't matter.
    let mainFileMenuItem    = NSMenuItem(title: "File", action: nil, keyEquivalent: "")
    mainMenu.addItem(mainAppMenuItem)
    mainMenu.addItem(mainFileMenuItem)

    let appMenu             = NSMenu() // `title` really doesn't matter.
    mainAppMenuItem.submenu = appMenu

    let appServicesMenu     = NSMenu()
    NSApp.servicesMenu      = appServicesMenu

    appMenu.addItem(withTitle: "About Me", action: nil, keyEquivalent: "")
    appMenu.addItem(NSMenuItem.separator())
    appMenu.addItem(withTitle: "Preferences...", action: nil, keyEquivalent: ",")
    appMenu.addItem(NSMenuItem.separator())
    appMenu.addItem(withTitle: "Hide Me", action: #selector(NSApplication.hide(_:)), keyEquivalent: "h")
    appMenu.addItem({ () -> NSMenuItem in
        let m = NSMenuItem(title: "Hide Others", action: #selector(NSApplication.hideOtherApplications(_:)), keyEquivalent: "h")
        m.keyEquivalentModifierMask = [.command, .option]
        return m
        }())
    appMenu.addItem(withTitle: "Show All", action: #selector(NSApplication.unhideAllApplications(_:)), keyEquivalent: "")

    appMenu.addItem(NSMenuItem.separator())
    appMenu.addItem(withTitle: "Services", action: nil, keyEquivalent: "").submenu = appServicesMenu
    appMenu.addItem(NSMenuItem.separator())
    appMenu.addItem(withTitle: "Quit Me", action: #selector(NSApplication.terminate(_:)), keyEquivalent: "q")

    let fileMenu = NSMenu(title: "File")
    mainFileMenuItem.submenu = fileMenu
    fileMenu.addItem(withTitle: "New...", action: #selector(NSDocumentController.newDocument(_:)), keyEquivalent: "n")

    return mainMenu
}

let del = AppDelegate()
/// Setting main menu MUST be done before you setting app delegate.
/// I don't know why.
NSApplication.shared().mainMenu = makeMainMenu()
NSApplication.shared().delegate = del
NSApplication.shared().run()

无论如何，它不是自动生成的，我必须自己设置它们。 我不确定是否还有其他方法可以做到这一点。

您可以在此处下载工作示例。

Answer 3

Swift 5.0我的两分钱

private final func manageMenus(){
    let  mainMenu =  NSApplication.shared.mainMenu

    if let editMenu = mainMenu?.item(at: 1)?.submenu{
        for item in editMenu.items{
            print(item.title)
        }
    }
}

因此您也可以启用它：

....

  for item in editMenu.items{
       item.isEnabled = true
   }

Answer 4

制作没有Xcode或IB的Cocoa应用程序对我来说是自虐的，但对他自己来说却是受虐狂的...尝试这个： [[[NSApp mainMenu] itemAtIndex: 0] submenu] 。