swift - 仅在 NSStatusBarButton 右键单击​​时显示 NSMenu？

Question

我有以下代码:(可以复制粘贴到新的 macOS 项目)

import Cocoa
import SwiftUI

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    var statusBarItem: NSStatusItem!

    func applicationDidFinishLaunching(_ aNotification: Notification) {

        let statusBar = NSStatusBar.system
        statusBarItem = statusBar.statusItem(
            withLength: NSStatusItem.squareLength)
        statusBarItem.button?.title = "🍎"

        // Setting action
        statusBarItem.button?.action = #selector(self.statusBarButtonClicked(sender:))
        statusBarItem.button?.sendAction(on: [.leftMouseUp])

        let statusBarMenu = NSMenu(title: "Status Bar Menu")
        statusBarMenu.addItem(
            withTitle: "Order an apple",
            action: #selector(AppDelegate.orderAnApple),
            keyEquivalent: "")

        statusBarMenu.addItem(
            withTitle: "Cancel apple order",
            action: #selector(AppDelegate.cancelAppleOrder),
            keyEquivalent: "")

        // Setting menu
        statusBarItem.menu = statusBarMenu
    }

    @objc func statusBarButtonClicked(sender: NSStatusBarButton) {
        let event = NSApp.currentEvent!

        if event.type ==  NSEvent.EventType.rightMouseUp {
            print("Right click!")
        } else {
            print("Left click!")
        }
    }

    @objc func orderAnApple() {
        print("Ordering a apple!")
    }


    @objc func cancelAppleOrder() {
        print("Canceling your order :(")
    }

}

实际行为:左键单击和右键单击都会打开菜单，不会触发 statusBarButtonClicked。
删除此行后:

statusBarItem.menu = statusBarMenu

statusBarButtonClicked 左键单击时触发，菜单未显示(如预期)

期望的行为:右键单击菜单打开，左键单击菜单不打开，操作被触发。
我如何实现它？

编辑

在 @red_menace 评论的帮助下，我成功实现了预期的行为:

import Cocoa
import SwiftUI

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    var statusBarItem: NSStatusItem!
    var menu: NSMenu!

    func applicationDidFinishLaunching(_ aNotification: Notification) {

        let statusBar = NSStatusBar.system
        statusBarItem = statusBar.statusItem(
            withLength: NSStatusItem.squareLength)
        statusBarItem.button?.title = "🍎"

        // Setting action
        statusBarItem.button?.action = #selector(self.statusBarButtonClicked(sender:))
        statusBarItem.button?.sendAction(on: [.leftMouseUp, .rightMouseUp])

        let statusBarMenu = NSMenu(title: "Status Bar Menu")
        statusBarMenu.addItem(
            withTitle: "Order an apple",
            action: #selector(AppDelegate.orderAnApple),
            keyEquivalent: "")

        statusBarMenu.addItem(
            withTitle: "Cancel apple order",
            action: #selector(AppDelegate.cancelAppleOrder),
            keyEquivalent: "")

        // Setting menu
        menu = statusBarMenu
    }

    @objc func statusBarButtonClicked(sender: NSStatusBarButton) {
        let event = NSApp.currentEvent!

        if event.type ==  NSEvent.EventType.rightMouseUp {
            statusBarItem.popUpMenu(menu)
        } else {
            print("Left click!")
        }
    }

    @objc func orderAnApple() {
        print("Ordering a apple!")
    }


    @objc func cancelAppleOrder() {
        print("Canceling your order :(")
    }

}

但是 Xcode 说 openMenu func 在 10.14 中已弃用，并告诉我改用菜单属性。有没有办法使用新的 API 实现所需的行为？

Answer 1

显示菜单的常用方法是将菜单分配给状态项，当单击状态项按钮时将显示菜单。由于 popUpMenu 已被弃用，因此需要另一种方式来在不同条件下显示菜单。如果您希望右键单击使用实际的状态项菜单，而不是仅在状态项位置显示上下文菜单，则可以将状态项菜单属性保留为 nil，直到您想要显示它为止。

我已经调整了您的代码，以将 statusBarItem 和 statusBarMenu 引用分开，仅将菜单添加到单击操作方法中的状态项。在操作方法中，添加菜单后，在状态按钮上执行正常单击即可删除菜单。由于单击按钮时状态项将始终显示其菜单，因此添加了 NSMenuDelegate 方法，以在菜单关闭时将菜单属性设置为 nil，从而恢复原操作:

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
    // keep status item and menu separate
    var statusBarItem: NSStatusItem!
    var statusBarMenu: NSMenu!

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        let statusBar = NSStatusBar.system
        statusBarItem = statusBar.statusItem(withLength: NSStatusItem.squareLength)
        statusBarItem.button?.title = "🍎"

        statusBarItem.button?.action = #selector(self.statusBarButtonClicked(sender:))
        statusBarItem.button?.sendAction(on: [.leftMouseUp, .rightMouseUp])

        statusBarMenu = NSMenu(title: "Status Bar Menu")
        statusBarMenu.delegate = self
        statusBarMenu.addItem(
            withTitle: "Order an apple",
            action: #selector(AppDelegate.orderAnApple),
            keyEquivalent: "")
        statusBarMenu.addItem(
            withTitle: "Cancel apple order",
            action: #selector(AppDelegate.cancelAppleOrder),
            keyEquivalent: "")
    }

    @objc func statusBarButtonClicked(sender: NSStatusBarButton) {
        let event = NSApp.currentEvent!
        if event.type ==  NSEvent.EventType.rightMouseUp {
            print("Right click!")
            statusBarItem.menu = statusBarMenu // add menu to button...
            statusBarItem.button?.performClick(nil) // ...and click
        } else {
            print("Left click!")
        }
    }

    @objc func menuDidClose(_ menu: NSMenu) {
        statusBarItem.menu = nil // remove menu so button works as before
    }

    @objc func orderAnApple() {
        print("Ordering a apple!")
    }

    @objc func cancelAppleOrder() {
        print("Canceling your order :(")
    }

}