当所选函数移至其他class时，NSMENUITEM带有添加到NSSTATUSBAR中的动作呈灰色。

Question

如果作为 NSMenuItem 操作调用的函数不在 AppDelegate 中，菜单条目将显示为灰色。

我似乎无法弄清楚到底哪里出了问题...也许我在初始化 StatusBarItemController 时出错了？只要我将 printToTheWalls 移动到 AppDelegate class，它就会开始工作。

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    var statusBarItemController: StatusBarItemController?
    let statusBarItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application
        statusBarItemController = StatusBarItemController()
        if let button = statusBarItem.button {
            button.image = NSImage(named: NSImage.Name("trayIcon"))
        }
        statusBarItemController?.constructMenu(with: statusBarItem)
    }

    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }

}

import Cocoa

class StatusBarItemController {

    func constructMenu(with statusBarItem: NSStatusItem) {
        let menu = NSMenu()
        menu.addItem(NSMenuItem(
            title: "From the windows...",
            action: #selector(printToTheWalls(_:)),
            keyEquivalent: ""
        ))
        menu.addItem(NSMenuItem.separator())
        menu.addItem(NSMenuItem(
            title: "Quit",
            action: #selector(NSApplication.terminate(_:)),
            keyEquivalent: "q"
        ))

        statusBarItem.menu = menu
    }

    @objc func printToTheWalls(_ sender: NSMenuItem) {
        //This doesn't seem to be called and/or found
        print("To the Walls!")
    }
}

Answer 1

解决方案是手动将目标属性设置为 self 因为 @vadian 和 @red_menace 帮助我在问题的评论中发现。

工作代码如下所示：

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    var statusBarItemController: StatusBarItemController?

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // Insert code here to initialize your application
        statusBarItemController = StatusBarItemController()
    }

    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }

}

import Cocoa

class StatusBarItemController: NSObject {
    let statusBarItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)

    override init() {
        super.init()
        if let button = statusBarItem.button {
            button.image = NSImage(named: NSImage.Name("trayIcon"))
        }
        constructMenu()
    }

    func constructMenu() {
        if let button = statusBarItem.button {
            button.image = NSImage(named: NSImage.Name("trayIcon"))
        }
        let menu = NSMenu()

        let fromTheWindowsItem = NSMenuItem(
            title: "From the windows...",
            action: #selector(StatusBarItemController.printToTheWalls(_:)),
            keyEquivalent: ""
        )
        fromTheWindowsItem.target = self
        menu.addItem(fromTheWindowsItem)
        menu.addItem(NSMenuItem.separator())
        menu.addItem(NSMenuItem(
            title: "Quit",
            action: #selector(NSApplication.terminate(_:)),
            keyEquivalent: "q"
        ))

        statusBarItem.menu = menu
    }

    @objc func printToTheWalls(_ sender: NSMenuItem) {
        print("To the Walls!")
    }
}

当所选函数移至其他class时，NSMENUITEM带有添加到NSSTATUSBAR中的动作呈灰色。

NSMenuItem with action added to NSStatusBar is grayed out when the selected function is moved to other class

macos

cocoa

swift