检查菜单栏应用程序上的按键

Question

我正在编写一个使用 popover 的 MacOS 菜单栏应用程序。我依靠许多教程来完成工作。

很简单，代码如下所示：

class AppDelegate: NSObject, NSApplicationDelegate {
    var popover=NSPopover() 
    var statusBarItem: NSStatusItem!

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        //  Popover & Content View
            let contentView = ContentView()
            self.popover.contentViewController = NSHostingController(rootView: contentView)

        //  Menu
            self.statusBarItem = NSStatusBar.system.statusItem(withLength: 18)
            if let statusBarButton = self.statusBarItem.button {
                statusBarButton.title = "☰"
                statusBarButton.action = #selector(togglePopover(_:))               
            }
    }
    
    @objc func togglePopover(_ sender: AnyObject?) {
        let statusBarButton=self.statusBarItem.button!
        func show(_ sender: AnyObject) {
            self.popover.show(relativeTo: statusBarButton.bounds, of: statusBarButton, preferredEdge: NSRectEdge.maxY)
        }
        func hide(_ sender: AnyObject) {
            popover.performClose(sender)
        }
        self.popover.isShown ? hide(sender as AnyObject) : show(sender as AnyObject)
    }
}

如何检查单击菜单按钮时option键是否按下？

Answer 1

询问当前事件修饰符标志是否包含option

func isOptionkeyPressed() -> Bool
{
    return NSApp.currentEvent?.modifierFlags.contains(.option) == true
}