Menu Bar Apps

menuBarApps.swift

//strong reference to retain the status bar item object
var statusItem: NSStatusItem?

func applicationDidFinishLaunching(_ aNotification: Notification) {
   statusItem = NSStatusBar.system().statusItem(withLength: -1)  
   
   guard let button = statusItem?.button else {
       print("status bar item failed. Try removing some menu bar item.")
       NSApp.terminate(nil)
       return
   }
   
   button.image = NSImage(named: "MenuBarButton")
   button.target = self
   button.action = #selector(displayMenu)
}

menuBarApps2.swift

 @IBOutlet weak var appMenu: NSMenu!

 @objc func displayMenu() {
     guard let button = statusItem?.button else { return }
     let x = button.frame.origin.x
     let y = button.frame.origin.y - 5
     let location = button.superview!.convert(NSMakePoint(x, y), to: nil)
     let w = button.window!
     let event = NSEvent.mouseEvent(with: .leftMouseUp,
                                    location: location,
                                    modifierFlags: NSEvent.ModifierFlags(rawValue: 0),
                                    timestamp: 0,
                                    windowNumber: w.windowNumber,
                                    context: w.graphicsContext,
                                    eventNumber: 0,
                                    clickCount: 1,
                                    pressure: 0)!
     NSMenu.popUpContextMenu(appMenu, with: event, for: button)
 }