useSpeaker3.swift

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!


    var mainWindowController: MainWindowController?
    
    func applicationDidFinishLaunching(aNotification: NSNotification) {
        // Create a window controller with a XIB file of the same name
        let mainWindowController = MainWindowController()
        
        // Put the window of the window controller on screen
        mainWindowController.showWindow( self)
        
        // Set the property to point to the window controller
        self.mainWindowController = mainWindowController
    }

}