func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    // create viewController code...

    let slideMenuController = SlideMenuController(mainViewController: mainViewController, leftMenuViewController: leftViewController, rightMenuViewController: rightViewController)
    self.window?.rootViewController = slideMenuController
    self.window?.makeKeyAndVisible()    

    return true
}

class ContainerViewController: SlideMenuController {

    override func awakeFromNib() {
        if let controller = self.storyboard?.instantiateViewControllerWithIdentifier("Main") {
            self.mainViewController = controller
        }
        if let controller = self.storyboard?.instantiateViewControllerWithIdentifier("Left") {
            self.leftViewController = controller
        }
        super.awakeFromNib()
    }

}

SlideMenuOptions.leftViewWidth = 50
SlideMenuOptions.contentViewScale = .50
...

self.slideMenuController()?

if let slideMenuController = self.slideMenuController() {
    // some code
}

viewController.addLeftBarButtonWithImage(UIImage(named: "hoge")!)
viewController.addRightBarButtonWithImage(UIImage(named: "fuga")!)

// Open
self.slideMenuController()?.openLeft()
self.slideMenuController()?.openRight()

// close
self.slideMenuController()?.closeLeft()
self.slideMenuController()?.closeRight()

func leftWillOpen()
func leftDidOpen()
func leftWillClose()
func leftDidClose()
func rightWillOpen()
func rightDidOpen()
func rightWillClose()
func rightDidClose()