How can I push view controller? about lgsidemenucontroller HOT 1 CLOSED

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        tableView.deselectRowAtIndexPath(indexPath, animated: true)

        let mainViewController = UIApplication.sharedApplication().keyWindow?.rootViewController as! MainViewController
        let navigationController = mainViewController.rootViewController as! UINavigationController

        if indexPath.row == 0 {
            if !mainViewController.isLeftViewAlwaysVisible() {
                mainViewController.hideLeftViewAnimated(true, completionHandler: {
                    mainViewController.showRightViewAnimated(true, completionHandler: nil)
                })
            } else {
                mainViewController.showRightViewAnimated(true, completionHandler: nil)
            }
        } else {
            let viewController = UIViewController()
            viewController.view.backgroundColor = .whiteColor()
            viewController.title = "Test \(titlesArray[indexPath.row])"
            navigationController.pushViewController(viewController, animated: true)

            mainViewController.hideLeftViewAnimated(true, completionHandler: nil)
        }
    }