(self.presentedViewController as! tableViewController).table.reloadData()

(self.navigationController!.viewControllers[self.navigationController!.viewControllers.count - 2] as! tableViewController).table.reloadData()

extension Notification.Name {
    static let reload = Notification.Name("reload")
}

NotificationCenter.default.post(name: .reload, object: nil)

override func viewDidLoad() {
    super.viewDidLoad()
    NotificationCenter.default.addObserver(self, selector: #selector(reloadTableData), name: .reload, object: nil)
}

@objc func reloadTableData(_ notification: Notification) {
    tableView.reloadData()
}