override func viewDidLayoutSubviews() {
 tableView.frame = CGRect(x: 0, y: 0, width: tableView.frame.width, height: tableView.frame.height - (tabBarController?.tabBar.frame.size.height)!)
 }

override func viewDidLayoutSubviews() {
tableView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: (tabBarController?.tabBar.frame.size.height)!, right: 0)
}