TableViewExtras.swift

extension UIViewController {

    func adjustTableViewInsects(tableView: UITableView?) {
        guard let tableView = tableView, let navigationController = navigationController else {
            return
        }
        automaticallyAdjustsScrollViewInsets = false

        let statusBarHeight = UIApplication.sharedApplication().statusBarFrame.size.height
        let navigationBarHeight = navigationController.navigationBar.bounds.size.height

        tableView.contentInset.top = statusBarHeight + navigationBarHeight
        tableView.scrollIndicatorInsets = tableView.contentInset
    }

}