keyboardAdjust.swift

    override func viewWillAppear(_ animated: Bool) {
        // Note cell keybaord adjustment
        NotificationCenter.default.addObserver(self, selector: #selector(adjustViewForKeyboardNotification(_:)), name: Notification.Name.UIKeyboardWillShow, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(adjustViewForKeyboardNotification(_:)), name: Notification.Name.UIKeyboardWillHide, object: nil)
    }

    override func viewWillDisappear(_ animated: Bool) {
        NotificationCenter.default.removeObserver(self)
    }

    func adjustViewForKeyboardNotification(_ notification: Notification) {
        let notif = (notification.userInfo as NSDictionary?) as? [String: NSValue]
        if let keyboardFrame = notif?[UIKeyboardFrameEndUserInfoKey]?.cgRectValue, let duration = notif?[UIKeyboardAnimationDurationUserInfoKey] as? Double {
            UIView.beginAnimations(nil, context: nil);
            UIView.setAnimationDuration(duration);
            UIView.setAnimationBeginsFromCurrentState(true);
            var tableViewFrame = tableView.frame
            let finalKeyboardFrame = view.convert(keyboardFrame, from: view.window)
            tableViewFrame.size.height = abs(finalKeyboardFrame.origin.y) + tableView.contentInset.bottom
            tableView.frame = tableViewFrame;
            tableView.scrollToRow(at: IndexPath(row: row, section: 0), at: UITableViewScrollPosition.bottom, animated: true)
            UIView.commitAnimations()
        }
    }