keyboardAdjust.swift

    @objc dynamic func adjustViewForKeyboardNotification(_ notification: Notification) {
        guard let notif = (notification.userInfo as NSDictionary?) as? [String: AnyObject] else { return }
        guard let keyboardFrame = notif[UIKeyboardFrameEndUserInfoKey]?.cgRectValue, let duration = notif[UIKeyboardAnimationDurationUserInfoKey] as? Double else {
            return
        }
        UIView.beginAnimations(nil, context: nil)
        UIView.setAnimationDuration(duration)
        if let curve = notif[UIKeyboardAnimationCurveUserInfoKey] as? Int {
            UIView.setAnimationCurve(UIViewAnimationCurve(rawValue: curve)!)
        }
        UIView.setAnimationBeginsFromCurrentState(true)
        var inset = tableView.contentInset
        if notification.name == .UIKeyboardWillShow {
            inset.bottom = keyboardFrame.height
        } else {
            inset.bottom = 0
        }
        tableView.contentInset = inset
        UIView.commitAnimations()
        if let row = cells.index(of: .notes) {
            tableView.scrollToRow(at: IndexPath(row: row, section: 0), at: UITableViewScrollPosition.bottom, animated: true)
        }
    }