RxExtensions1.swift

func configureKeyboardListeners() {
    NotificationCenter.default.addObserver(forName: Notification.Name.UIKeyboardWillShow, object: nil, queue: nil) { notification in
        let keyboardFrame = notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! CGRect
        let keyboardHeight: CGFloat = keyboardFrame.height
        self.scrollView.contentInset.bottom = keyboardHeight
        self.scrollView.scrollIndicatorInsets.bottom = keyboardHeight
    }
    NotificationCenter.default.addObserver(forName: Notification.Name.UIKeyboardWillHide, object: nil, queue: nil) { notification in
        self.scrollView.contentInset.bottom = 0
        self.scrollView.scrollIndicatorInsets.bottom = 0
    }
}