同じビュー内に違う値を持つPickerViewを2つ表示する

画像のように年月日と時間をPickerViewで入力できるようなオブジェクトを設置したいと考えています。

このホームページを参考にしてキーボード入力時にデートピッカーが表示するオブジェクトを設置しました。
https://qiita.com/Takarkiz/items/5b559a63598e3d641c3a

さらに以下のホームページを参考にして、tagをつけて同じビュー内に違う値を持つPickerViewを設置しようとしたところ、出来ませんでした。
https://teratail.com/questions/59982

教えていただきたいこと
①同じビュー内に違う値を持つPickerViewを2つ表示する方法

import UIKit
class testViewController: UIViewController, UITextFieldDelegate{

var toolBar:UIToolbar!


    @IBOutlet weak var wakeTimeTextField: UITextField!

    @IBOutlet weak var textfield2: UITextField!
    override func viewDidLoad() {
    super.viewDidLoad()

    wakeTimeTextField.tag = 1
    wakeTimeTextField.delegate = self
    setupToolbar()

    textfield2.tag = 2
        textfield2.delegate = self
}
func setupToolbar() {
        //datepicker上のtoolbarのdoneボタン
        toolBar = UIToolbar()
        toolBar.sizeToFit()
        let toolBarBtn = UIBarButtonItem(title: "DONE", style: .plain, target: self, action: #selector(doneBtn))
        toolBar.items = [toolBarBtn]
        wakeTimeTextField.inputAccessoryView = toolBar
}

func textFieldDidBeginEditing(_ textField: UITextField) {
    if wakeTimeTextField.tag == 1{
    let datePickerView:UIDatePicker = UIDatePicker()
    datePickerView.datePickerMode = UIDatePicker.Mode.date
    textField.inputView = datePickerView
        datePickerView.addTarget(self, action: #selector(datePickerValueChanged(sender:)), for: UIControl.Event.valueChanged)}else{
        let datePickerView:UIDatePicker = UIDatePicker()
        datePickerView.datePickerMode = UIDatePicker.Mode.time
        textField.inputView = datePickerView
            datePickerView.addTarget(self, action: #selector(datePickerValueChanged(sender:)), for: UIControl.Event.valueChanged)}
}

    //datepickerが選択されたらtextfieldに表示
@objc func datePickerValueChanged(sender:UIDatePicker) {
    if wakeTimeTextField.tag == 1{
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat  = DateFormatter.dateFormat(fromTemplate: "yMMMdE", options: 0, locale: Locale(identifier: "ja_JP"))
        wakeTimeTextField.text = dateFormatter.string(from: sender.date)}else
    {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat  = DateFormatter.dateFormat(fromTemplate: "H:mm", options: 0, locale: Locale(identifier: "ja_JP"))
        textfield2.text = dateFormatter.string(from: sender.date)}
}

//toolbarのdoneボタン
@objc func doneBtn(){
    wakeTimeTextField.resignFirstResponder()
}
}

追記です。

import UIKit
class testViewController: UIViewController, UITextFieldDelegate{

var toolBar:UIToolbar!


    @IBOutlet weak var wakeTimeTextField: UITextField!

    @IBOutlet weak var textfield2: UITextField!
    override func viewDidLoad() {
    super.viewDidLoad()

    wakeTimeTextField.tag = 1
    wakeTimeTextField.delegate = self
    setupToolbar()

    textfield2.tag = 2
        textfield2.delegate = self
}
func setupToolbar() {
        //datepicker上のtoolbarのdoneボタン
        toolBar = UIToolbar()
        toolBar.sizeToFit()
        let toolBarBtn = UIBarButtonItem(title: "DONE", style: .plain, target: self, action: #selector(doneBtn))
        toolBar.items = [toolBarBtn]
        wakeTimeTextField.inputAccessoryView = toolBar
}

func textFieldDidBeginEditing(_ textField: UITextField) {
    if wakeTimeTextField.tag == 1{
    let datePickerView:UIDatePicker = UIDatePicker()

        datePickerView.tag = 1//追加

    datePickerView.datePickerMode = UIDatePicker.Mode.date
    textField.inputView = datePickerView
        datePickerView.addTarget(self, action: #selector(datePickerValueChanged(sender:)), for: UIControl.Event.valueChanged)}else{
        let datePickerView:UIDatePicker = UIDatePicker()

        datePickerView.tag = 2//追加


        datePickerView.datePickerMode = UIDatePicker.Mode.time
        textField.inputView = datePickerView
            datePickerView.addTarget(self, action: #selector(datePickerValueChanged(sender:)), for: UIControl.Event.valueChanged)}
}

    //datepickerが選択されたらtextfieldに表示
@objc func datePickerValueChanged(sender:UIDatePicker) {

    if sender.tag == 1{//変更

    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat  = DateFormatter.dateFormat(fromTemplate: "yMMMdE", options: 0, locale: Locale(identifier: "ja_JP"))
        wakeTimeTextField.text = dateFormatter.string(from: sender.date)}else
    {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat  = DateFormatter.dateFormat(fromTemplate: "H:mm", options: 0, locale: Locale(identifier: "ja_JP"))
        textfield2.text = dateFormatter.string(from: sender.date)}
}

//toolbarのdoneボタン
@objc func doneBtn(){
    wakeTimeTextField.resignFirstResponder()
}
}