テキストフィールドを切り替えた時UIPickerの中身も変わるようにしたい

前提・実現したいこと

テキストフィールドを切り替えた時UIPickerの中身のリストが切り替わるようにしたいです。

発生している問題・エラーメッセージ

dataListにlistが代入されません

該当のソースコード

swift
1import UIKit
2import AVFoundation
3
4class playViewController: UIViewController, UITextFieldDelegate{
5    
6    @IBOutlet weak var pitchText: UITextField!
7    @IBOutlet weak var speedText: UITextField!
8    let myPicker = UIPickerView()
9    let toolBar = UIToolbar()
10    
11    var dataList:[String] = []
12    let speedList = ["10", "20", "30", "40", "50", "60", "70", "80", "90", "100",
13                           "110", "120", "130", "140", "150", "160", "170", "180", "190", "200"]
14    let pitchList = ["-12", "-11", "-10", "-9", "-8", "-7", "-6", "-5", "-4", "-3", "-2", "-1", "0",
15                        "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "24"]
16   
17
18    override func viewDidLoad() {
19        super.viewDidLoad()
20        pitchText.tag = 1
21        speedText.tag = 2
22        createPicker()
23        createToolBar()
24    }
25        
26    func createPicker() {
27        myPicker.delegate = self
28        //myPicker.dataSource = self
29        myPicker.frame = CGRect(x: 0, y: 4500, width:375.0, height: 162.0)
30        myPicker.backgroundColor = UIColor.white
31        speedText.inputView = myPicker
32        pitchText.inputView = myPicker
33    }
34    
35    func createToolBar() {
36        toolBar.sizeToFit()
37        let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: "self", action: "myok:")
38        toolBar.setItems([doneButton], animated: false)
39        toolBar.isUserInteractionEnabled = true
40        
41        speedText.inputAccessoryView = toolBar
42        pitchText.inputAccessoryView = toolBar
43    }
44    
45    func myok(sender: UIBarButtonItem) {
46        view.endEditing(true)
47        speedText.resignFirstResponder()
48        pitchText.resignFirstResponder()
49    }
50    
51    func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
52        dataList = textField.tag == 1 ? pitchList : speedList
53        myPicker.reloadAllComponents()
54        return true
55    }
56
57}
58
59extension playViewController: UIPickerViewDelegate, UIPickerViewDataSource {
60    
61    func numberOfComponents(in pickerView: UIPickerView) -> Int {
62        return 1
63    }
64    
65    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
66        return dataList.count
67    }
68    
69    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
70        return dataList[row]
71    }
72    
73    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) -> String {
74        return dataList[row]
75    }
76}
77