Xcode toolbar上のDoneボタンでPickerViewを閉じたい

xcode10.3でiosアプリを制作しています

https://teratail.com/questions/124301
上の記事を参考にして、pickerViewで選択しtoolbar上のDoneボタンを押す、という動作をさせたいのですが、うまくいきません
pickerViewのviを消す方法を教えて欲しいです

swift
1import UIKit
2
3class tableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource,UIPickerViewDelegate, UIPickerViewDataSource{
4
5　　var appDelegate = UIApplication.shared.delegate as! AppDelegate
6
7   //buttonを押す
8   @IBAction func switchAcounts(_ sender: Any) {
9        pickerView.frame = CGRect(x: 0, y: 0
10            , width: UIScreen.main.bounds.size.width, height: pickerView.bounds.size.height)
11        pickerView.delegate   = self
12        pickerView.dataSource = self
13        
14        let vi = UIView(frame: pickerView.bounds)
15        vi.backgroundColor = UIColor.white
16        vi.addSubview(pickerView)
17        
18        let toolBar = UIToolbar()
19        toolBar.barStyle = UIBarStyle.default
20        toolBar.isTranslucent = true
21        toolBar.tintColor = UIColor.black
22        
23        let doneButton   = UIBarButtonItem(title: "Done", style: UIBarButtonItem.Style.done, target: self, action: #selector(EditMoneyViewController.donePressed))
24        let spaceButton  = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
25        
26        toolBar.setItems([spaceButton, doneButton], animated: false)
27        toolBar.isUserInteractionEnabled = true
28        toolBar.sizeToFit()
29        vi.addSubview(toolBar)
30        view.addSubview(vi)
31
32        let screenSize = UIScreen.main.bounds.size
33        vi.frame.origin.y = screenSize.height
34        UIView.animate(withDuration: 0.3) {
35            vi.frame.origin.y = screenSize.height - vi.bounds.size.height
36        }
37    }
38    
39    func numberOfComponents(in pickerView: UIPickerView) -> Int {
40        return 1
41    }
42    
43    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
44        return appDelegate.accountSum
45    }
46
47    
48    func pickerView(_ pickerView: UIPickerView,
49                    titleForRow row: Int,
50                    forComponent component: Int) -> String? {
51        return appDelegate.nameOfAccounts[row]
52    }
53
54    func pickerView(_ pickerView: PickerView,
55                    didSelectRow row: Int,
56                    inComponent component: Int) {
57        appDelegate.accountCount = row
58    }
59    
60    @objc func donePressed() {
61        view.endEditing(true)
62    }
63   
64
65}
66