如何通过触摸按钮来扩展、隐藏pickerView？斯威夫特

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    var pickerView: UIPickerView!
    var button: UIButton!
    var pickerData = ["Option 1", "Option 2", "Option 3"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建按钮
        button = UIButton(type: .system)
        button.frame = CGRect(x: 100, y: 100, width: 200, height: 50)
        button.setTitle("Toggle Picker", for: .normal)
        button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
        view.addSubview(button)
        
        // 创建pickerView
        pickerView = UIPickerView()
        pickerView.frame = CGRect(x: 100, y: 200, width: 200, height: 200)
        pickerView.delegate = self
        pickerView.dataSource = self
        pickerView.isHidden = true
        view.addSubview(pickerView)
    }
    
    @objc func buttonTapped() {
        // 切换pickerView的可见性
        pickerView.isHidden = !pickerView.isHidden
    }
    
    // UIPickerViewDataSource方法
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return pickerData.count
    }
    
    // UIPickerViewDelegate方法
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return pickerData[row]
    }
}