在swift中，我在UIView中有一个UIButton在UIStackView中，但按钮没有响应

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let stackView = UIStackView()
        stackView.axis = .vertical
        stackView.alignment = .center
        stackView.spacing = 10
        
        let button = UIButton(type: .system)
        button.setTitle("Button", for: .normal)
        button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
        
        stackView.addArrangedSubview(button)
        view.addSubview(stackView)
        
        // 设置stackView的约束，确保其正确显示在视图中
        stackView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            stackView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            stackView.centerYAnchor.constraint(equalTo: view.centerYAnchor)
        ])
    }
    
    @objc func buttonTapped() {
        print("Button tapped")
    }
}