点击时不会触发自定义UIView中的UIButton

import UIKit

class CustomView: UIView {
    private let button = UIButton(type: .system)

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupButton()
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupButton()
    }

    private func setupButton() {
        // 设置按钮的标题和颜色
        button.setTitle("Click Me", for: .normal)
        button.setTitleColor(.white, for: .normal)
        
        // 设置按钮的背景颜色
        button.backgroundColor = .blue
        
        // 设置按钮的大小和位置
        button.frame = CGRect(x: 20, y: 20, width: 100, height: 50)
        
        // 确保按钮的交互性是开启的
        button.isUserInteractionEnabled = true
        
        // 添加按钮的目标-动作
        button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
        
        // 将按钮添加到视图中
        addSubview(button)
    }
    
    @objc private func buttonTapped() {
        print("Button tapped!")
    }
}