如何在swift 3中通过编程让所有ios设备的按钮居中对齐？

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建按钮对象
        let button = UIButton(type: .system)
        button.setTitle("按钮", for: .normal)
        
        // 添加按钮到视图中
        view.addSubview(button)
        
        // 设置按钮的约束
        button.translatesAutoresizingMaskIntoConstraints = false
        button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
        button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
    }
}