如何以编程方式将按钮项添加到现有导航栏Xcode

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建一个UIBarButtonItem
        let button = UIBarButtonItem(title: "Next", style: .plain, target: self, action: #selector(nextButtonTapped))
        
        // 获取当前导航项
        let navigationItem = self.navigationItem
        
        // 将按钮添加到导航项的右侧
        navigationItem.rightBarButtonItem = button
    }
    
    @objc func nextButtonTapped() {
        print("Next button tapped")
        // 这里可以添加跳转到下一个视图控制器的逻辑
    }
}