仅在一个ViewController中更改导航栏属性

import UIKit

override func viewDidLoad() {
    super.viewDidLoad()
    
    // 设置导航栏背景颜色
    navigationController?.navigationBar.barTintColor = UIColor.blue
    
    // 设置导航栏标题颜色
    navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
    
    // 设置导航栏按钮颜色
    navigationController?.navigationBar.tintColor = UIColor.white
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    
    // 隐藏导航栏
    navigationController?.setNavigationBarHidden(true, animated: animated)
}

override func viewDidLoad() {
    super.viewDidLoad()
    
    // 添加左侧按钮
    let leftButton = UIBarButtonItem(title: "返回", style: .plain, target: self, action: #selector(backButtonTapped))
    navigationItem.leftBarButtonItem = leftButton
    
    // 添加右侧按钮
    let rightButton = UIBarButtonItem(title: "保存", style: .plain, target: self, action: #selector(saveButtonTapped))
    navigationItem.rightBarButtonItem = rightButton
}

@objc func backButtonTapped() {
    // 处理返回按钮点击事件
}

@objc func saveButtonTapped() {
    // 处理保存按钮点击事件
}