AppDelegate

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    self.window = UIWindow(frame: UIScreen.main.bounds)
    self.window?.backgroundColor = #colorLiteral(red: 0.2588235438, green: 0.7568627596, blue: 0.9686274529, alpha: 1)
    self.window?.makeKeyAndVisible()
    //创建导航视图控制器的根视图
    let vc = ViewController()
    //2.创建导航视图控制器，并为她制定根视图控制器
    let navigation = UINavigationController(rootViewController: vc)
    
    //3.将导航视图控制器设置为window的根视图控制器
    self.window?.rootViewController = navigation

   
    
    return true
}

ViewController:
class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    //调用设置导航条的方法
    self.setupNavigationBar()

}

func setupNavigationBar()  {

// UINavigationItem 配置他的时候设置的只是当前视图控制器上的当行跳的外观
// UINavigationBar 配置他的时候所有的视图都会显示
// self.title = "电话"
self.navigationItem.title = "消息"

     //设置title的颜色和字体大小
    let dic = [NSFontAttributeName:UIFont.systemFont(ofSize: 30.0),NSForegroundColorAttributeName:UIColor.red]
    self.navigationController?.navigationBar.titleTextAttributes = dic
    
    //创建按钮对象
    let rightButton = UIBarButtonItem(title: "跳转", style: .plain, target: self, action: #selector(rightBarButton))
    self.navigationItem.rightBarButtonItem = rightButton
    
    //配置左侧的leftbarbutton

    self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .camera, target: self, action: #selector(leftAction))
    
    
    //        UINavigationBar 配置他的时候所有的视图都会显示:配置的是公共的属性，此时是通过导航视图控制器来控制的

// 显隐性
self.navigationController?.isNavigationBarHidden = false
//导航栏样式
// self.navigationController?.navigationBar.barStyle = .black
//背景颜色 浅
self.navigationController?.navigationBar.backgroundColor = UIColor.green
//深 导航条的颜色

    self.navigationController?.navigationBar.barTintColor = UIColor.yellow
    //导航条设置控件颜色
    self.navigationController?.navigationBar.tintColor = UIColor.black
    
    
    
}

//MARK:-设置leftbarbutton的关联方法
    func leftAction()  {
        
        print("左侧按钮")
        
    }
    
    //MARK:-设置ringtbutton的关联方法
    func rightBarButton()   {
        //完成跳转
        let redVC = redViewController()
        self.navigationController?.pushViewController(redVC, animated: true)
        
    }
    

redViewController:

 override func viewDidLoad() {
        super.viewDidLoad()

        //导航条毛玻璃效果，半透明效果
        //导航栏半透明效果（IOS7之后总是yes）
        //当半透明效果开启时，屏幕左上角为坐标原点
        //关闭时导航栏左下角为坐标原点
        self.navigationController?.navigationBar.isTranslucent = false
        
        
        
        // Do any additional setup after loading the view.
        self.view.backgroundColor = UIColor.red
        self.setupNavigationBar()
        
//        self.navigationController?.isNavigationBarHidden = true
        let button = UIButton(type: .custom)
        button.frame = CGRect(x: 0, y: 0, width: 150, height: 100)
        button.setTitle("返回", for: .normal)
        button.backgroundColor = UIColor.black
        self.view.addSubview(button)
        button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
        
        
    }

//MARK:-left1的关联方法
    func left1Action(sender:UIBarButtonItem)  {
        self.navigationController?.popViewController(animated: true)
        
    }
    //MARK:-left2的关联方法
    func left2Action(sender:UIBarButtonItem)  {
        
    }