修改detailNavigationBar，但也修改了rootNavigationBar

Question

当从MainViewController到DetailViewController的pushViewController时出现问题。我在MainViewController中的navigationBar是白色的，但当我将DetailViewController中的navigationBar项目更改为white或backgrondColor以清除时，它在MainViewController中也会发生变化。它就像视图一样，但只推动背景...

主视图

详情视图

主要观点再次

我是以编程方式编写我的应用程序（没有故事板）。 AppDelegate是这样的：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    /********** Storyboard Config **********/
    window = UIWindow(frame: UIScreen.main.bounds)
    window?.makeKeyAndVisible()
    window?.rootViewController = TabBarController()

    return true
}

TabBarController是这样的：

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(true)

    // Create Tab MainViewController
    let mainNavigationController = MainViewController(collectionViewLayout: UICollectionViewFlowLayout())
    mainNavigationController.title = "Main"
    let mainController = UINavigationController(rootViewController: mainNavigationController)
    mainController.title = "Main"
    mainController.tabBarItem.image = UIImage(named: "UITabBarBookmarksTemplate")
    mainController.tabBarItem.selectedImage = UIImage(named: "UITabBarBookmarksTemplateSelected")

    // Create Tab UserViewController
    let userNavigationController = UserViewController(collectionViewLayout: UICollectionViewFlowLayout())
    userNavigationController.title = ""
    let userController = UINavigationController(rootViewController: userNavigationController)
    userController.title = "Profile"
    userController.tabBarItem.image = UIImage(named: "UITabBarContactsTemplate")
    userController.tabBarItem.selectedImage = UIImage(named: "UITabBarContactsTemplateSelected")

    viewControllers = [mainController, userController]

}

MainViewController的pushViewController代码是：

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let layout = UICollectionViewFlowLayout()
    let controller = DetailViewController(collectionViewLayout: layout)
    controller.data = cloudDatas?[indexPath.item]

    navigationController?.pushViewController(controller, animated: true)
}

我在DetailViewController中唯一改变的是：

// Translucent Navigation Bar
    self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
    self.navigationController?.navigationBar.shadowImage = UIImage()
    self.navigationController?.navigationBar.isTranslucent = true
    self.navigationController?.navigationBar.backgroundColor = UIColor.clear
    self.navigationController?.navigationBar.tintColor = UIColor.white

使用此代码，当我导航到DetailViewController并返回MainView控制器时，MainView控制器中的navigationBar从白色变为clearColor ...

♂️

问题是什么？请帮忙！

谢谢！

Answer 1

在DetailViewController中使用以下内容：

 self.navigationController?.navigationBar.isHidden = true

取代这个：

self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = true
self.navigationController?.navigationBar.backgroundColor = UIColor.clear
self.navigationController?.navigationBar.tintColor = UIColor.white

并在MainViewController，viewWillAppear中添加：

self.navigationController?.navigationBar.isHidden = false