修改detailNavigationBar，但也修改rootNavigationBar

Question

我有一个问题，当pushViewController从MainViewController到DetailViewController。我在MainViewController中的navigationBar是白色的，但当我将DetailViewController中的navigationBar项更改为白色或将backgrondColor更改为clear时，它在MainViewController中也会发生变化。就像视图是一样的，但只推送背景…

主视图

​

详细视图

​

再看一遍主视图

​

我正在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代码为：

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MainView并返回到clearColor控制器时，DetailViewController控制器中的DetailViewController从白色变为MainView ...

‍♂️

有什么问题吗？?请帮帮我！

谢谢!

Answer 1

在DetailViewController中使用以下代码

 self.navigationController?.navigationBar.isHidden = true

代替它的是：

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

并将此添加到MainViewController、viewWillAppear中

self.navigationController?.navigationBar.isHidden = false