swift - 修改detailNavigationBar但也修改rootNavigationBar

Question

将 ViewController 从 MainViewController 推送到 DetailViewController 时遇到问题。我的 MainViewController 中的导航栏是白色的，但是当我将 DetailViewController 中的导航栏项目更改为白色或背景颜色以清除时，它在 MainViewController 中也会发生变化。就像 View 是一样的，但只推送背景......

主视图

详细 View

再次主视图

我正在以编程方式编写我的应用程序(没有 Storyboard)。 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 DetailViewController 并返回到 MainView Controller 时，MainView Controller 中的导航栏从白色更改为透明颜色...

有什么问题吗？请帮忙!

Answer 1

在DetailViewController中使用以下内容:

 self.navigationController?.navigationBar.isHidden = true

代替这个:

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

并将其添加到MainViewController，viewWillAppear中:

self.navigationController?.navigationBar.isHidden = false