ios - setNavigationBarHidden 在 setViewControllers 之后不起作用

Question

我发现 setNavigationBarHidden 在 setViewControllers 之后不起作用？

这是我的代码:

• HomeNavController.swift:

  class HomeNavController: UINavigationController {
  
      weak var tabBar: HomeTabBar!
  
      var tab: HomeTab = .match {
          didSet {
              switch self.tab {
              case .match:
                  self.setViewControllers([MatchViewController()], animated: false)
              case .moments:
                  self.setViewControllers([MomentsViewController()], animated: false)
              case .myPosts:
                  self.setViewControllers([PostsViewController()], animated: false)
              }
          }
      }
  }
  

• MatchViewController.swift

  override func viewWillAppear(_ animated: Bool) {
      super.viewWillAppear(animated)
  
      self.navigationController?.setNavigationBarHidden(true, animated: false)
  }
  

当我第一次切换到 MatchViewController 实例时，它运行良好，但在我使用 func setViewControllers 更改 HomeNavController 实例的 viewControllers 后，它不起作用>.

这是UINavigationController的错误吗？

Answer 1

也许尝试设置属性，这对我来说有效:

    let navigationBarAppearance = UINavigationBar.appearance()
    let transparentColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0);
    // Sets the translucent background color
    navigationBarAppearance.backgroundColor = transparentColor
    navigationBarAppearance.titleTextAttributes = [NSForegroundColorAttributeName:transparentColor]
    // Hides the border
    navigationBarAppearance.shadowImage = UIImage()
    navigationBarAppearance.setBackgroundImage(UIImage(), for: .default)