ios - 在 Swift 中使用 switch 访问类属性

Question

我有以下类(class):

class Router: NSObject {

 enum Route {
    case auth
    case main
    case news
  }

  private var authNavigationController: UINavigationController?
  private var mainNavigationController: UINavigationController?
  private var newsNavigationController: UINavigationController?

func setInitialVC(){
    let vc = LoginService.initialVC()
    setRootViewControllerWithNavigationControlledEmbeded(route: .auth,
                                                         viewController: vc)
  }

  private func getCurrentNavC(_ route: Route) -> UINavigationController?{
    switch route {
    case .auth:
      return self.authNavigationController
    case .main:
      return self.mainNavigationController
    case .news:
      return self.newsNavigationController
    }
  }

  private func setRootViewControllerWithNavigationControlledEmbeded(route: Route,
                                                                    viewController: UIViewController){
    var navC = getCurrentNavC(route)
    self.window = UIWindow(frame: UIScreen.main.bounds)
    navC = UINavigationController.init(rootViewController: viewController)
    print("auth vc \(authNavigationController)")
    print("navC \(navC)")
    self.window?.rootViewController = navC
    self.window?.makeKeyAndVisible()
  }
}

当我打电话时

setRootViewControllerWithNavigationControlledEmbeded(route: Route, viewController: UIViewController){

我认为 var navC = getCurrentNavC(route) 将指向我的类变量 authNavigationController 但在日志中我可以看到以下内容:

auth vc nil
navC Optional(<UINavigationController: 0x7fd9ca025000>)

我想通过路由获取此属性，但看起来我的逻辑不起作用，为什么？

当应用程序刚刚启动时，它调用 - setInitialVC()

Answer 1

像下面这样修改 setRootViewControllerWithNavigationControlledEmbeded 函数并尝试。

private func setRootViewControllerWithNavigationControlledEmbeded(route: Route,
                                                                    viewController: UIViewController){
    var navC = getCurrentNavC(route)
    self.window = UIWindow(frame: UIScreen.main.bounds)
    //navC = UINavigationController.init(rootViewController: viewController)
    print("auth vc \(authNavigationController)")
    print("navC \(navC)")
    self.window?.rootViewController = navC
    self.window?.makeKeyAndVisible()
  }