ios 如何将coordinator模式应用于tabBar？

rta7y2nd 于 2023-03-14 发布在 iOS

关注(0)|答案(2)|浏览(150)

我想将coordinator模式应用到选项卡栏。
首先，我的AppCoordinator

class AppCoordinator: Coordinator {
   let window: UIWindow?
   var navigationController: UINavigationController
   var childCoordinator: [Coordinator] = []
   var parentCoordinator: Coordinator?
    
    init(_ window: UIWindow?, navigationController: UINavigationController) {
        self.window = window
        self.navigationController = navigationController
        window?.makeKeyAndVisible()
    }
    
    func start() {
        var tabBarController = setTabBarController()
        self.window?.rootViewController = tabBarController
    }
    
    func setTabBarController() -> UITabBarController {
        let tabBar = UITabBarController()
        
        let firstItem = UITabBarItem(title: nil, image: Image.mainImg, tag: 0)
        let secondItem = UITabBarItem(title: nil, image: Image.searchImg, tag: 1)
        let thirdItem = UITabBarItem(title: nil, image: Image.likePostImg, tag: 2)
        let fourItem = UITabBarItem(title: nil, image: Image.profileImg, tag: 3)
        
        
        let firstCoordinator = MainCoordinator(navigationController: navigationController)
        firstCoordinator.parentCoordinator = self
        childCoordinator.append(firstCoordinator)
        let firstVC = firstCoordinator.startPush()
        firstVC.tabBarItem = firstItem
        
        let secondCoordinator = SearchCoordinator(navigationController: navigationController)
        secondCoordinator.parentCoordinator = self
        childCoordinator.append(secondCoordinator)
        let secondVC = secondCoordinator.startPush()
        secondVC.tabBarItem = secondItem
        
        let thirdCoordinator = LikePostCoordinator(navigationController: navigationController)
        thirdCoordinator.parentCoordinator = self
        childCoordinator.append(thirdCoordinator)
        let thirdVC = thirdCoordinator.startPush()
        thirdVC.tabBarItem = thirdItem
        
        tabBar.viewControllers = [firstVC, secondVC, thirdVC]
        
        return tabBar
    }
}

我的MainCoordinator：

class MainCoordinator: baseCoordinator {

    func startPush() -> UINavigationController {
        
        let MainVC = MainViewController(viewModel: .init(coordinator: self))
        
        navigationController.setViewControllers([MainVC], animated: true)
        return navigationController
    }
}

searchVC和likePostVC是相同的。
但是，我的执行结果如下：

为什么我的执行结果是这样的？

ios

来源：https://stackoverflow.com/questions/73197165/how-do-i-apply-the-coordinator-pattern-to-the-tabbar

2条答案

按热度按时间

niwlg2el1#

我认为你需要一个tabBarController的协调器，在这个协调器的开始，你把你的子协调器添加到你的tabBarCoordinator。
登录流程总是在tabBar之前，在启动AppCoordinator时，我初始化登录并将appCoordinator. rootViewController设置为loginCoordinator. rootViewController。

class AppCoordinator() {
      func start() { 
      // Mostly initializing login.
      // somehow loginCoordinator triggers coordinatorDelegate.goToTabBar()
   }

   func goToTabBar() {
    tabBarCoordinator = TabBarCoordinator(root: root, dependencies: dependencies)
    tabBarCoordinator.coordinatorDelegate = self
    tabBarCoordinator.start()
   }
}

下面是我启动TabBarCoordinator的方法：

class TabBarCoordinator {
 func start() { 
     let tabBarController = TabBarController()
     
     let firstCoordinator = //
     children.append(firstCoordinator)]
     firstCoordinator.start()
     
     let controller1 = UIViewController()
     controller1 = firstCoordinator.rootViewController

    // Do the same for second..
    
   tabBarController.viewControllers = [controller1, controller2]
   rootViewController.show(tabBarController, sender: nil)
   }

下面是如何初始化子协调器：

class FirstCoordinator {
    func start() { 
     let firstVC = FirstViewController()
     let navController = UINavigationController(rootViewController: firstVC)
     rootViewController = navController
    }  
}

我试着简化代码，这可能不是你要找的直接答案，但我认为这将有助于理解模式。}

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mrzz3bfm2#

我看到两个问题：
1.使parentConordinator为weak以防止保留循环
1.你正在传递相同的navigationController到你所有的标签根目录。2这不起作用，可能就是你所看到的问题的原因。

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