如何将数据传递给 UITabBarController? [英] How to pass data to UITabBarController?

问题描述

如何将数据从 UIViewController 传递到 UITabBarController 中的 UIViewController 之一?

How do I pass data from UIViewController to one of the UIViewController's inside UITabBarController?

以下方法无效:

let hospitalsController = segue.destination as! postRequest
hospitalsController.hospitalName = "Hospital Name"

尝试上述代码时，出现以下错误:

when trying above code, I get the following error:

Could not cast value of type 'UITabBarController' (0x10d05f418) to 'ProjectName.postRequest' (0x10b17fdd0).

当我尝试以下操作时:

let test = self.tabBarController?.viewControllers![0] as! UINavigationController
            let test2 = test.topViewController as! postRequest
            test2.hospitalName = "Khola Hospital"

应用程序崩溃没有错误，

The app crashed with no error,

当我尝试打印 print(tabBarController?.viewControllers) 时，它在控制台中显示了 nil

when I tried to print print(tabBarController?.viewControllers) it showed me nil in the console

将数据从 UIViewController 传递到 UITabBarController 内的 UIViewControllers 之一的正确方法是什么?

What is the correct way to pass data from UIViewController to one of the UIViewControllers inside UITabBarController?

更新这是我的主要故事板

数据要从顶部UIViewController传递到右下UIViewController

The data is to be passed from he top UIViewController to the bottom right UIViewController

推荐答案

你太封闭了，不能让它工作只有一个错误你需要将 segue.destination 转换为 UITabBarController 你们都准备好了.

You are too closed to make it work only one mistake you need to cast segue.destination to UITabBarController and you all set to go.

if let tabbarController = segue.destination as? UITabBarController, 
   let postVC = tabbarController.viewControllers?.first as? postRequest, 

     postVC.hospitalName = "Khola Hospital"
}

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