Ios 无法强制转换类型为'；UIViewController'；到另一个viewcontroller

试图在视图控制器之间传递数据，但不断出现错误：

Could not cast value of type 'UIViewController' (0x10b4e4ca8) to 'StockList.AllListsTableViewController' (0x106d963f0).

我已检查以确保为视图控制器设置了类，但它仍然不起作用。以下是我的代码：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    let navigationController = window!.rootViewController as! UITabBarController
    let controller = navigationController.viewControllers![0] as! AllListsTableViewController
    controller.dataModel = dataModel
    return true
}

---

提前感谢

首先确保从Identity Inspector（

AllListsTableViewController

）将类名设置为IB中的VC

第二次使用

let tab = window!.rootViewController as! UITabBarController
let navigation = tab.viewControllers![0] as! UINavigationController
let controller = navigation.viewControllers![0] as! AllListsTableViewController
controller.dataModel = dataModel