Swift 加载具有NavigationController ID的ViewController

我需要帮助，我想在成功登录后通过调用他的NavigationController（仅带标识符）来启动我的ViewController

我试过这个代码，但是没有加载

     let homeController = self.storyboard!.instantiateViewController(withIdentifier: "NavigationController") 
    let homeController = homeController
viewControllers = [homeController]

上述代码将返回

UINavigationController

。您应该通过调用它的第一个子项来获取它的viewController。试试这个

// get navigation controller
let navController = self.storyboard!.instantiateViewController(withIdentifier: "NavigationController") as! UINavigationController

// get its first child
if let homeController = navController.viewControllers.first {
    viewControllers = [homeController]
}

---

确保故事板中的导航控制器id为“NavigationController”

// get navigation controller
let navController = self.storyboard!.instantiateViewController(withIdentifier: "NavigationController") as! UINavigationController

// get its first child
if let homeController = navController.viewControllers.first {
    viewControllers = [homeController]
}