swift - 使用 NavigationController ID 加载 ViewController

Question

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

我尝试了这段代码，但它无法加载。

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

ViewController with NavigationController

Answer 1

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

上面的代码将返回UINavigationController。您应该通过调用它的第一个子级来获取它的 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]
}