Question

我已经创建了一个基本的单视图应用程序。现在使用Xcode 11。我总是以编程方式构建应用程序，因为我开始的教程从未使用过界面构建器。由于某种原因，pushViewController无法正常工作。似乎在我使用Xcode 10构建的其他项目中也能正常工作。

应用内委托

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        window = UIWindow()
        window?.makeKeyAndVisible()
        let nc = UINavigationController(rootViewController: ViewController())
        window?.rootViewController = nc

        return true
    }

在我的viewController中

@objc func handleChat(){
    print("Chat pressed")
    navigationController?.pushViewController(InboxViewController(), animated: true)
}

Answer 1

AppDelegate.swift

var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        let VC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ViewController") as? ViewController
        var Nav: UINavigationController? = nil
        if let VC = VC {
            Nav = UINavigationController(rootViewController: VC)
        }
        window?.rootViewController = Nav
        return true
    }

删除SceneDelegate.swift

转到Info.plist

删除应用场景清单

这对我有用。

navigationController.pushViewController似乎在Xcode 11中不起作用？

1 个答案: