3D触摸快速操作不会工作迅速3

Question

我想在我的应用程序中添加3D触摸快速操作。我有两个viewContollers嵌入在navigationContoller中。当用户按下3D动作时，它应该将它们带到add事件viewController。但我得到这个错误

could not cast value of type 'Morning_Star_2.AddEventsViewController' (0x1000a2260) to 'UINavigationController' (0x1a79cd360). 2017-05-02 02:51:36.220324-0400 Morning Star 2[3731:895126] Could not cast value of type 'Morning_Star_2.AddEventsViewController' (0x1000a2260) to 'UINavigationController' (0x1a79cd360).

这里是我的代码

func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) { 
    if shortcutItem.type == "com.krp.addEvent" { 
     let sb = UIStoryboard(name: "Main", bundle: nil) 
     let addEventVC = sb.instantiateViewController(withIdentifier: "addEventVC") as! UINavigationController 
     self.window?.rootViewController?.present(addEventVC, animated: true, completion: nil) 
    } 
} 

我试图改变的！ UINavigationController为！ AddEventsViewController。它可以工作，但是如果您正常打开应用程序，它将不会像我通常在添加viewController时那样在顶部显示导航栏。

Here is my main.storyboard

Answer 1

你不应该投AddEventsViewController到UINavigationController，因为它不是UINavigationController，只是UIViewController子类。但正如我所看到的，你的rootViewController是。所以，你需要将其转换为UINavigationController，然后把你的AddEventsViewController，而不是现在，你会看到NavigationBar

func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) { 
     if shortcutItem.type == "com.krp.addEvent" { 
     let sb = UIStoryboard(name: "Main", bundle: nil) 
     let addEventVC = sb.instantiateViewController(withIdentifier: "addEventVC") as! AddEventsViewController 
     if let navigationController = window?.rootViewController as? UINavigationController { 
      navigationController.pushViewController(addEventVC, animated: true) 
     } 
    } 
}