Ios AppDelegate中的开关视图（Swift）

我需要根据用户是否注册设置我的应用程序的起始视图。 这将在AppDelegate中完成：

       func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
            if(isUserRegistrated() == true){
                let vc : AnyObject! = self.storyboard.instantiateViewControllerWithIdentifier("isRegistrated")
                    self.showViewController(vc as UIViewController, sender: vc)
            }
            else{
                let vc : AnyObject! = self.storyboard.instantiateViewControllerWithIdentifier("isNOTRegistrated")
                    self.showViewController(vc as UIViewController, sender: vc)
            }
       }

在这一点上，我得到了错误： “AppDelegate类型的值没有序列图像板的成员”

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有什么结论吗

示例：

let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("someViewController") as! UIViewController
self.presentViewController(vc, animated: true, completion: nil)

---

示例：

let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("someViewController") as! UIViewController
self.presentViewController(vc, animated: true, completion: nil)

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你注册了你的故事板吗？我如何注册我的故事板？你注册了你的故事板吗？我如何注册我的故事板？当我这样做时，我得到错误：“Instants成员故事板不能用于类型AppDelegate”当我这样做时，我得到错误：“Instants成员故事板不能用于类型AppDelegate”