Swift 3 - AppDelegate - RootViewController

Question

我的AppDelegate函数didFinishLaunchingWithOptions

出现问题

我使用SnapSwipeView https://github.com/jakespracher/Snapchat-Swipe-View来控制我的相机＆＃39;我的AppDelegate中的ViewControler和if语句，以了解用户是否已登录Parse。

所以这是我的功能：

let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
var initialViewController: UIViewController
let left = storyboard.instantiateViewController(withIdentifier: "left")
let middle = storyboard.instantiateViewController(withIdentifier: "Camera")
let right = storyboard.instantiateViewController(withIdentifier: "right")
let top = storyboard.instantiateViewController(withIdentifier: "top")
let bottom = storyboard.instantiateViewController(withIdentifier: "bottom")    
let snapContainer = SnapContainerViewController.containerViewWith(left,
                                                                        middleVC: middle,
                                                                         rightVC: right,
                                                                         topVC: top,
                                                                         bottomVC: bottom)

self.window?.rootViewController = snapContainer

如果我只运行此rootViewController=snapContainer，，但是如果我添加此if语句，哪个工作正常：

if let user = user {
   print("logged")
   initialViewController = storyboard.instantiateViewController(withIdentifier: "Camera") as! UIViewController 
} else {
   print("not logged")
   initialViewController = storyboard.instantiateViewController(withIdentifier: "IntroMain") as! VideoSplashViewController 
}
self.window?.rootViewController = initialViewController
})

如果我的用户没有被记录，它会正确地转到我的IntroMain，但是一旦记录/注册，snapContainer就不能正常工作，因为它还没有已作为rootViewController启动

任何人都知道如何解决这个问题？

非常感谢，