 
 class Router: NSObject {
     static let FTFlipAnimationDuration = 0.5
-    static let sharedInstance = FTRouter()
+    static let sharedInstance = Router()
     
     var window : UIWindow
     

            self.window.rootViewController = viewController
            completion?(finished: true)
        }else{
            UIView.transitionFromView(self.window.rootViewController!.view!, toView: viewController.view, duration: FTRouter.FTFlipAnimationDuration, options: UIViewAnimationOptions.TransitionFlipFromLeft) { [unowned self] (finished) -> Void in
                UIView.setAnimationsEnabled(oldState)
                self.window.rootViewController = viewController
                completion?(finished: finished)

    //MARK: - Routing
    
    func showInitialViewController() {

    }
    
    //MARK: - Utils
