Workaround to http://www.openradar.me/21404408. See related post at http://stackoverflow.com/questions/34813889/replacing-the-uiwindows-rootviewcontroller-while-using-a-transition-appears-to

AppDelegate.swift

    class FooViewController: UIViewController
    {
    }

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    
        let fooViewController = FooViewController()
        
        let view = self.window!.snapshotViewAfterScreenUpdates(false)
        let viewController = UIViewController()
        viewController.view.addSubview(view)

        self.window!.rootViewController = viewController
        
        self.window!.rootViewController?.presentViewController(dashboardViewController!, animated: true){ unowned let window = self.window!
            window.rootViewController = fooViewController
        }
    }