UITabBarController *tabVC = (UITabBarController *)self.window.rootViewController;
UINavigationController *navVC = tabVC.selectedViewController;
SuperViewController *currentVC = (SuperViewController *)navVC.topViewController;
UITabBarController *tabVC = (UITabBarController *)self.window.rootViewController;
UINavigationController *navVC = tabVC.selectedViewController;
SuperViewController *currentVC = (SuperViewController *)navVC.topViewController;