界面跳转的进一步实现

           RootTabViewController *VC = (RootTabViewController *)self.window.rootViewController;
            [VC setSelectedIndex:1];
            BaseNavgationController *miu_root = (BaseNavgationController *)VC.selectedViewController;
            Miu_RootViewController *miu_root_viewcontrol = (Miu_RootViewController *)miu_root.topViewController;
            //消息列表
            MHmiuSystemMessageViewController *infoList = [[MHmiuSystemMessageViewController alloc]init];
            [miu_root_viewcontrol.navigationController pushViewController:infoList animated:YES];