王尘宇

AppDelegate.m  文件

下面是在网络封装的工具类里 判断的地方：

代码：

    AppDelegate *delegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];

    UINavigationController *selectVC = (UINavigationController*)delegate.tabBarVC.selectedViewController;

    LoginViewController * login = [[YMLoginViewController alloc]init];

    login.modalPresentationStyle = UIModalPresentationFullScreen;

    [selectVCpresentViewController:login animated:YES completion:nil];