关于presentViewController 后调用pushViewController

错误代码：

LoginViewController *loginVc = [[LoginViewController alloc] int];

[self presentViewController :loginVc animated:YES completion:nil];

以上代码运行结果，返回到loginVc后再次登录调用 pushViewController 无效没有任何反应。

解决方案：

UINavigationController *uiNavC = [[UINavigationController alloc] initWithRowViewController:[[LoginViewController alloc] int]];

[self presentViewController :uiNavC animated:YES completion:nil];