我有两个视图控制器:第一个登录,第二个是主视图控制器。当我尝试在appdelegate
课堂上展示登录视图控制器时,我收到以下警告:
2013-06-24 04:44:42.158 scrumptious[4506:19a03] Warning: Attempt to present <SCLoginViewController: 0x9490800> on <UINavigationController: 0x948b0d0> whose view is not in the window hierarchy!