我正在尝试使用StoryBoards展示我创建的ViewController:
AuthViewController *authViewController = [[AuthViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:authViewController];
UIViewController *vc = [[[[UIApplication sharedApplication] windows] firstObject] rootViewController];
[vc presentViewController:nav animated:YES completion:nil];
但是屏幕显示黑屏,可能是什么问题?