Development requires manufacturers to merge the demo, which has a configuration page is storyboard do not bother to re-do the layout, copy and paste the habit of not sticking only to find from a storyboard to another. Baidu a lot better describe the contents of looking at a headache. Himself tried, found actually very simple.
1. to demo the main.storyboard renamed maindemo.storyboard, copied to the project directory
2. Add into the project
3. Call:
UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Maindemo" bundle:nil];
XXViewController *vc = [sb instantiateViewControllerWithIdentifier:NSStringFromClass([XXViewController class])];
vc.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:vc animated:YES];