Call this method on UIStoryboard:
+ (UIStoryboard *)storyboardWithName:(NSString *)name bundle:(NSBundle *)storyboardBundleOrNil
probably like this if your view controller live in 'MainStoryboard.storyboard':
UIViewController *viewControllerForPopover =
[[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]instantiateViewControllerWithIdentifier:@"viewForPopover"];