Question

I’m currently writing an iPhone application that uses a UITabBarController with more than 5 Tab Bar Items. Thus, a ‘more’ tab is automatically generated (like in the YouTube Application). I found out that the corresponding view controller class is UIMoreListController, but I don’t have any corresponding .h files. So, my code looks like this:

@class UIMoreListController; // can't use #import since .h file is missing  @implementation SomeUINavigationControllerDelegate  - (void)navigationController:(UINavigationController *)navigationController         willShowViewController:(UIViewController *)viewController         animated:(BOOL)animated {      if ([viewController isKindOfClass:[UIMoreListController class]])          ... // do something if 'more' view is active 

This works like a charm. However, the compiler keeps giving me

warning: receiver ‘UIMoreListController’ is a forward class and corresponding @interface may not exist

Is there a neat way of getting rid of this warning (and this particular warning only)? Again, I can’t use #import since no .h file is available.

Answer 1

If you’re just trying to check for the UIMoreListController class you can access the class variable using the objc-api.

if ([viewController isKindOfClass:NSClassFromString(@'UIMoreListController')]) 

Then you don’t need the #import or the @class declaration.