This code gives me the error Cannot find interface declaration for 'OGWView'
:
typedef SKNode OGWView;
@interface OGWView (Category)
@end
Why? Shouldn't the category work just as well with a typedef name?
PS: I know I can fix this with a #define (or by using the original class name) but I'm really more interested in understanding why it isn't possible to create a category on a typedef class.
I believe the answer to this question is that you have 2 different kinds of symbol. I believe the typedef is an object and you are trying to use it as a class symbol.
depending on the order of declaration you get different warnings suggesting as much:
typedef NSObject Foo;
@class Foo;
yields:
Redefinition of forward class 'Foo' of a typedef name of an object type is ignored
@class Foo;
typedef NSObject Foo;
yields:
Redefinition of 'Foo' as different kind of symbol