Question

I want to do the following :

@interface UINavigationController ()

-(void)removeFromNavigationStack:(Class)aClass;

@end

and in .m file

@implementation UINavigationController

-(void)removeFromNavigationStack:(Class)aClass {

}

but in the .m file there are a lot of warning like “Method definition for ‘initWithRootViewController:’ not found”

how can I avoid this ? I’ve tried including but still have the warnings

Thanks

Answer 1

Since you’re dealing with UINavigationController, a UIKit class, you probably want to go with a category, instead. Extensions need to be defined within the main @implementation block of the class’s implementation, and you don’t have access to that for UINavigationController

From the docs:

Class extensions are like anonymous categories, except that the methods they declare must be implemented in the main @implementation block for the corresponding class. Using the Clang/LLVM 2.0 compiler, you can also declare properties and instance variables in a class extension.