Using Super in an Objective C Category?

Question

I\'d like to override a method in an Objective C class that I don\'t have the source to.

I\'ve looked into it, and it appears that Categories should allow me to do t

Answer 1

Not exactly in category but there is a workaround by adding the method dynamically at runtime. Samuel Défago in his article describes a neat way to create block IMP implementation calling super, his original article can be found here

The relevant code is:

#import 
#import 

    const char *types = method_getTypeEncoding(class_getInstanceMethod(clazz, selector));
    class_addMethod(clazz, selector, imp_implementationWithBlock(^(__unsafe_unretained id self, va_list argp) {
        struct objc_super super = {
            .receiver = self,
            .super_class = class_getSuperclass(clazz)
        };

        id (*objc_msgSendSuper_typed)(struct objc_super *, SEL, va_list) = (void *)&objc_msgSendSuper;
        return objc_msgSendSuper_typed(&super, selector, argp);
    }), types);