Runtime @protocol introspection

gistfile1.m

+ (void)enumerateAdoptedProtocolsOfProtocol:(Protocol *)protocol usingBlock:(void(^)(Protocol *adoptedProtocol))block {
    unsigned int adoptedCount = 0;
    Protocol * __unsafe_unretained *adoptedProtocolList = protocol_copyProtocolList(protocol, &adoptedCount);
    if (adoptedProtocolList) {
        for (NSUInteger index = 0; index < adoptedCount; index++) {
            Protocol *adoptedProtocol = adoptedProtocolList[index];
            
            block(adoptedProtocol);
        }
        free(adoptedProtocolList);
    }
}


+ (void)enumerateMethodsInProtocol:(Protocol *)protocol
                          required:(BOOL)onlyRequired
                          instance:(BOOL)onlyInstance
                        usingBlock:(void(^)(SEL selector, NSMethodSignature *signature))block {
    unsigned int methodCount = 0;
    struct objc_method_description *methods = protocol_copyMethodDescriptionList(protocol, onlyRequired, onlyInstance, &methodCount);
    if (methods) {
        for (NSUInteger index = 0; index < methodCount; index++) {
            struct objc_method_description method = methods[index];
            NSMethodSignature *signature = [NSMethodSignature signatureWithObjCTypes:method.types];
            
            block(method.name, signature);
        }
        free(methods);
    }
}