Gets information about all methods that are defined in an Objective-C protocol. Returns an array of dictionaries with the selector and argument types for each method in NSString form.

PXProtocolMethodList.h

#import <Foundation/Foundation.h>

extern NSString * const PXProtocolMethodListMethodNameKey;
extern NSString * const PXProtocolMethodListArgumentTypesKey;

NSArray *px_allProtocolMethods(Protocol *protocol);

PXProtocolMethodList.m

#import <objc/runtime.h>

NSString * const PXProtocolMethodListMethodNameKey = @"methodName";
NSString * const PXProtocolMethodListArgumentTypesKey = @"types";

NSArray *px_allProtocolMethods(Protocol *protocol)
{
    NSMutableArray *methodList = [[NSMutableArray alloc] init];

    // We have 4 permutations as protocol_copyMethodDescriptionList() takes two BOOL arguments for the types of methods to return.
    for (NSUInteger i = 0; i < 4; ++i) {
        unsigned int numberOfMethodDescriptions = 0;
        struct objc_method_description *methodDescriptions = protocol_copyMethodDescriptionList(protocol, (i / 2) % 2, i % 2, &numberOfMethodDescriptions);

        for (unsigned int j = 0; j < numberOfMethodDescriptions; ++j) {
            struct objc_method_description methodDescription = methodDescriptions[j];
            [methodList addObject:@{PXProtocolMethodListMethodNameKey: NSStringFromSelector(methodDescription.name),
                                    PXProtocolMethodListArgumentTypesKey: [NSString stringWithUTF8String:methodDescription.types]}];
        }

        free(methodDescriptions);
    }

    return methodList;
}

Thanks ;)