POST with both URL parameters & JSON body in AFNetworking

gistfile1.m

@interface MixedPOSTHTTPSessionManager : AFHTTPSessionManager
- (NSURLSessionDataTask *)POST:(NSString *)URLString
                    parameters:(id)parameters
                JSONParameters:(NSDictionary *)jsonParameters
                       success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure;
@end

@implementation MixedPOSTHTTPSessionManager

- (instancetype)initWithBaseURL:(NSURL *)url sessionConfiguration:(NSURLSessionConfiguration *)configuration
{
    self = [super initWithBaseURL:url sessionConfiguration:configuration];
    if (self) {
        // make request serializer able to put parameters into the URL query of POST requests
        self.requestSerializer.HTTPMethodsEncodingParametersInURI = [self.requestSerializer.HTTPMethodsEncodingParametersInURI setByAddingObject:@"POST"];
    }
    return self;
}

- (NSURLSessionDataTask *)POST:(NSString *)URLString parameters:(id)parameters JSONParameters:(NSDictionary *)JSONParameters
                       success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
{
    NSError *serializationError = nil;
    NSMutableURLRequest *request = [self.requestSerializer requestWithMethod:@"POST" URLString:[[NSURL URLWithString:URLString relativeToURL:self.baseURL] absoluteString] parameters:parameters error:&serializationError];
    if (!request) {
        if (failure) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wgnu"
            dispatch_async(self.completionQueue ?: dispatch_get_main_queue(), ^{
                failure(nil, serializationError);
            });
#pragma clang diagnostic pop
        }
        
        return nil;
    }
    
    // maybe support passing in array as well as dict?
    //if (JSONParameters && ([JSONParameters isKindOfClass:[NSDictionary class]] || [JSONParameters isKindOfClass:[NSArray class]]) && [JSONParameters count] > 0)
    
    if (JSONParameters && JSONParameters.count > 0) {
        NSData *bodyData = [NSJSONSerialization dataWithJSONObject:JSONParameters options:0 error:&serializationError];
        if (!bodyData) {
            if (failure) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wgnu"
                dispatch_async(self.completionQueue ?: dispatch_get_main_queue(), ^{
                    failure(nil, serializationError);
                });
#pragma clang diagnostic pop
            }
            
            return nil;
        }
        
        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        request.HTTPBody = bodyData;
    }
    
    __block NSURLSessionDataTask *dataTask = nil;
    dataTask = [self dataTaskWithRequest:request completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
        if (error) {
            if (failure) {
                failure(dataTask, error);
            }
        } else {
            if (success) {
                success(dataTask, responseObject);
            }
        }
    }];
    
    
    [dataTask resume];
    
    return dataTask;
}

@end