How to pass dictionary in JSON , objective c - objective-c

Question

I have to pass dictionary(hostListItemDict) to a server
BASE_URL : http:/123.com/PHP/
API_GET_FILE_NAME : server.php
Main File
-(void)toSendValuesToServer
{
[MiddlewareServerUtilityData SendDatasToServer:hostListItemDict ServerBaseUrl:BASE_URL andCompletion:^(NSError *error, id data) {
if (!error)
{
//NSLog(#"Data%#",data);
NSString *resourseType = [data objectForKey:#"success_msg"];
NSString *mess = [data objectForKey:#"msg"];
if ([resourseType.lowercaseString isEqualToString:#"success_msg"])
{
NSLog(#"Transaction uploaded successfully, with message %#",mess);
}
else
{
NSLog(#"###Error sending transaction,data = %#",data);
}
}
else
{
NSLog(#"#error uploading data %#",error.localizedDescription);
}
}];
}
Server.h File
typedef void (^GFWebServiceHandler)(NSError *error, id data);
#interface MiddlewareServerUtilityData : NSObject
+(void)SendDatasToServer:(NSDictionary *)hostListItemDict ServerBaseUrl:(NSString *)BaseUrl andCompletion:(GFWebServiceHandler)completion;
Server.m
#import "MiddlewareServerUtilityData.h"
#implementation MiddlewareServerUtilityData
+(void)SendDatasToServer:(NSDictionary *)hostListItemDict ServerBaseUrl:(NSString *)BaseUrl andCompletion:(GFWebServiceHandler)completion
{
NSString *strUrl = [NSString stringWithFormat:#"%#/%#",BaseUrl,API_GET_FILE_NAME];
[self createGETRequestWithParams:hostListItemDict urlString:strUrl andCompletion:completion];
}
+(AFHTTPRequestOperationManager *)createPOSTRequestWithParams:(NSDictionary *)hostListItemDict urlString:(NSString *)url_str andCompletion:(GFWebServiceHandler)completion
{
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
AFJSONResponseSerializer *responseSerializer = [AFJSONResponseSerializer serializer];
responseSerializer.removesKeysWithNullValues = YES;
manager.responseSerializer = responseSerializer;
responseSerializer.acceptableContentTypes = [NSSet setWithObjects:#"application/json", #"text/json", #"text/javascript", #"text/html", nil];
NSString *strEncodedUrl = [url_str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[manager POST:strEncodedUrl parameters:hostListItemDict success:^(AFHTTPRequestOperation *operation, id responseObject) {
completion(nil,responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
completion(error,nil);
}];
return manager;
}
+(AFHTTPRequestOperationManager *)createGETRequestWithParams:(NSDictionary *)hostListItemDict urlString:(NSString *)url_str andCompletion:(GFWebServiceHandler)completion
{
///strUrl = BASE_URL;
NSString *strUrlWithParams = [self stringByAppendingParams:hostListItemDict toUrlString:url_str];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
AFJSONResponseSerializer *responseSerializer = [AFJSONResponseSerializer serializer];
responseSerializer.removesKeysWithNullValues = YES;
manager.responseSerializer = responseSerializer;
//manager.responseSerializer = [AFHTTPResponseSerializer serializer];
responseSerializer.acceptableContentTypes = [NSSet setWithObjects:#"application/json", #"text/json", #"text/javascript", #"text/html", nil];
NSString *strEncodedUrl = [strUrlWithParams stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[manager GET:strEncodedUrl parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
completion(nil,responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
completion(error,nil);
}];
return manager;
}
+(NSString *)stringByAppendingParams:(NSDictionary *)hostListItemDict toUrlString:(NSString *)url_str
{
if (url_str.length > 0) {
NSMutableString *strUrlWithParams = [NSMutableString stringWithString:url_str];
if (hostListItemDict .count > 0) {
///Append ? for first param
[strUrlWithParams appendString:#"?"];
for (id paramName in [hostListItemDict allKeys]) {
///Get value associated to param name
id paramVal = [hostListItemDict objectForKey:paramName];
///Append Param
[strUrlWithParams appendFormat:#"%#=%#&",paramName,paramVal];
}
///Remove & from last
NSRange lastCharRange = NSMakeRange(strUrlWithParams.length - 1, 1);
[strUrlWithParams deleteCharactersInRange:lastCharRange];
}
return strUrlWithParams;
}
return nil;
}
error uploading data The data couldn’t be read because it isn’t in the correct format.