JSON serialisation in AFNewtorking is failing - iphone

Question

I am trying to perform GET requests that returns JSON string from a web-service using AFNetworking but I am receiving the following error from AFNetworking 1.3.3
#"JSON text did not start with array or object and option to allow fragments not set."
and here is my JSON which is a valid JSON string , I used many online validators to make sure
"{\"ErrorCode\":0,\"VerCode\":\"8595\"}"
AFNetworking Code that is not working
NSString *urlString = [BASE_URL stringByAppendingString:paramseters];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:BASE_URL]];
NSMutableURLRequest *request = [httpClient requestWithMethod:#"GET"
path:urlString
parameters:nil];
AFJSONRequestOperation *operation =
[AFJSONRequestOperation JSONRequestOperationWithRequest:request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSDictionary *jsonDic = (NSDictionary *)JSON;
success(jsonDic);
}
failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
CPError *cpError = [CPError CPErrorWithErrorCode:error.code errorDesc:error.localizedDescription];
failure(cpError);
}];
[operation start];
I was able to parse the JSON into NSDictionary using the below code but I want to be able to use AFNetworking in order to make use of it's built in features , is there a way to make AFNetworking understands my JSON string ?
NSURL *url = [NSURL URLWithString:#"http://103.1.173.60/ims-mobile-wcf/MobileWCF.svc/AddUpdateMobileClient/123123/443da4444/1/1"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:120];
[request setHTTPMethod:#"GET"];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSLog(#"%#",connectionError);
NSError *error = nil;
NSString *JSONString = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
NSDictionary *JSONDictionary =
[NSJSONSerialization JSONObjectWithData: [JSONString dataUsingEncoding:NSUTF8StringEncoding]
options: NSJSONReadingMutableContainers
error: &error];
}];

Answer 1

I'll take a stab and say the reason is that the response string appears to be in quotes, if this is the case then the error is very clear - the Fragments option is not set. Do a a global search for "JSONReadingOptions" and you'll find the place in AFNetworking where the response is serialized into a foundation object (in version 1.3 it's AFJsonRequestOperation line 79, it looks like your using 2.0) is basically exactly what you are doing manually. If you do as arturdev suggests and set the reading options to be NSJSONReadingAllowFragments it should work.

Answer 2

Try:
AFJSONRequestOperation *operation = ...
operation.JSONReadingOptions = NSJSONReadingAllowFragments;
[operation start];

Answer 3

This is wrong:
NSError *error = nil;
NSString *JSONString = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
NSDictionary *JSONDictionary =
[NSJSONSerialization JSONObjectWithData: [JSONString dataUsingEncoding:NSUTF8StringEncoding]
options: NSJSONReadingMutableContainers
error: &error];
JSONObjectWithData: does not return an NSString, it returns an object: NSArray or NSDictionary, in your case a NSDictionary
Just use:
NSError *error = nil;
NSDictionary *resultDictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];