How to send data in JSON to web via AFNetWorking 2.0?

Question

I need to send my login and pass to web server in data variable in JSON via POST I tried :

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *params = @{@"email" : email, @"password" : pass };
manager.requestSerializer = [AFJSONRequestSerializer serializer];
[manager POST:URLString parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
} failure:
 ^(AFHTTPRequestOperation *operation, NSError *error) {
     NSLog(@"Error: %@", error); }];

but have:

Data = "<null>";
Message = "unexpected end of JSON input";
Result = fail;

Answer 1

You need to convert your dictionary into a JSON object. Atm sending a dictionary via the params will not work hence your error.

Consider using the SBJson library which can convert your dictionary into a JSON string object and can also parse JSON strings into dictionaries again.

SBJson framework

Then you simply include the header files like so:

#import "SBJson.h

And then you will be able to use the category method on your dictionaries like so:

NSDictionary *params = @{@"email" : email, @"password" : pass };
NSString *jsonString = [params JSONRepresentation];
//and then you send the jsonString as the params