Question

I’m developing an iOS application with latest SDK and XCode 4.2.

To parse JSON response, I’m using this JSON parser: https://github.com/stig/json-framework/

I receive this JSON string from web service (this is console log):

2012-02-16 08:21:59.525 JReader[558:207] {"rules": [
{ "id_categoria": "3","categoria": "cat03" },{ "id_categoria": "2","categoria": "cat02" }
     ]
   }

JSON parser parses to a NSArray with these two elements (this is console log):

2012-02-16 08:22:04.910 JReader[558:207] {
    categoria = "cat03";
    "id_categoria" = 3;
}

2012-02-16 08:22:04.911 JReader[558:207] {
    categoria = "cat02";
    "id_categoria" = 2;
}

Objective-C code to parse is:

- (IBAction)go:(id)sender
{
    parser = [[SBJsonParser alloc] init];
    NSURLRequest* request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://XXX"]];

    NSData* response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    NSString *json_string = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];

    // parse the JSON response into an object
    // Here we're using NSArray since we're parsing an array of JSON status objects
    NSLog(@"%@", json_string);
    NSDictionary* datos = [parser objectWithString:json_string error:nil];
    NSArray* data = [datos objectForKey:@"rules"];
    for (int i = 0; i < data.count; i++)
    {
        NSLog(@"%@", [data objectAtIndex:i]);
    }

}

I expect a NSDictionary with these pairs:

  key           value
============  ============
categoria         cat03
id_categoria        3

MY QUESTIONS:

1. Is there any error on json string?

2. Why is it parsing this way?

It is my first time parsing JSON, so I don’t know if it is parsing well.

Answer 1

There is nothing wrong with that. It’s an array of dictionaries inside a dictionary with the key rules. That’s exactly what you got.