-(NSString*)DataTOjsonString:(id)object

{

    NSString *jsonString = nil;

    NSError *error;

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:object

                                                       options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string

                                                         error:&error];

    if (! jsonData) {

        NSLog(@"Got an error: %@", error);

    } else {

        jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

    }

    return jsonString;

}