JSON parser doesn't work objective c - ios

Question

Some days ago I tryid to read and parse data from server. But today it doesn't work. What can be wrong?
Here I out my method:
-(void) getDataFromServer
{
act = #"linkinginit";
deviceid = #"1xyhgjs";
fullRequest = [NSString stringWithFormat:#"http://app.ivson.by/?act=%#&deviceid=%#", act, deviceid];
NSLog(#"%#", fullRequest);
NSURL *url = [NSURL URLWithString:fullRequest];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
NSData *returnData = [NSURLConnection sendSynchronousRequest: theRequest returningResponse: nil error: nil];
NSString *strData = [[NSString alloc]initWithData:returnData encoding:NSUTF8StringEncoding];
NSRange searchedRange = NSMakeRange(0, [strData length]);
NSLog(#"Data from server = %#", strData);
NSString *json = strData;
// NSString *json = #"{\"code\":200,\"serviceID\":\"53d22b10e46a5\",\"sender\":1,\"hasPair\":0}";
NSData *jsonData = [json dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
id obj = [NSJSONSerialization JSONObjectWithData:jsonData
options:0
error:&error];
if (obj) {
NSAssert([obj isKindOfClass:[NSDictionary class]], #"Expected a dictionary");
NSDictionary *dictObj = (NSDictionary *)obj;
NSNumber *code = dictObj[#"code"];
NSLog(#"code:", code);
NSString *serviceId = dictObj[#"serviceID"];
NSLog(#"serviceId:", serviceId);
NSNumber *sender = dictObj[#"sender"];
NSLog(#"sender:",sender);
NSNumber *hasPair = dictObj[#"hasPair"];
NSLog(#"hasPair:", hasPair);
} else {
NSLog(#"Failed to parse JSON: %#", [error localizedDescription]);
}
}
And output is like this. I need to have all variables(code, serviceId, sender and hasPair) separate.
2014-07-28 11:46:41.640 Nanny[1445:11303] http://app.ivson.by/? act=linkinginit&deviceid=1xyhgjs
2014-07-28 11:46:41.923 Nanny[1445:15b03] ADDRESPONSE - ADDING TO MEMORY ONLY: http://app.ivson.by/?act=linkinginit&deviceid=1xyhgjs
2014-07-28 11:46:41.924 Nanny[1445:11303] Data from server = {"code":200,"serviceid":"53d60c7cc35f1","sender":1,"hasPair":0}
2014-07-28 11:46:41.924 Nanny[1445:11303] code:
2014-07-28 11:46:41.925 Nanny[1445:11303] serviceId:
2014-07-28 11:46:41.925 Nanny[1445:11303] sender:
2014-07-28 11:46:41.925 Nanny[1445:11303] hasPair:
Thank you.

Answer 1

in NSLog, you're not passing type of arguments. Try this
if (obj) {
NSAssert([obj isKindOfClass:[NSDictionary class]], #"Expected a dictionary");
NSNumber *code = obj[#"code"];
NSLog(#"code: %#", code);
NSString *serviceId = obj[#"serviceID"];
NSLog(#"serviceId: %#", serviceId);
NSNumber *sender = obj[#"sender"];
NSLog(#"sender: %#",sender);
NSNumber *hasPair = obj[#"hasPair"];
NSLog(#"hasPair: %#", hasPair);
} else {
NSLog(#"Failed to parse JSON: %#", [error localizedDescription]);
}