iOS-error in parsing the data - ios

Question

In my app, I am parsing the data using JSON
NSString * urlString=[NSString stringWithFormat:#"http://userRequest?userid=bala#gmail.com&latitude=59.34324&longitude=23.359257"];
NSURL * url=[NSURL URLWithString:urlString];
NSMutableURLRequest * request=[NSMutableURLRequest requestWithURL:url];
NSError * error;
NSURLResponse * response;
NSData *data=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString * outputData=[[NSString alloc]initWithData:data encoding:NSASCIIStringEncoding];
NSLog(#"%#",outputData);
SBJsonParser *jsonParser = [SBJsonParser new];
NSDictionary *jsonData = (NSDictionary *) [jsonParser objectWithString:outputData error:nil];
NSLog(#"%#",jsonData);
NSInteger success = [(NSNumber *) [jsonData objectForKey:#"success"] integerValue];
After this code executes, In my log it is printed as
({
latitude = "0.000000000000000";
longitude = "0.000000000000000";
username = sunil;
},
{
latitude = "80.000000000000000";
longitude = "30.000000000000000";
username = arun;
})
But while running, the app crashes, as
'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x910d8d0'

Answer 1

I think your problem is, that jsonParser objectWithString returns an array with dictionaries in it not dictionaries itself.
Try the following:
NSArray *jsonData = (NSArray *) [jsonParser objectWithString:outputData error:nil];
for(NSDictionary *dict in jsonData) {
NSLog(#"%#",dict);
}
Does that work for you ?

Answer 2

Your reponse is NSArray which contains NSDictionary. So frst get dictionary from array then access value. Also Your json not look like correct.
for (NSDictionary *dict in responseArray) {
double latitude = [dict[#"latitude"]doubleValue];
double longitude = [dict[#"latitude"] longitude];
NSString* name = dict[#"username"];
}

Answer 3

1. First of all you are getting NSArray in JSON
JSON Starts with "(" means NSArray
JSON Starts with "{" means NSDictionary
Here you are getting NSArray which has collection of NSDictionary,
{
latitude = "0.000000000000000";
longitude = "0.000000000000000";
username = sunil;
},...
2."success" key is not present in the JSON..
Fix
NSArray *jsonData = (NSArray *) [jsonParser objectWithString:outputData error:nil];
If([jsonData count]>0){
// Has some data
// Iterate NSDictionary and get data here
}
else{
// No Data
}

Answer 4

some where you are getting data from nsarray with using some object key. that key is invalid to fetching data from array