how to parse the json responseString from webservice - iphone

Question

I am connecting to webservices using json.
I connected using nsurl connection. I got json response string ... i need to parse it.
When i try to parse it i am getting following error:
dyld: Symbol not found: _CFXMLNodeGetInfoPtr
here is relevant source code:
// Using NSURLConnection
- (void)viewDidLoad
{
[super viewDidLoad];
dataWebService = [[NSMutableData data] retain];
NSMutableURLRequest *request = [[NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"https://www.googleapis.com/customsearch/v1?key=AIzaSyDzl0Ozijg2C47iYfKgBWWkAbZE_wCJ-2U&cx=017576662512468239146:omuauf_lfve&q=lectures&callback=handleResponse"]]retain];
NSURLConnection *myConnection = [NSURLConnection connectionWithRequest:request delegate:self];
[myConnection start];
[super viewDidLoad];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[dataWebService setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[dataWebService appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *responseString = [[NSString alloc] initWithData:dataWebService encoding:NSUTF8StringEncoding];
NSLog(#"Response: %#",responseString);
[responseString release];
[dataWebService release];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"Error during connection: %#", [error description]);
}
// Parse JSON
- (void)requestCompleted:(ASIHTTPRequest *)request
{
NSString *responseString = [request responseString];
NSDictionary *dictionary = [responseString JSONValue];
NSDictionary *dictionaryReturn = (NSDictionary*) [dictionary objectForKey:#"request"];
NSString *total = (NSString*) [dictionaryReturn objectForKey:#"totalResults"];
NSLog(#"totalResults: %#", total);
int count = [[dictionaryReturn objectForKey:#"count"] intValue];
NSLog(#"count: %d", count);
}

Answer 1

The JSON response string is not a valid one, that's the reason your are getting the error.
Use the following link to check the if the JSON string, sent as response from Web services is valid one or not
JSONLint