Parse JSON using NSURLConnection - ios

Question

I am using Bing Search API and able to successfully parse the xml but not JSON.Below is the code to both parse xml and JSON,when I nslog the output of the JSON it shows "null" I don't know how to proceed from here.
-(void)searchBing:(NSString *)text{
//NSString *query1 = #"San Francisco Baseball";
NSString *query = [NSString stringWithFormat: #"'%#'",text];
//NSString *query = query1;
NSString *format = #"atom";
NSString *market = #"'en-us'";
//NSInteger top = 2;
NSMutableString *fullURL = [NSMutableString stringWithCapacity:256];
[fullURL appendString:URL];
[fullURL appendFormat:#"Web?$format=%#", format];
[fullURL appendFormat:#"&Query=%#",
[query stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
[fullURL appendFormat:#"&Market=%#",
[market stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
// [fullURL appendFormat:#"&$top=%d", top];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:
[self getRequest:fullURL] delegate:self];
if (connection)
{
NSLog(#"Connection established");
}
else
{
NSLog(#"Connection failed");
}
}
Below where am parsing both xml(successful) and JSON(unsuccessful)
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// The request is complete and data has been received
// You can parse the stuff in your instance variable now
// convert to JSON
NSLog(#"Finished loading: Received %d bytes of data",[self.responseData length]);
NSXMLParser *parser = [[NSXMLParser alloc] initWithData: self.responseData];
[parser setDelegate: self];
[parser parse];
NSLog(#"XMl == %#",parser);
NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:self.responseData options:kNilOptions error:&myError];
NSLog(#"json data = %#",res);//getting null
}
Am using Base_64 encoding and to all viewers nothing wrong with query because getting correct information via xml parser.But I want response in JSON.
Structure sample
{
"SearchResponse":{
"Version":"2.2",
"Query":{
"SearchTerms":"testign"
},
"Spell":{
"Total":1,
"Results":[
{
"Value":"testing"
}
]
},
"Web":{
"Total":5100,
"Offset":0,
"Results":[
{
"Title":"Testign part 2 - Tiernan OTooles Programming Blog",
"Description":"If this works, it means nothing really, but i have managed to build a .TEXT blog posting app. could be handy if i move my main blog to .TEXT, which i am thinking about..",
"Url":"http:\/\/weblogs.asp.net\/tiernanotoole\/archive\/2004\/09\/24\/233830.aspx",
"DisplayUrl":"http:\/\/weblogs.asp.net\/tiernanotoole\/archive\/2004\/09\/24\/233830.aspx",
"DateTime":"2008-10-21T05:08:05Z"
}
]
}
}
}

Answer 1

From your post:
NSXMLParser *parser = [[NSXMLParser alloc] initWithData: self.responseData];
.
.
.
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:self.responseData options:kNilOptions error:&myError];
It looks like you're trying to use the same data as XML and JSON. You can't do that. The data returned from the server is in one form OR the other. It won't be both.