How to use NSJSONSerialization

Question

I have a JSON string (from PHP\'s json_encode() that looks like this:

[{\"id\": \"1\", \"name\":\"Aaa\"}, {\"id\": \"2\", \"name\":\"Bbb\"}]
         


        

Answer 1

The following code fetches a JSON object from a webserver, and parses it to an NSDictionary. I have used the openweathermap API that returns a simple JSON response for this example. For keeping it simple, this code uses synchronous requests.

   NSString *urlString   = @"http://api.openweathermap.org/data/2.5/weather?q=London,uk"; // The Openweathermap JSON responder
   NSURL *url            = [[NSURL alloc]initWithString:urlString];
   NSURLRequest *request = [NSURLRequest requestWithURL:url];
   NSURLResponse *response;
   NSData *GETReply      = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
   NSDictionary *res     = [NSJSONSerialization JSONObjectWithData:GETReply options:NSJSONReadingMutableLeaves|| NSJSONReadingMutableContainers error:nil];
   Nslog(@"%@",res);