creating JSON format in Objective C

Question

For an application i want to create a JSON in format as mentioned below,

\"Students\" : {
    \"results\": {
        \"Grade1\": {
            \"studentresul         


        

Answer 1

    check this code-
  NSMutableDictionary *students=[NSJSONSerialization JSONObjectWithData:webData        options:0 error:nil];
      for (NSDictionary *dictionofstudents in students)
      {
           NSMutableDictionary *results=[dictionofstudents objectForKey:@"results"];
           for (NSDictionary *dictionofresults in results)
           {
               NSMutableDictionary *grade1=[dictionofresults objectForKey:@"Grade1"];
               for (NSDictionary *dictionofgrade1 in grade1) 
               {
                   NSString *studentresult=[dictionofgrade1 objectForKey:@"studentresult"];
                   NSString *marksheet=[dictionofgrade1 objectForKey:@"marksheet"];
                   [arrayofstudentresult addObject:studentresult];
                   [arrayofmarksheet addObject:marksheet];
               }
               NSString *ID=[dictionofresults objectForKey:@"ID"];
               NSString *name=[dictionofresults objectForKey:@"Name"];
              [arrayofID addObject:ID];
              [arrayofname addObject:name];
           }
      }