objective c - Manipulating Facebook/JSON data -


i'm trying handle facebook json data , transform nsmutable dictionary, i'm getting (null) when try print data. although when try count, number.

user_likes nsmutabledictionary globally defined. i'm getting (null) on line:

nslog(@"user likes: %@", user_likes);

this code:

nsstring *query =  @"select page_id, type page_fan uid = me() ";  // set query parameter  nsdictionary *queryparam = @{ @"q": query };  // make api request uses fql  [fbrequestconnection startwithgraphpath:@"/fql"  parameters:queryparam  httpmethod:@"get"  completionhandler:^(fbrequestconnection *connection,  id results,  nserror *error) {  if (error) {  nslog(@"error: %@", [error localizeddescription]);  } else {   user_likes = [nsjsonserialization jsonobjectwithdata:results options:kniloptions error:&error];  nslog(@"user likes: %@", user_likes);   nsinteger* n_user_likes = [results count];  nsinteger* n_user_likes2 = [user_likes count];   nslog(@"n user likes %qi", n_user_likes);  nslog(@"n user likes2 %qi", n_user_likes2);   id val = nil;  id values = [[user_likes allkeys] objectatindex:0 ];  nslog(@"values id %@", values);

when print results, lot of data facebook, sample of it:

data =     (                 {             "page_id" = 253370381511811;             type = "public figure";         },                 {             "page_id" = 148389618201;             type = "local business";         },                 {             "page_id" = 213631462169238;             type = community;         },                 {             "page_id" = 162297750451425;             type = "non-profit organization";         },                 {             "page_id" = 503620106320217;             type = "media/news/publishing";         },

you can't directly 

user_likes = [nsjsonserialization jsonobjectwithdata:results options:kniloptions error:&error];

you need first create dictionary data in results this:

    nsdictionary *dictionary = [nsdictionary dictionarywithjsondata:results];      user_likes = [nsstring stringwithformat:@"%d",[[dictionary objectforkey:@"value_of_the_likes"] intvalue]];     nslog(@"%@",user_likes);     nslog(@"%@",dictionary);

edit:

please, create class project , import in class need use this. 

#import <foundation/foundation.h>  @interface nsdictionary (jsonextensions)  +(nsdictionary*)dictionarywithjsondata:(nsdata*)data; -(nsdata*)jsonvalue; -(nsstring*)jsonstring;  @end  @implementation nsdictionary(jsonextensions)  +(nsdictionary*)dictionarywithjsondata:(nsdata*)data{     nserror *error = nil;      nsdictionary *result = [nsjsonserialization jsonobjectwithdata:data options:kniloptions error:&error];     if(error){         nslog(@"%@",error);         return nil;     };     return result; }  -(nsdata*)jsonvalue{     nserror *error = nil;      nsdata *result = [nsjsonserialization datawithjsonobject:self options:kniloptions error:&error];     if(error){         nslog(@"%@",error);         return nil;     };      return result; }  -(nsstring*)jsonstring{     return [[nsstring alloc] initwithdata:self.jsonvalue encoding:nsutf8stringencoding]; }  @end

hope can you.


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