评论从Facebook的API与graphicsAPI与客观 – C

我正在试图用api来获得facebook贴子的评论。 现在我有以下的方法。

+(NSArray *)getCommentsWithParam:(NSString *)Param { NSString *request = [NSString stringWithFormat:@"https://graph.facebook.com/comments/?ids=%@",Param]; NSLog(@"request is %@",request); NSString *vfk = [NSString stringWithFormat:@"comments.data"]; return [[self executeGenkFetch:request] valueForKey:vfk]; } 

executeGenkFetch只是parsingjson，并给我一个NSDictionary的结果。 但现在当我读到这样的结果。

 -(void)getComments{ NSArray *comments = [GenkData getCommentsWithParam:_commentsUrl]; NSLog(@"Comments are %@", comments); } 

我总是得到（null）。 这是json的样子。

 { "http://www.krcgenk.be//nl/nieuws/show/krc-genk-speelt-1-1-gelijk-op-vfb-stuttgart/1329": { "comments": { "data": [ { "id": "412008348889230_2723627", "from": { "name": "Put Patrick", "id": "1090951059" }, "message": "Proficiat mannen", "can_remove": false, "created_time": "2013-02-15T00:10:12+0000", "like_count": 4, "user_likes": false }, { "id": "412008348889230_2723878", "from": { "name": "Benny Froyen", "id": "1095529244" }, "message": "Knap resultaat voor Genk. Alles blijft open voor de terugwedstrijd in Genk. Leuk!", "can_remove": false, "created_time": "2013-02-15T02:25:51+0000", "like_count": 1, "user_likes": false } ], "paging": { "next": "https://graph.facebook.com/412008348889230/comments?limit=25&offset=25&__after_id=412008348889230_2725492" } } } }