how to post with json - iphone

Question

Hello I want to set following key Values for Dictionary
{
application = {
id = 136664723060869;
name = Iphoneapp;
};
caption = "bit.ly";
comments = {
count = 2;
data = (
{
"created_time" = "2011-06-14T07:39:45+0000";
from = {
id = 100001507678574;
name = "Widevision Dev";
};
id = "100001507678574_164163733643881_1822049";
likes = 1;
message = hi;
},
{
"created_time" = "2011-06-14T08:17:31+0000";
from = {
id = 100001507678574;
name = "Widevision Dev";
};
id = "100001507678574_164163733643881_1822143";
message = hmmm;
}
);
};
I want to post comments ={ data ={ id = , name = }}
I used following code for this
NSMutableDictionary *variables = [NSMutableDictionary dictionaryWithCapacity:4];
[variables setObject:#"Good Afternoon" forKey:#"message"];
NSLog(#"%#",variables);
FbGraphResponse *fb_graph_response = [fbGraph doGraphPost:#"id/comments" withPostVars:variables];
NSLog(#"postMeFeedButtonPressed: %#", fb_graph_response.htmlResponse);
But this not working....How can I post message in comment object

Answer 1

Please check the code below:
NSMutableDictionary *comments = [[NSMutableDictionary alloc] init];
NSMutableDictionary *data = [[NSMutableDictionary alloc] init];
NSMutableDictionary *from = [[NSMutableDictionary alloc] init];
[from setObject:#"100001507678574" forKey:#"id"];
[from setObject:#"Widevision Dev" forKey:#"name"];
[data setObject:from forKey:#"from"];
[comments setObject:data forKey:#"comments"];
NSLog(#"%#",comments);
FbGraphResponse *fb_graph_response = [fbGraph doGraphPost:#"id/comments" withPostVars:comments];