Facebook curl like post request using open graph - iphone

Question

I want to create the like button in my iOS app by using
curl -X POST \
-F 'access_token=USER_ACCESS_TOKEN' \
-F 'object=OG_OBJECT_URL' \
https://graph.facebook.com/[User FB ID]/og
.likes given by Open graph api.
For it I have made post request i.e.
NSString *stringurl=[NSString stringWithFormat:#"{access_token=AAAE08AxGmwghghghOWAxMZBz6jZAaRTUYTRMakJln3VdAeUju6E6tFn2I9feY5wtGatTm2KIgXoXYFZB0pTPQt2Oj0sNaRuX3AZDZD}&{object=http://www.google.com}&https://graph.facebook.com/100002097766610/og.likes"];
NSURL *url = [NSURL URLWithString: stringurl];
NSMutableURLRequest *request1 = [NSMutableURLRequest requestWithURL:url];
[request1 setURL:url];
[request1 setHTTPMethod:#"POST"];
[request1 setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSError *error;
NSURLResponse *response;
NSData *data = [NSURLConnection sendSynchronousRequest:request1 returningResponse:&response error:&error];
NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"string..:%#",string);
But I am getting empty string. May be I am making wrong url string. If any one know that how to make the curl post request. Please give me some idea.
Thanks to all.

Answer 1

I attached some codes below:
Body data of Http POST request should located in 'Body', So I used 'setHttpBody:' method.
NSString *userId = #"Your ID Facebook ID";
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"https://graph.facebook.com/%#/og.likes", userId]];
NSMutableURLRequest *request1 = [NSMutableURLRequest requestWithURL:url];
[request1 setURL:url];
[request1 setHTTPMethod:#"POST"];
NSString *body=[NSString stringWithFormat:#"access_token=YOUR_APP_ACCESS_TOKEN&object=OG_OBJECT_URL"];
[request1 setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];
NSError *error;
NSURLResponse *response;
NSData *data = [NSURLConnection sendSynchronousRequest:request1 returningResponse:&response error:&error];
NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"string..:%#",string);