Facebook friend's wall posting through ID - ios

Question

I am trying to post on a Facebook friend's wall, I tried these two methods but none work:
1.
//post on wall
NSMutableDictionary *variables = [[NSMutableDictionary alloc]initWithCapacity:1];
[variables setObject:#"v" forKey:#"message"];
[graphref doGraphPost:[NSString stringWithFormat:#"1389799421/feed"] withPostVars:variables];
//post on wall
2.
[_facebook requestWithGraphPath:#"1389799421/feed"
andParams:[NSMutableDictionary dictionaryWithObject:#"test wall post" forKey:#"message"]
andHttpMethod:#"POST"
andDelegate:self];
...and I can't understand why!! On the facebook website I have added the bundle and the permissions.

Answer 1

I am trying to post on a Facebook friend's wall
Facebook recently announced in the developer blog, that posting to another user’s wall through the API will not be possible any more from Feb 2013 on:
Removing ability to post to friends walls via Graph API
We will remove the ability to post to a user's friends' walls via the Graph API. Specifically, posts against [user_id]/feed where [user_id] is different from the session user, or stream.publish calls where the target_id user is different from the session user, will fail. If you want to allow people to post to their friends' timelines, invoke the feed dialog.
So I think it’s pretty useless starting to develop a feature like that now.

Answer 2

First off, you have to open your session with publish permissions. Specifically, you must request the publish_stream permission.
NSArray * permissions = [[NSArray alloc] initWithObjects:#"publish_stream", nil];
return [FBSession openActiveSessionWithPublishPermissions:permissions defaultAudience:FBSessionDefaultAudienceFriends allowLoginUI:YES completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
[self sessionStateChanged:session
state:status
error:error];
}];
If you have publish permissions, you can create and send the request. Make sure you include the access_token as one of the parameters. If you don't, you will get authentication errors.
NSDictionary * postParameters = [NSDictionary dictionaryWithObjectsAndKeys:_textView.text, #"message", FBSession.activeSession.accessToken, #"access_token", nil];
NSString * graphPath = #"ID_NUMBER_HERE/feed";
FBRequest * request = [FBRequest requestWithGraphPath:graphPath parameters:postParameters HTTPMethod:#"POST"];
[[request initWithSession:FBSession.activeSession graphPath:graphPath parameters:postParameters HTTPMethod:#"POST"] startWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
NSLog(#"Successful posted to Facebook");
}];
}