Facebook request for friends returns 0 friends when session is open

Question

I am building an iOS application that is connected to Facebook. I got most of the Facebook related code (pretty much copied all of it) from the TokenCacheHowTo project. I have run into two problems, one which had a simple fix, but I think may be causing my second problem.

At first the login wasn't persisting. I had copied all the code from TokenCacheHowTo, so I was confused why and looked for a solution. Eventually I found this question and it said that if I removed @[@"basic_info"] from the permissions parameter it would work. And it did. I am still confused as to why it would work. Note: I removed @[@"basic_info"] from the openSessionWithAllowLoginUI method in my app delegate.

My problem now is that I want a list of the users friends, so I do the following request in the app delegate.

FBRequest* friendsRequest = [FBRequest requestForMyFriends];
[friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
                                              NSDictionary* result,
                                              NSError *error) {
    NSLog(@"Under");
    NSArray* friends = [result objectForKey:@"data"];
    NSLog(@"Found: %i friends", friends.count);
}];

This code outputs Found: 0 friends within my app delegate, but if I put the code in the same place in TokenCacheHowTo it outputs Found: X friends where X is my actual number of friends. This is confusing to me because I am able to get the users information such as their id and name from Facebook and store it on my server.

I realize that there is probably a simple solution to this but I don't have a good grasp of the Facebook SDK yet and I'm stuck.

Answer 1

Try this as working fine for me and Ensure about the Permissions like

NSArray *array = [NSArray arrayWithObjects:@"user_friends", nil];

and then fetch all the friend

-(void)getFriendList   {
    FBRequest* friendsRequest = [FBRequest requestWithGraphPath:@"me?fields=friends.fields(first_name,last_name)" parameters:nil HTTPMethod:@"GET"];
    [friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
                                                  NSDictionary* result,
                                                  NSError *error) {
        NSDictionary* friendsDic = [result objectForKey:@"friends"];
        NSArray *friends = [friendsDic objectForKey:@"data"];
        for (NSDictionary *friend in friends) {
            NSLog(@"firstname %@",friend[@"first_name"]);
            NSLog(@"last name %@",friend[@"last_name"]);
        }
     }];
}

Answer 2

Nothing wrong with your code. I've used the same code which you used above and I got x friends list. But my permission is declared as below

FBSession.activeSession = [[FBSession alloc] initWithPermissions:[NSArray arrayWithObjects:@"user_about_me", @"email",@"user_birthday", nil]];

Note: I want email id and birthday from users that why my permissions include that fields. And It should be declared before authentication, then only sessions kept this permission as it is.