iOS Facebook SDK - get list of Friends connected with App

Question

I am trying to get a list of all my Facebook Friends, who are using the App I am getting the list of all friends, but how do I filter all the friends which are using the app?

    FBRequest* friendsRequest = [FBRequest requestForMyFriends];
    [friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
                                                  NSDictionary* result,
                                                  NSError *error) {
        NSArray* friends = [result objectForKey:@"data"];
        NSLog(@"Found: %i friends", friends.count);
        for (NSDictionary<FBGraphUser>* friend in friends) {
            NSLog(@"I have a friend named %@ with id %@", friend.name, friend.id);

        }
        NSArray *friendIDs = [friends collect:^id(NSDictionary<FBGraphUser>* friend) {
            return friend.id;
        }];

    }];

Thanks.

Answer 1

Thats the way how it works with iOS5+

FBRequest* friendsRequest = [FBRequest requestWithGraphPath:@"me/friends?fields=installed" parameters:nil HTTPMethod:@"GET"];
        [friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection,
                                                      NSDictionary* result,
                                                      NSError *error) {
            NSArray* friends = [result objectForKey:@"data"];
            NSLog(@"Found: %i friends", friends.count);
            for (NSDictionary<FBGraphUser>* friend in friends) {
                NSLog(@"I have a friend named %@ with id %@", friend.name, friend.id);

            }
            NSArray *friendIDs = [friends collect:^id(NSDictionary<FBGraphUser>* friend) {
                return friend.id;
            }];

     }];

Answer 2

This can be used for latest Facebook API 3.2 ,

[FBRequestConnection startForMyFriendsWithCompletionHandler:
     ^(FBRequestConnection *connection, id<FBGraphUser> friends, NSError *error)
     {
         if(!error){
             NSLog(@"results = %@", friends);
         }
     }
];