Facebook iOS SDK - get friends list

Question

Using the Facebook iOS SDK, how can I get an NSArray of all my friends and send them an invitation to my app? I am specifically looking for the graph path to get all of the friends.

Solution 1

With Facebook SDK 3.0 you can do this:

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

Solution 2

Here is a more complete solution:

In your header file:

@interface myDelegate : NSObject <UIApplicationDelegate, FBSessionDelegate, FBRequestDelegate> {
    Facebook *facebook;
    UIWindow *window;
    UINavigationController *navigationController;

    NSArray *items; // to get facebook friends
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController;

@property (nonatomic, retain) Facebook *facebook;
@property (nonatomic, retain) NSArray *items;
@end

Then in your implementation:

@implementation myDelegate

@synthesize window;
@synthesize navigationController;
@synthesize facebook;
@synthesize items;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

...


    facebook = [[Facebook alloc] initWithAppId:@"YOUR_APP_ID_FROM_FACEBOOK" andDelegate:self];

    [facebook requestWithGraphPath:@"me/friends" andDelegate:self];

    return YES;
}

Then you need at least the following delegate protocol method:

- (void)request:(FBRequest *)request didLoad:(id)result {
    //ok so it's a dictionary with one element (key="data"), which is an array of dictionaries, each with "name" and "id" keys
    items = [[(NSDictionary *)result objectForKey:@"data"]retain];
    for (int i=0; i<[items count]; i++) {
        NSDictionary *friend = [items objectAtIndex:i];
        long long fbid = [[friend objectForKey:@"id"]longLongValue];
        NSString *name = [friend objectForKey:@"name"];
        NSLog(@"id: %lld - Name: %@", fbid, name);
    }
}

Solution 3

To get list of friends you can use

https://graph.facebook.com/me/friends

[facebook requestWithGraphPath:@"me/friends"
                     andParams:nil
                   andDelegate:self];

To know more about all the possible API please read

https://developers.facebook.com/docs/reference/api/

Solution 4

Maybe this could help

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

Solution 5

Use the function below to asynchronously fetch user's friends stored in an NSArray:

- (void)fetchFriends:(void(^)(NSArray *friends))callback
{
    [FBRequestConnection startForMyFriendsWithCompletionHandler:^(FBRequestConnection *connection, id response, NSError *error) {
        NSMutableArray *friends = [NSMutableArray new];
        if (!error) {
            [friends addObjectsFromArray:(NSArray*)[response data]];
        }
        callback(friends);
    }];
}

In your code, you can use it as such:

[self fetchFriends:^(NSArray *friends) {
    NSLog(@"%@", friends);
}];

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