FBAPICall.m

FBAPICall.m

void(^requestCompletionHandler)(FBRequestConnection *, NSDictionary<FBGraphUser> *, NSError *);
requestCompletionHandler = ^(FBRequestConnection *conn,
                             NSDictionary<FBGraphUser> *user,
                             NSError *err){
    if(!err){
        NSLog(@"Successfully fetched user info!");
        NSLog(@"userInfo = %@", user);
        
        NSLog(@"These will work:");
        NSLog(@"email:\t%@", [user objectForKey:@"email"]);
        NSLog(@"gender:\t%@", [user objectForKey:@"gender"]);
        
    }else{
        NSLog(@"Fail to fetch user data!");
    }
};
    
[FBSession openActiveSessionWithReadPermissions:@[@"public_profile", @"email"]
                                   allowLoginUI:YES
                              completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
                                    if(!error){
                                        NSLog(@"Successfully logged in!");
                                        [[FBRequest requestForMe] startWithCompletionHandler:requestCompletionHandler];
                                    }else{
                                        NSLog(@"Fail to log in!");
                                    }
                                }
];