objective-c - 目标 C：检测 Facebook 邀请的数量

Question

我正在尝试检测用户在登录 Facebook 帐户时发送了多少邀请。例如，我通过邀请 3 位朋友使用 iOS 应用程序为用户提供购买商品的选项。如果他们邀请 3 个，他们将获得该项目的奖励。我真的坚持这个。任何帮助都会非常好，非常感谢！

Answer 1

经过大量研究，我实际上找到了代码片段。我不记得它是否在这里，但它在这里。

- (IBAction)inviteFacebookFriendsButton:(id)sender
{
    // FBSample logic
    // if the session is open, then load the data for our view controller
    if (!FBSession.activeSession.isOpen)
    {
        // if the session is closed, then we open it here, and establish a handler for state changes
        [FBSession openActiveSessionWithReadPermissions:nil
                                           allowLoginUI:NO
                                      completionHandler:^(FBSession *session,
                                                          FBSessionState state,
                                                          NSError *error) {
                                          if (error) {
                                              UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                                                                  message:error.localizedDescription
                                                                                                 delegate:nil
                                                                                        cancelButtonTitle:@"OK"
                                                                                        otherButtonTitles:nil];
                                              [alertView show];
                                          } else if (session.isOpen) {


                                          }
                                      }];
    }

    MouseInTheHouseAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

    if (appDelegate.session.isOpen)
    {
        NSMutableDictionary  *postVariablesDictionary = [[NSMutableDictionary alloc] init];
        [postVariablesDictionary setObject:@"Come play Mouse in the House with me!" forKey:@"message"];
        [postVariablesDictionary setObject:@"Invite Friends" forKey:@"title"];

        [FBWebDialogs presentDialogModallyWithSession:[FBSession activeSession] dialog:@"apprequests" parameters:postVariablesDictionary handler:^(FBWebDialogResult result, NSURL *resultURL, NSError *error)
         {
         if (error)
         {
             // Case A: Error launching the dialog or sending request.
             NSLog(@"Error sending request.");
         }
         else
         {
             if (result == FBWebDialogResultDialogNotCompleted)
             {
                 // Case B: User clicked the "x" icon
                 NSLog(@"User canceled request.");
             }
             else
             {
                 NSRegularExpression * regex = [NSRegularExpression regularExpressionWithPattern:@"to%5B\\d+%5D=(\\d+)"
                                                                                         options:NSRegularExpressionCaseInsensitive
                                                                                           error:NULL];
                 NSArray * matches = [regex matchesInString:resultURL.absoluteString
                                                    options:0
                                                      range:(NSRange){0, resultURL.absoluteString.length}];
                 NSMutableArray * ids = [NSMutableArray arrayWithCapacity:matches.count];
                 for (NSTextCheckingResult * match in matches)
                 {
                     [ids addObject:[resultURL.absoluteString substringWithRange:[match rangeAtIndex:1]]];
                 }

                 NSLog(@"Number of friends invited: %lu", (unsigned long)ids.count);
             }
         }
     }];
    }
}