iphone - ios中的FBConnect应用邀请

Question

嗨，我正在尝试向我的 facebook 朋友执行应用请求。我尝试了以下代码来发送应用邀请：

SBJSON *jsonWriter = [[SBJSON new] autorelease];
NSDictionary *testingDic = [NSDictionary dictionaryWithObjectsAndKeys:
                             @"5", @"wow",
                             @"1", @"testing",
                             nil];

NSString *testStr = [jsonWriter stringWithObject:testingDic];
NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               @"Learn how to make your iOS apps invite.",  @"message",
                               @"Check this out", @"notification_text",
                               testStr, @"data",
                               nil];

AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[[delegate facebook] dialog:@"apprequests"
                  andParams:params
                andDelegate:self];

我可以看到上面的代码执行没有错误，但是我没有从 Facebook 获得请求 ID 作为响应，而且我在 Facebook 中看不到我的应用程序请求。

请帮帮我。