分析对对象Facebook API iOS的响应

Question

例如，我正在使用Facebook API获取我的个人资料：

[FBRequestConnection startWithGraphPath:@"/me"
                             parameters:nil
                             HTTPMethod:@"GET"
                      completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
    NSLog(@"RESULT: %@", result);
}];    

我该如何回答：

2014-10-21 16:45:40.435 FacebookTestApp[***] RESULT: {
    "first_name" = Richard;
    gender = male;
    id = *********************;
    "last_name" = Topchiy;
    link = "https://www.facebook.com/app_scoped_user_id/******/";
    locale = "en_US";
    name = "Richard Topchiy";
    timezone = 3;
    "updated_time" = "2014-05-20T17:34:52+0000";
    verified = 1;
}    

我可以访问这样的数据：

  FBGraphObject *obj = (FBGraphObject *)result;
  NSString *str = obj[@"first_name"];

但是有没有办法像这样使用API：

FBGraphObject *obj = (FBGraphObject *)result;
NSString *name = obj.first_name;

我还没有在官方文档中找到这个，我无法创建"FBGraphUser"。是我做错了什么，还是Facebook禁用了此功能？

Answer 1

FBGraphUser是一个协议。因此，您可以执行以下操作：FBGraphObject<FBGraphUser> *user = (FBGraphObject<FBGraphUser>*)result;