ios - ios Facebook用户信息

您能帮我怎样获取用户信息。

  NSString *name;
[FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error)
    {
        if (!error)
        {
            // Success! Include your code to handle the results here
           name = [result objectForKey:@"first_name"]; // Error!!! how to get data from this handler
        }
        else
        {
            // An error occurred, we need to handle the error
            // See: https://developers.facebook.com/docs/ios/errors
        }

    }];

上述代码-异步？如何使其同步？告诉我有关机制或告诉我在哪里阅读。谢谢！

最佳答案

好像您完全搞砸了。尝试下面的代码，但是请确保您理解它：

- (void) SetUserData
{
    [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error)
    {
        if (!error)
        {
            self.first_name  = [result objectForKey:@"first_name"];
            NSLog(@"First name just came from server: first_name: %@", self.first_name);
        }
        else
        {

        }
    }];
    [self furtherProcessMethod];
}


- (void) furtherProcessMethod
{
    if (self.first_name == nil)
    {
        // this is not recursion, do not miss that!!
        [self performSelector:@selector(furtherProcessMethod) withObject:nil afterDelay:2.0];
    }
    else
    {
        NSLog(@"First name that I can work with first_name: %@", self.first_name);
// here you can handle you first_name, after it came
    }
}

因此，一段时间后，您需要登录：
名字只是来自服务器：first_name：一些名字
我可以使用first_name使用的名字：一些名字