C# 必须从主线程调用Facebook GraphRequest.Start（）？

我试图遵循此处提供的入门示例：

以下GraphRequest在主线程内执行时工作正常：

var request = new GraphRequest ("/me?fields=name", null, AccessToken.CurrentAccessToken.TokenString, null, "GET");
request.Start ((connection, result, error) => {
    // Handle if something went wrong with the request
    if (error != null) {
        new UIAlertView ("Error...", error.Description, null, "Ok", null).Show ();
        return;
    }

    // Get your profile name
    var userInfo = result as NSDictionary;
    nameLabel.Text = userInfo ["name"].ToString ();
});

但是，当我使用Task.run从后台线程运行完全相同的代码时，似乎从未调用request.Start中的完成处理程序委托

GraphRequest是否只支持从主线程执行？

您可以使用：

var graphRequest = new GraphRequest ("/me?fields=name,gender", null, AccessToken.CurrentAccessToken.TokenString, null, "GET");
    var requestConnection = new GraphRequestConnection();
    requestConnection.AddRequest(graphRequest, (connection, result, error) =>
      {
        var profile = result;
      });
    requestConnection.Start();