我看过与应用内购买相关的帖子，并且无法找到我正在寻找的任何解决方案，或者可能无法正确获得答案。
现场是我已成功实施了应用程序并通过在NSUserDefaults中将值设置为YES来解锁所购买的内容。
问题在于，如果用户获得应用程序的退款，则NSUserDefaults中的值仍为YES，并且他仍然可以使用高级功能。
我已阅读有关使用Apple服务器验证收据并检查取消日期字段的帖子，但是当我从Apple服务器获取JSON响应时，它不包含取消日期字段。
这就是我从Apple那里收到的JSON。
{
environment = Sandbox;
receipt = {
"adam_id" = 0;
"app_item_id" = 0;
"application_version" = 1;
"bundle_id" = "com.company.bundleidentifier";
"download_id" = 0;
"in_app" = (
{
"is_trial_period" = false;
"original_purchase_date" = "2015-11-24 15:15:01 Etc/GMT";
"original_purchase_date_ms" = 1448378101000;
"original_purchase_date_pst" = "2015-11-24 07:15:01 America/Los_Angeles";
"original_transaction_id" = 1000000181657877;
"product_id" = myinappid;
"purchase_date" = "2015-11-24 15:15:01 Etc/GMT";
"purchase_date_ms" = 1448378101000;
"purchase_date_pst" = "2015-11-24 07:15:01 America/Los_Angeles";
quantity = 1;
"transaction_id" = 1000000181657877;
}
);
"original_application_version" = "1.0";
"original_purchase_date" = "2013-08-01 07:00:00 Etc/GMT";
"original_purchase_date_ms" = 1375340400000;
"original_purchase_date_pst" = "2013-08-01 00:00:00 America/Los_Angeles";
"receipt_creation_date" = "2015-11-26 06:38:22 Etc/GMT";
"receipt_creation_date_ms" = 1448519902000;
"receipt_creation_date_pst" = "2015-11-25 22:38:22 America/Los_Angeles";
"receipt_type" = ProductionSandbox;
"request_date" = "2015-11-26 06:52:30 Etc/GMT";
"request_date_ms" = 1448520750619;
"request_date_pst" = "2015-11-25 22:52:30 America/Los_Angeles";
"version_external_identifier" = 0;
};
status = 0;
}
任何人都可以告诉我解决问题，并建议我一些可能的解决方案，以便在用户获得退款时锁定优质内容。