ios - APNS 通知 TTL

Question

我成功地使用 APNS 从网络应用程序向在其设备上安装了配套 iOS 应用程序的用户发送通知。

现在，我正在寻找一种方法来为通知指定一种 TTL，以便用户不会收到过时的信息。

这SO question声明通知(至少是每个用户的最后一个通知)在删除前会保留大约一个月，这对我来说太长了。

是否有为通知指定 TTL 或撤回/删除以前发送的通知的解决方案？

Answer 1

在Communicating with APNs它指出您可以为通知设置到期日期:

A UNIX epoch date expressed in seconds (UTC). This header identifies the date when the notification is no longer valid and can be discarded. If this value is nonzero, APNs stores the notification and tries to deliver it at least once, repeating the attempt as needed if it is unable to deliver the notification the first time. If the value is 0, APNs treats the notification as if it expires immediately and does not store the notification or attempt to redeliver it.