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在 Apple Documentation 的服务质量部分，它指出:
If APNs attempts to deliver a notification but the device is offline, the notification is stored for a limited period of time, and delivered to the device when it becomes available.
有谁知道“有限的时间段”是多长时间，一旦发送后是否会从 APNS 中删除？
最佳答案
这里问了同样的问题: How long does a push notification sit in queue before being removed?
根据 PCWorld (2009 年)，是 28 天。
While 28 days may have been true in 2009, I wouldn't be surprised if its >different today. The ambiguity in the documentation is a great excuse for >Apple to change this timeout period willy-nilly.
关于ios - 通知在 APNS 服务器上存储多长时间？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32719540/