会发生什么失去网络连接后，推送通知？ [英] What happens to push notifications after losing internet access?

问题描述

如果一个应用程序正在等待一个推送通知和互联网连接不可用，会发生什么？

What happens if an application is waiting for a push notification and the internet connection is unavailable?

例如，我告诉我的服务器做任务A，并通过APNS通知我当任务已准备就绪。但是，当我发送任务到服务器，应用程序失去互联网连接。

For example, I tell my server to do task "A", and notify me via APNS when the task is ready. But, after I send the task to the server, the application loses internet connectivity.

推荐答案

在iPhone上的网络连接再次可用通知将交付。

Notification will be delivered when internet connection on iPhone becomes available again.

苹果推送通知服务包括服务的默认质量
  （QoS）的组件，它执行一个存储和转发功能。如果的APN
  试图发送一个通知，但该设备处于脱机状态，服务质量
  存储通知。它保留了每个只有一个通知
  应用在设备上：从接收到的最后的通知
  提供商该应用程序。当脱机设备后
  重新连接，所述QoS转发所存储的通知到设备。
  QoS的保留在一定期限内通知删除之前，
  吧。

Apple Push Notification Service includes a default Quality of Service (QoS) component that performs a store-and-forward function. If APNs attempts to deliver a notification but the device is offline, the QoS stores the notification. It retains only one notification per application on a device: the last notification received from a provider for that application. When the offline device later reconnects, the QoS forwards the stored notification to the device. The QoS retains a notification for a limited period before deleting it.

见<一节服务质量 href=\"http://developer.apple.com/library/mac/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/ApplePushService/ApplePushService.html\">Local和推送通知编程指南。

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