html - 推送通知通道何时更改？

Question

我有一个地铁应用程序，正在实现推送通知概念。在这里我想在我的应用程序安装时将频道 URI 发送到我的服务器，所以在哪种情况下我需要获取频道 URI，在哪种情况下我需要将此 URI 发送到服务器。实际上，在这里我观察到频道 URI 仅在我们卸载应用程序并重新安装时才会变化。否则它将保持不变。谁能建议我需要使用哪些事件，这里使用的是 HTML5 和 WinJS？

谢谢你。

Answer 1

A new push notification channel URI isn't always created when the channel API is called. The CreatePushNotificationChannelForApplicationAsync method will return a cached local copy of the channel URI for a period of time (currently 24 hours).

The how-to article on MSDN provides guidance about channel management summarized here:

• Whenever the app is run, request a new channel.
• If the new channel URI is different from the old channel URI:
  • Replace the channel URI on the service with the new channel URI.
  • Once your service has the channel, store the new channel URI for future comparisons.