从应用程序内部触发推送通知 [英] Trigger a push notification from inside the app

问题描述

是否可以从应用本身内部触发推送通知?

Is it possible to trigger a push notification from inside the app itself?

我需要构建一个将远程文件与缓存文件进行比较的功能，如果远程文件上有任何新内容，它将更新缓存并从应用程序本身触发推送通知.

I need to build a function that compares a remote file to a cached file and if there is any new content on the remote file it updates the cache and triggers a push notification from the app itself.

我想知道这是否可能吗?如果可以的话，我将如何进行构建?

I was wondering if this is possible? And if so how would I go about building it?

注意:缓存的文件将为JSON格式.

Note: the cached file will be in JSON format.

推荐答案

要使其成为可能，您将必须永久检查更新，这将消耗用户的电池并消耗网络资源容量，因此设置服务器来实现此任务是解决问题的方法.

To make this possible, you would have to permanently check for updates, which would drain the user's battery and consume networking capacity, so setting up a server to realise this task is the way to go here.

它看起来像这样:

1. 将设备的推送令牌发送到服务器，并订阅对文件的更改.
2. 更改远程文件时，在服务器上触发操作.
3. 使用您在步骤1中获得的推送令牌将通知发送给那些订阅了文件的设备.

要了解有关推送通知如何工作的更多信息，请查看此出色的教程这里.

To learn more about how push notifications work, you can have a look onto this great tutorial here.

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