Firebase用户的在线状态 [英] Firebase user`s online status

问题描述

我正在使用包含firabase连接的移动应用程序.我想处理用户的在线状态.最初的想法是从应用程序设置状态:在线onAppStart和离线onClising，但是我们都知道该应用程序可能以错误的方式关闭，然后状态将不会被更新.

I'm making mobile app with include firabase connection. I'd like to handle user online status. First idea was to set status from app : online onAppStart and offline onClising, but we all known that app can be closed in wrong way, and then status wont be updated.

我发现了这样的东西:

firebase.database().ref(".info/connected");

如果我在firebase-function模块中的某个地方设置了它，它将按我的意愿工作吗?这是最好的选择吗?

Will it work as I want if i set this somewhere in firebase-function module? Is it the best options to do this?

推荐答案

我认为您正在实时数据库中寻找状态机制.

I think you are looking for the presence mechanism in the Realtime Database.

看看:

• 如何构建状态系统(Firebase博客)
• 在实时数据库中使用在线状态

• How To Build a Presence System (Firebase blog)
• Using presence in Realtime Database

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