长连接手动断开和重连

[tanchendong1992]

你好
如何在 APP 进入后台时,手动断开长连接,从新打卡 APP 时再重新连接长连接?

[designatednerd]

Via Google Translate since I don't speak Chinese:

Hello there
How to manually disconnect the long connection when the APP enters the background, and then reconnect the long connection when the APP is newly clocked in?

Are you asking about subscriptions or some other kind of long connection?

[tanchendong1992]

你好.订阅消息. WebSocketTransport

如果使用方法.我想在 APP 进入后台时,断开.在 APP重新打开的时候重新连接?
初学者请多见谅!

[designatednerd]

Hello. Subscribe to news. WebSocketTransport

Here's Apple's documentation on handling lifecycle changes - The short answer is that you will probably want to call closeConnection on the webSocketTransport in your App Delegate's applicationWillResignActive method and restart the susbcription in applicationDidBecomeActive.

Note that names are different in the Scene delegate if you're using that, but I don't think you are since you're using a singleton rather than per-scene instances of Network.

Let me know if that helps!

[tanchendong1992]

是的,这个地方使用的是单例.多个订阅消息在这里接受,然后进行分发处理.
需要在 UIApplicationWillResignActiveNotification 时,断开订阅连接
UIApplicationDidBecomeActiveNotification 重新连接订阅

是通过 self.webSocketTransport.closeConnection() 断开订阅么

[tanchendong1992]

你好.我通过 调用 self.webSocketTransport.closeConnection() ,已经可以断开连接了. 在 UIApplicationDidBecomeActiveNotification 的时候怎么重新建立连接呢?

[designatednerd]

Google translated:

Hello. I can disconnect by calling self.webSocketTransport.closeConnection(). How to re-establish the connection when UIApplicationDidBecomeActiveNotification?

Ah, because addSubscribe won't work if the web socket isn't connected, and right now there's not a way to tell the websocket to reconnect non-automatically.

The good news is #1335 will add the ability to reconnect more easily. Until then you'll probably need to hack it by using either updateHeaderValues or updateConnectingPayload to force a reconnection.

[designatednerd]

#1335 is merged to main if you want to use it immediately, it'll come out probably sometime later this week in an official release. I'm going to close this out.