退出聊天室会断开连接

parts/scenes/chat.lua

@@ -25,6 +25,10 @@ function scene.sceneInit()
 	)
 end
 
+function scene.sceneBack()
+    WSCONN=nil
+end
+
 function scene.keyDown(k)
 	if k=="return"then
 		sendMessage()

parts/tick.lua

@@ -338,6 +338,7 @@ end
 function Tick.wsCONN_read()
 	while true do
 		yield()
+		if not WSCONN then return end
 		local messages,readErr=client.read(WSCONN)
 		if messages then
 			if messages[1]then