新消息提醒机制，调整为uni.$emit全局事件，网络状态变化亦然

store/modules/im.js

@@ -2,19 +2,10 @@ import im from "@/utils/im/index.js"
 
 export default {
     state: {
-        newMsg: {},
         friends: {},
         sender: {},
-        // IM连接状态，0是正常
-        connection: 0
     },
     getters: {
-        newMessage(state) {
-            return state.newMsg
-        },
-        connection(state) {
-            return state.connection
-        },
         friends(state) {
             return state.friends
         },
@@ -40,28 +31,14 @@ export default {
         }
     },
     mutations: {
-        newMessage(state, msg) {
-            Vue.set(state, 'newMsg', msg)
-        },
         updateFriends(state, userInfo) {
             Vue.set(state.friends, userInfo.userId, userInfo)
         },
         SET_state_sender(state, userInfo) {
             state.sender = userInfo
-        },
-        SET_connection_status(state, status) {
-            state.connection = status
         }
     },
-    actions: {
-        updateConnectionStatus({commit}, status) {
-            commit('SET_connection_status', status)
-        },
-        newMessage({
-            commit
-        }, msg) {
-            commit('newMessage', msg)
-        },
+    actions: {
         setSenderInfo({
             commit
         }, userInfo) {