消息间隔30分钟，插入一条时间消息，记录消息大概的发送时间

pages/im/group/chat.vue

@@ -156,15 +156,25 @@
                 this.$refs.messageBar.onHidePopus()
             },
             getNewMessage() {
+                if (new Date().getTime() - this.latestMessage.sentTime > 18000000) {
+                    // 在本地插入一条时间的消息
+                    const messageContent = {
+                        objectName: 'RC:InfoNtf',
+                        message: 'DateInfo'
+                    }
+                    RongIMLib.insertOutgoingMessage(this.conversationType, this.targetId, 50, messageContent, 0)
+                }
+
                 im.getMessageList(
                     this.conversationType,
                     this.targetId,
-                    this.latestMessage.sentTime,
+                    this.latestMessage.sentTime || 0,
                     10,
                     false,
                     (messages) => {
-                        console.log('获取最新消息', messages);
-                        this.messages.unshift(...messages)
+                        console.log(messages);
+                        // 
+                        this.messages.unshift(...messages.reverse())
                         this.scrollBottom()
                     })
             },