调整新信息的获取模式，以前是刷新整体列表，更改为concat

pages/im/private/chat.nvue

@@ -6,8 +6,9 @@
                 <view class="time">
                     <text class="text">{{ customCN(item.sentTime) }}</text>
                 </view>
-                <view class="cell-item" :class="item.messageDirection == 1 ? 'right' : 'left'">
-                    <u-avatar class="avatar" size="36" shape="square"  @click="showUser(targetId, item.messageDirection)" :src="userInfo.portraitUrl" />
+                <view class="cell-item" :class="item.messageDirection == 1 ? 'right' : 'left'">
+                    <u-avatar class="avatar" size="36" shape="square" @click="showUser(targetId, item.messageDirection)"
+                        :src="userInfo.portraitUrl" />
                     <view class="msg">
                         <show-voice v-if="item.objectName === 'RC:HQVCMsg'" :guest="item.messageDirection == 1"
                             :msg="item.content" />
@@ -23,7 +24,7 @@
             </cell>
             <cell class="cell-footer" ref="chatBottom"></cell>
         </list>
-        <sent-message-bar :conversationType="conversationType" :targetId="targetId" @onSuccess="getMessageList()" />
+        <sent-message-bar :conversationType="conversationType" :targetId="targetId" @onSuccess="getNewMessage()" />
     </view>
 </template>
 
@@ -70,30 +71,48 @@
             // 监听消息已读状态
             uni.$on('onReadReceiptReceived', (data) => {
                 if (data.targetId == this.targetId) {
-                    this.getMessageList()
+                    this.messages = this.messages.map((item) => {
+                        if (item.messageDirection == 1 && item.sentStatus == 30 && item.receivedTime <
+                            data.messageTime + 1000) {
+                            item.sentStatus = 50
+                        }
+                        return item
+                    })
                 }
             })
             // 监听收到新消息，判断是否是当前会话，更新会话内容
             uni.$on('onReceiveMessage', (msg) => {
                 if (msg.targetId == this.targetId) {
-                    this.getMessageList()
+                    this.getNewMessage()
                 }
             })
         },
-        onBackPress() {
-            uni.$off('onReceiveMessage')
+        onUnload() {
+            uni.$off('onReadReceiptReceived')
         },
         methods: {
             customCN(val) {
                 return timeCustomCN(val)
             },
+            getNewMessage() {
+                im.getMessageList(
+                    this.conversationType,
+                    this.targetId,
+                    new Date().getTime(),
+                    10,
+                    false,
+                    (messages) => {
+                        this.messages = this.messages.concat(messages)
+                        this.scrollBottom()
+                    })
+            },
             // 获取消息列表
             getMessageList() {
                 im.getMessageList(
                     this.conversationType,
                     this.targetId,
                     new Date().getTime(),
-                    10,
+                    100,
                     true,
                     (messages) => {
                         this.messages = messages.reverse()
@@ -110,7 +129,7 @@
             // 滚动到底部
             scrollBottom(type) {
                 // 清理当前会话，未读消息数量
-                RongIMLib.clearMessagesUnreadStatus(this.conversationType, this.targetId, new Date().getTime() + 1100)
+                RongIMLib.clearMessagesUnreadStatus(this.conversationType, this.targetId, new Date().getTime())
                 // 发送消息已读状态给对方
                 RongIMLib.sendReadReceiptMessage(this.conversationType, this.targetId, new Date().getTime())
                 // 更新badge提醒数量