fix: 部分机型首次打开聊天窗口不显示聊天记录的问题

resources/assets/js/pages/manage/components/DialogWrapper.vue

@@ -482,7 +482,6 @@
             </template>
         </Modal>
 
-
         <!-- 设置待办 -->
         <Modal
             v-model="todoSettingShow"
@@ -673,7 +672,6 @@ export default {
             msgActivity: false,     // 消息活动中
             msgPrepared: false,     // 消息已准备
 
-
             focusLazy: false,
             focusTimer: null,
 
@@ -1338,7 +1336,7 @@ export default {
             }
             const historyLength = this.allMsgs.length
             const historyLastId = historyLength > 0 ? this.allMsgs[historyLength - 1].id : 0
-            if ($A.isIos() && list.length !== historyLength) {
+            if ($A.isIos() && list.length !== historyLength && this.$refs.scroller) {
                 // 隐藏区域，让iOS断触
                 const scrollEl = this.$refs.scroller.$el
                 scrollEl.style.visibility = 'hidden'
@@ -1355,7 +1353,6 @@ export default {
             }
         },
 
-
         'allMsgs.length' () {
             if (this.stickToBottom) {
                 this.onToBottom()