更新 优化单图片时的样式

components/uni-im-msg/types/rich-text.vue

 <template>
   <view class="uni-im-rich-text"
-    :class="{'isFromSelf':isFromSelf, 'only1u': trBody.length === 0 &&webInfoList.length === 1}">
+    :class="{'isFromSelf':isFromSelf, 'only1u': trBody.length === 0 &&webInfoList.length === 1 , isSingeImg}">
     <template v-for="(item,index) in trBody" :index="index">
       <template v-if="item.name == 'span'">
         <text v-if="item.attrs && item.attrs.class == 'nickname'" class="text nickname"
@@ -89,6 +89,9 @@
       // }
     },
     computed: {
+      isSingeImg() {
+        return this.msg.body.filter(item => item.name != 'img' && item.text).length === 0
+      },
       imgList() {
         return this.msg.body.filter(item => item.name == 'img').map(item => item.attrs.src)
       },
@@ -321,4 +324,10 @@
   .web-info .link-box .copy:hover {
     opacity: 0.8;
   }
+  /* #ifndef APP-NVUE */
+  .uni-im-rich-text.isSingeImg {
+    background-color: transparent !important;
+    padding: 0;
+  }
+  /* #endif */
 </style>
\ No newline at end of file