no message

pages/index/index.wxml

@@ -12,7 +12,7 @@
     <view class='top-right'></view>
   </view>
   <swiper indicator-dots="{{indicatorDots}}" autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}">
-    <block wx:for="{{imgUrls}}">
+    <block wx:for="{{imgUrls}}" wx:key="imgUrl">
       <swiper-item>
         <image src="{{item.imgUrl}}" class="slide-image" mode='widthFill' />
       </swiper-item>
@@ -20,12 +20,12 @@
   </swiper>
   <view class='menu'>
     <view class='list'>
-      <view wx:for-items="{{menu_list}}" wx:if="{{index < 4}}" class="view">
+      <view wx:for-items="{{menu_list}}" wx:if="{{index < 4}}" class="view" wx:key="name">
         <button class='{{item.className}}'>{{item.name}}</button>
       </view>
     </view>
   </view>
-  <view wx:for-items="{{activityList}}">
+  <view wx:for-items="{{activityList}}" wx:key="goodsNo">
     <view class='activity_list_view' bindtap='loading' data-item='{{item.goodsNo}}'>
       <view class='view'>
         <image src='{{item.showUrl}}' class='image'></image>