fix:首页轮播图片使用的字段

components/banner-swiper/banner-swiper.wxml

@@ -3,7 +3,7 @@
   <swiper class='swiper' indicator-dots="{{indicatorDots}}" indicator-color="{{indicatorColor}}" indicator-active-color="{{indicatorActiveColor}}" autoplay="{{autoplay}}" current="{{currentSwiper}}" circular="{{circular}}" interval="{{interval}}" bindchange="changeSwiper">
     <block wx:for="{{banners}}" wx:for-item="banner" wx:key="id">
       <swiper-item>
-        <image wx:if="{{banner.coverImage}}" mode="aspectFill" class="banner-img" src="{{banner.coverImage}}" data-id="{{banner.id}}" data-title="{{banner.title}}" bindtap="tapBanner"></image>
+        <image wx:if="{{banner.coverImageUrl}}" mode="aspectFill" class="banner-img" src="{{banner.coverImageUrl}}" data-id="{{banner.id}}" data-title="{{banner.title}}" bindtap="tapBanner"></image>
       </swiper-item>
     </block>
   </swiper>