//.js Page({   /**    * 页面的初始数据    */   data: {     currentTab: 0,          imgalist0: [ 'https://lg-1c7jwm16-1257218715.cos.ap-shanghai.myqcloud.com/309586315285779976.jpg',       'https://lg-1c7jwm16-1257218715.cos.ap-shanghai.myqcloud.com/e6b5f06c7655fd7fa9699987c4578641_u%3D1837457002%2C1490875854%26fm%3D27%26gp%3D0.jpg'                ],     imgalist1: ['https://lg-1c7jwm16-1257218715.cos.ap-shanghai.myqcloud.com/e6b5f06c7655fd7fa9699987c4578641_u%3D1837457002%2C1490875854%26fm%3D27%26gp%3D0.jpg',       'https://lg-1c7jwm16-1257218715.cos.ap-shanghai.myqcloud.com/309586315285779976.jpg'      ],     imgalist2: ['https://lg-1c7jwm16-1257218715.cos.ap-shanghai.myqcloud.com/309586315285779976.jpg', 'https://lg-1c7jwm16-1257218715.cos.ap-shanghai.myqcloud.com/309586315285779976.jpg'     ]      },    /**       * 预览图片      */   previewImage: function (e) {     var current = e.target.dataset.src;     wx.previewImage({       current: current, // 当前显示图片的http链接       urls: this.data.imgalist0,       urls: this.data.imgalist1,       urls: this.data.imgalist2,// 需要预览的图片http链接列表     })   }   })                   <!--pages/index/index/tb/tb.wxml--> <view class="swiper-tab">     <view class="swiper-tab-item {{currentTab==0?'active':''}}" data-current="0" bindtap="clickTab">第一个</view>     <view class="swiper-tab-item {{currentTab==1?'active':''}}" data-current="1" bindtap="clickTab">第二个</view>     <view class="swiper-tab-item {{currentTab==2?'active':''}}" data-current="2" bindtap="clickTab">第三个</view> </view> <view> <swiper current="{{currentTab}}" duration="300"  bindchange="swiperTab"> <swiper-item> <view wx:for="{{imgalist0}}"  wx:key="key" wx:for-item="image" class="previewimg"> <image src="{{image}}" data-src="{{image}}" bindtap="previewImage"></image> </view> </swiper-item> <swiper-item> <view wx:for="{{imgalist1}}"  wx:key="key" wx:for-item="image" class="previewimg"> <image src="{{image}}" data-src="{{image}}" bindtap="previewImage"></image> </view> </swiper-item> <swiper-item> <view wx:for="{{imgalist2}}"  wx:key="key" wx:for-item="image" class="previewimg"> <image src="{{image}}" data-src="{{image}}" bindtap="previewImage"></image> </view> </swiper-item> </swiper> </view> 商品可以实现分类啦，在每个分类下放两张图片以上，却只能显示一张图片的内容，这是为什么，编辑器也没有显示代码有出现错误，但是就是显示不了，我想要的效果，求大家帮忙看看，这是为什么？

[图片] 上面是商品的分类表，下面是商品，点击上面的列表名称转到该类别的商品？求大神帮忙