开发工具模拟器，我不知道微信应该是什么版本。

数据：

tstd: {

      keys: ['k1', 'k2'],

      valuess: [

        [

          { pic:'https://7465-test-b4d6da-1258259003.tcb.qcloud.la/1/ques1.png?sign=1d5d7059f6c2d66104142a6c35657000&t=1546570793'},

          { pic: 'https://7465-test-b4d6da-1258259003.tcb.qcloud.la/1/ques1.png?sign=1d5d7059f6c2d66104142a6c35657000&t=1546570793' }

        ],

        [{ pic: 'https://7465-test-b4d6da-1258259003.tcb.qcloud.la/1/ques1.png?sign=1d5d7059f6c2d66104142a6c35657000&t=1546570793' }]

      ],

      length: 2

    },

wxml：

<swiper class='slider' indicator-dots='true' style='height:{{sliderHeight}}px' current='0'>

    <block wx:for='tstd.valuess[0].length'>

        <swiper-item>

        <text>{{tstd.valuess[0].length}}</text>

          <image class='sliderImage' src='{{tstd.valuess[0][index].pic}}' mode='aspectFit'/>

        </swiper-item>

      </block>

    </swiper>

或者

<block wx:for='tstd.valuess[0]'>

        <swiper-item>

        <text>{{index}}</text>

          <image class='sliderImage' src='{{item.pic}}' mode='aspectFit'/>

        </swiper-item>

      </block>

蓝线这里，太多的swiper-item了，哪里来的呢？一共22个。