wechat-pilelog/pages/charginfo/eleCarMap.wxml

<view class='view'>
  <map longitude="{{longitude}}" latitude="{{latitude}}" markers="{{markers}}" covers="{{covers}}" show-location>

    <cover-view slot="callout">
        <block wx:for="{{customCalloutMarkerIds}}" wx:key="*this">
          <cover-view  class="customCallout" marker-id="{{item}}" >
            <cover-image class="icon" src="/image/voice.png"></cover-image>
            <cover-view class="content"> 
              {{num}}-{{item}}-{{index}}
            </cover-view>
          </cover-view>
        </block>
      </cover-view>
 
  </map>
  <text class="txt">请选择可用车位和电池包</text>
  <button class='login_button' bindtap="bindCar">呼叫充电车</button>
</view>