wxappb2b/GuangZuan/miniprogram/custom-tab-bar/index.wxml

<van-tabbar active="{{ active }}" active-color="{{ activeColor }}" inactive-color="{{ color }}" bind:change="onChange">
  <van-tabbar-item wx:for="{{ list }}" wx:key="index" icon="{{ active === index ? item.aicon : item.icon }}.png">{{ item.text }}</van-tabbar-item>
</van-tabbar>