MD_YOSwechat/custom-tab-bar/index.wxml

<van-tabbar active="{{ active }}" placeholder active-color='#3874F6'>
    <van-tabbar-item bindtap="onChange" info="{{item.fcount}}" data-index="{{index}}" data-url="{{item.url}}" wx:for="{{tabbarList}}" wx:key="index">
        <text slot='icon' class="{{'iconfont '+item.icon}}" style="font-size: 44rpx; color: #999999;" data-index="{{index}}" data-url="{{item.url}}" />
        <text slot='icon-active' class="{{'iconfont '+item.icon}}" style="font-size: 44rpx; color: #3874F6;" data-index="{{index}}" data-url="{{item.url}}" />
        {{item.text}}
    </van-tabbar-item>
</van-tabbar>