wxappb2b/GuangZuan/miniprogram/mHome/pages/purchase/detail/index.wxml

<!--mHome/pages/purchase/detail/index.wxml-->
<view class="container">
  <!-- 导航栏 -->
  <van-nav-bar custom-style="background-color: #407DB8">
    <van-icon slot="left" name="arrow-left" size="25px" color="#fff" bind:click="backToParent"/>
    <text slot="title" style="color: #fff;">{{ navTitle }}</text>
  </van-nav-bar>
</view>