groupWork/components/navBar/navBar.wxml

<van-nav-bar title="{{navbarInfo.title}}">
  <van-icon name="arrow-left" slot="left" wx:if="{{navbarInfo.leftShow}}" bindtap="leftBtn" data-smile='1' />
  <view slot="left" wx:else class="leftInfo">
    <text wx:if="{{!hasUserInfo}}" bindtap="getUserProfile">获取头像昵称</text>
    <image wx:else src="{{userInfo.avatarUrl}}" mode="cover" bindtap="leftBtn" data-smile='2'></image>
  </view>
</van-nav-bar>