bwj_wechat/components/My_navBar/index.wxml

<view class="header_nav" style="height:{{NavHeight}}rpx;">
    <view class="header_nav_title" style="height: {{capsule.height}}px;top:{{capsule.top}}px">
        布万家
        <view wx:if="{{isLogin}}" class="header_user_choice" bindtap="changeUser">
            <view class="u-line-1">{{userName}}</view>
            <van-icon name="arrow-down" />
        </view>
        <view wx:else  class="header_user_choice" bindtap="toLogin">
            游客-请登录
        </view>
    </view>
</view>
<!-- 占位 -->
<view style="height:{{NavHeight}}rpx;">
</view>