<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 class="header_user_choice" bindtap="a1212">
            {{userName}}
            <van-icon name="arrow-down" />
        </view>
    </view>
</view>
<!-- 占位 -->
<view style="height:{{NavHeight}}rpx;">
</view>