<view class="t_nav" style="height:{{height}}px">
<view style="height:{{h1}}px"></view>
<view class="contant" style="height:{{h2}}px">
<view>你好</view>
<view class="tab">ID:454545</view>
</view>
</view>
<!-- 用于顶开层的高 -->
<view style="height:{{height}}px"></view>
