说明，略
wxml
<!--pages/start/start.wxml-->
<view class='page-body'>
<image class='start' src='/images/start.jpg'>
<view class='containr-view'>
<view class='btn-view'>
<van-button class='start-btn' size="large" plain round type="default" open-type="getUserInfo">立即体验</van-button>
</view>
</view>
</image>
</view>
wxss
/* pages/start/start.wxss */
.page-body{
width: 100%;
height: 100%;
}
.containr-view{
position: absolute;
width: 100%;
height: 200px;
/* background: red; */
text-align: center;
top: 60%;
}
.btn-view{
/* background: blue; */
margin-left: auto;
margin-right: auto;
width: 33%;
height: 10px;
}
.start{
width: 100%;
height: 100%;
position: relative;
align-items: center;
}
