flex布局实现上下固定中间滑动的布局方式

<div class="main-warp">
    <div class="header">
      <img src="imgurl" class="header-img" alt>
    </div>
    <div class="content">
      <div class="content-scroll">
        <div class="shop-box">
          <img src="imgurl" alt>
        </div>
        <div class="shop-box">
          <img src="imgurl" alt >
        </div>
        <div class="shop-box">
          <img src="imgurl" alt >
        </div>
        <div class="shop-box">
          <img src="imgurl" alt >
        </div>
      </div>
    </div>
    <div class="footer"></div>
  </div>

<script>
import BScroll from 'better-scroll'
export default {
  data () {
    return {
      
    }
  },
 
  components: {
  },
  methods: {
 
  },
 
  computed: {
 
  },
 
  mounted () {
    this.$nextTick(function () {
      /* eslint-disable no-new */
      let pageBottom = document.querySelector('.content')
      new BScroll(pageBottom, { click: true })
    })
  },
  created () {
  }
}
</script>

<style lang="less"  rel="stylesheet/less" type="text/less">
@r: 100;
// 固定头部和尾部，中间部分可滑动，使用flex布局
 
// html,
body {
  background: url("//storage.jd.com/1901/04nianhuojie/02lingquanbg_02.png")
    repeat-y;
  background-size: 100%;
  height: 100%;
}
.main-warp {
  max-width: 750px;
  min-height: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  box-sizing: border-box;
  .header {
    height: 500rem / @r;
    .header-img {
      height: 500rem / @r;
    }
  }
  .content {
    flex: 1;
    width: 100%;
    overflow: hidden;
    // overflow: auto;
    // -webkit-overflow-scrolling: touch;
    .shop-box {
      margin: 50rem / @r 0;
      img {
        width: 106rem / @r;
      }
    }
  }
  .footer {
    background: url("//storage.jd.com/1901/04nianhuojie/fixbtnbg_02.png") repeat;
    background-size: 12rem / @r 11rem / @r;
    height: 82rem / @r;
    width: 100%;
    bottom: 0;
    color: #ffdeb8;
    font-size: 34rem / @r;
    line-height: 82rem / @r;
    text-align: center;
    font-weight: bolder;
    max-width: 750px;
  }
}
 
</style>