css目录拖动避免被底部遮挡住和兼容显示屏长1点

.container{
  position:relative;
  background:url(../img/chooseBg.jpg) no-repeat center center;
  background-size:cover;
  width:100%;
  height:100%;
  //.listConHeight{
  //   height:9rem;
  //  overflow:auto;
  //}
  .listConHeight {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding-top: 1.3rem;
    box-sizing: border-box;
    ul {
      width:6.78rem;
      height: 100%;
      margin:0 auto;
      overflow: auto;
      -webkit-overflow-scrolling: touch;
    }
  }