[Vue]手机端设置背景图片的两种方式

<div class="wrap" >
   </div>

.wrap {
    width:100%;
    height:100%;
    position fixed;
    z-index -10
    background:url('~@/assets/images/teacher-indexBg.png')
    background-repeat: no-repeat;
    background-position: 0px 0px;
    background-size: 100% 100%;
}

<div class="wrap" >
    <img src="../../../src/assets/images/teacher-indexBg.png" class="back" id="Background">
</div>

.back{
     position: fixed;
     width: 100%;
     height: 100%;
     display: block;
     z-index: -100; 
 }