css 无消息时背景完全居中

//html
<div>
    <img class="noImgView" src="../assets/noMessage.png" />
    <div class="nomedication">暂时没有收到消息哦！</div>
</div>
//css
.noImgView{
        position: absolute;
        top: 50%;
        left: 50%;
        width: 130px;
        height: 130px;
        margin-left:-65px;
        margin-top: -100px;
    }
  .nomedication{
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: 50px;
        margin-left:-60px;
        color: #b2b2b2;
  }