loading 样式添加

.loading{
width:160px;
height:56px;
position: absolute;
top:50%;
left:50%;
line-height:56px;
color:#fff;
padding-left:60px;
font-size:15px;
background: #000 url(${base}/public/images/loader.gif) no-repeat 10px 50%;
opacity: 0.7;
z-index:9999;
-moz-border-radius:20px;
-webkit-border-radius:20px;
border-radius:20px;
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=70);

}

<div id="loading" class="loading" style="display: none;">数据加载中...</div>