图片拉伸不变型

HTML

<div class="idd">
<!-- <img src="176.jpg"> -->
<span class="img"></span>
</div>

 

css

.idd{
100px;

height:100px;

border:1px solid red;

display:table-cell;

vertical-align:middle;

margin:20px 0;

}
.idd .img{
100%;

height:100%;

background-image:url(edit.jpg);

background-size:cover;

background-position:50%;

display:block;

overflow: hidden;
}