css来控制img正方形自适应

.div{
    width:100%;
    height:0px;
    padding-bottom:100%;
    position:relative;
} .div img{
        width:100%;
        height:100%;
        position:absolute;
        left:0;
        top:0;
}

 

转载于:https://www.cnblogs.com/gongshunkai/p/11573865.html