css弹性布局，自动换行，文本垂直水平居中

   /*父级*/
    .location-box{
        flex:1;
        background:#fff;
        display:flex;
        flex-wrap:wrap;  /*换行*/
    }

  /*子级*/
    .location-box .one-item{
        display:flex;
        width:19%;
        height:15%;
        margin:0.5%;
        align-items:center;
        justify-content:center;
        background:#ccc;
    }