.ios-wechat{
    position: fixed;
    height: 100%;
    width: 100%;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background:url('./../images/arrow.png') no-repeat;
    background-size: 30px 36px;
    background-position: right 16px top 8px;
    background-color: rgba(0, 0, 0, .8);
}
.ios-wechat p{
    position: absolute;
    right: 8px;
    top: 46px;
    color: #fff;
}