动态算出二维码在白色框框内的位置

这个杀手好冷

于 2020-09-27 17:08:17 发布

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本文链接：https://blog.youkuaiyun.com/qq_43649479/article/details/108831920

版权

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html,body {
            width: 100%;
            height: 100%;
        }
        #app {
            background: url("a.jpg") no-repeat center center;
            background-size: 100% auto;
            min-height: 100%;
            height: 178vw;
            position: relative;
           background-color: #62ce94;
        }
        .b {
            position: absolute;
            left: 50%;
            -webkit-transform: translateX(-50%);
            transform: translatex(-50%);
        }
    </style>
</head>
<body>
<div id="app">
    <img src="b.png" alt="" class="b" :style="{'top': (320*index+p_y)+'px','width':180*index+'px'}">
</div>
<script src="vue.js"></script>
<script>
    new Vue({
        el: '#app',
        data: {
            index: 1,//缩放比例
            p_y: 0 //手机屏幕高度过大，背景图片高度不够
        },
        created:function(){
            let width = document.body.clientWidth;
            let height = document.body.clientHeight;
            if(height/width > 1068/600) {
                this.p_y = (height -  width/600*1068)/2
            } else {
                this.p_y = 0;
            }
            /*设置比例600*1068*/
            this.index=width/375;
        },
        updated:function(){

        }
    });
</script>
</body>
</html>