移动h5自适应布局直接拿去用

  • 2022-07-14 22:19:42

<!doctype html>
<html>
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
    <title>移动h5自适应布局</title>
    <style>
        /*320px布局*/
        html{font-size: 100px;}
        body{font-size: 0.14rem;/*实际相当于14px*/}
        body{
            padding:0;
            margin:0;
        }
        .div2{
            font-size:0.12rem;
        }
        .div3{
            width:3rem;
            height:3rem;
            
            border:1px solid #000;
            box-sizing:border-box;
        }
        .div4{
            margin-top:0.1rem;
            width:2rem;
            height:2rem;
            
            border:1px solid #000;
            box-sizing:border-box;
        }
        .img1{
            width:3.2rem;
        }
    </style>
</head>
<body>
    <div class="div2">动态更改html元素大小</div>
    <div class="" style="font-size:12px;">动态更改html元素大小</div>
    <div class="div3"></div>
    <div class="div4"></div>
    <img class="img1" src="http://www.baidu.com/img/bdlogo.png" alt="" />
</body>
<script>
// 该代码来自http://www.ghugo.com/mobile-h5-fluid-layout-for-iphone6/
(function (doc, win) {
    // 分辨率Resolution适配
    var docEl = doc.documentElement,
        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
        recalc = function () {
            var clientWidth = docEl.clientWidth;
            if (!clientWidth) return;
            docEl.style.fontSize = 100 * (clientWidth / 320) + 'px';
        };

    // Abort if browser does not support addEventListener
    if (!doc.addEventListener) return;
    win.addEventListener(resizeEvt, recalc, false);
    doc.addEventListener('DOMContentLoaded', recalc, false);
    
    // 一物理像素在不同屏幕的显示效果不一样。要根据devicePixelRatio来修改meta标签的scale,要注释上面的meta标签
    (function(){
        return;
        var dpr = scale =1;
         var isIPhone = win.navigator.appVersion.match(/iphone/gi);
        var devicePixelRatio = win.devicePixelRatio;
        if (isIPhone) {
            // iOS下,对于2和3的屏,用2倍的方案,其余的用1倍方案
            if (devicePixelRatio >= 3 && (!dpr || dpr >= 3)) {                
                dpr = 3;
            } else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)){
                dpr = 2;
            } else {
                dpr = 1;
            }
        } else {
            // 其他设备下,仍旧使用1倍的方案
            dpr = 1;
        }
           scale = 1 / dpr;
           
           // 
           var metaEl = "";
           metaEl = doc.createElement('meta');
        metaEl.setAttribute('name', 'viewport');
        metaEl.setAttribute('content', 'initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
        if (docEl.firstElementChild) {
            docEl.firstElementChild.appendChild(metaEl);
        } else {
            var wrap = doc.createElement('div');
            wrap.appendChild(metaEl);
            doc.write(wrap.innerHTML);
        }
    })();
        
})(document, window);    
</script>
</html>

 

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