移动端开发之rem布局

最新推荐文章于 2023-05-15 15:00:24 发布

原创最新推荐文章于 2023-05-15 15:00:24 发布 · 774 阅读

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#移动端开发 #rem

本文详细介绍了一种流行的移动端网页布局方式——rem布局。通过实例代码展示了HTML结构、CSS样式及JavaScript兼容处理等内容，并提供了常见设置技巧。

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移动端开发之rem布局

今天，博主带来的分享是移动端开发之rem布局！先来贴下效果把！移动端设备为iphone6

代码如下：

主要有四部分，HTML部分，CSS部分，浏览器以及设备兼容部分，常用设置部分！

第一部分：HTML部分：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="style/reset.css" type="text/css">
    <link rel="stylesheet" href="style/common.css" type="text/css">
    <script src="mobile-util.js"></script>
  
</head>
<body>
    <header></header>
    <div class="banner">
        <ul class="list">
            <li><img src="img/1.jpg" alt=""></li>
            <li><img src="img/2.jpg" alt=""></li>
            <li><img src="img/3.jpg" alt=""></li>
            <li><img src="img/4.jpg" alt=""></li>
            <li><img src="img/5.jpg" alt=""></li>
        </ul>
        <ol class="num">
            <li class="current"></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ol>
    </div>
    <main>
        <nav class="gBox">
            <ul class="clearfix">
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
                <li><a href="#"><i></i>文字那</a></li>
            </ul>
        </nav>
        <div class="gBox item">
            <div class="item_tit"><h5>全网最低价</h5></div>
            <div class="yao">
                <a href="" class="big l t"><img src="img/a1.jpg" class="autoImg"></a>
                <a href="" class="small t r"><img src="img/a2.jpg" class="autoImg"></a>
                <a href="" class="sm2 b r"><img src="img/a3.jpg" class="autoImg "></a>
            </div>
    
        </div>
        <br><br><br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
    </main>
    
   
   
  
</body>
</html>

第二部分：CSS部分：

@charset "utf-8";

header{
    height: 1.5rem;
    position: fixed;
    z-index: 2;
    left: 0;
    top: 0;
    width: 100%;
    background-image: linear-gradient(to bottom,rgba(0,0,0,.5),rgba(0,0,0,.2));
}
.banner{
    position: relative;
    overflow: hidden;
    z-index: 1;
}
.list{
    width: 500%;
}
.list li{
    float: left;
}
.list img{
    width: 16rem;
}
.num{
    position: absolute;
    right: .3rem; bottom: .3rem;
}
.num li{
    float: left;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: solid 2px #f00;
    /*box-sizing: border-box;*/
    margin-left: 5px;
}
.num .current{
    background-color: #f00;
}
main{
    padding: .5rem .25rem;
}
.gBox{
    background-color: #fff;
    border: solid 1px #ccc;
    box-shadow: 0 1px 3px rgba(0,0,0,.5);
    font-size: .5rem;
}
nav{
    text-align: center;
    padding-bottom: .5rem;
}
nav li{
    width: 25%;
    float: left;
}
nav i{
    display: block;
    height: 2.5rem;
    width: 2.5rem;
    background-image: url(../img/n1.jpg);
    background-position: 0 0;
    background-repeat: no-repeat;
    background-size: cover;
    margin: .5rem auto .25rem;
}
nav a{
    display: inline-block;
}

item_tit{
  
 padding:  0.35rem;

}
.item_tit h5{
    height:0.65rem;
    font-size: 0.65rem;
    padding:0.5rem;
    border-left:solid 4px #0088cc;
    line-height: 1;
    font-weight: normal;
   background-color: aqua;
  
}
.yao{
    height:8.575rem;
    position: relative;
    background-color: #ccc;

}
.big{
    position: absolute;
    width: 7.65rem;
}
.autoImg{width:100%;}
.small{
    position: absolute;
    width:7.8rem;
}
.l{
    left:0;
}
.t{
    top:0;
}
.r{
    right:0;
}
.b{
    bottom:0;
}
.sm2{
   position: absolute;
    height: 4.35rem;
    width:7.8rem;
}

第三部分：设备兼容部分，使用的是JS：

window.mobileUtil = (function(win, doc) {
    var UA = navigator.userAgent,
        isAndroid = /android|adr/gi.test(UA),
        isIos = /iphone|ipod|ipad/gi.test(UA) && !isAndroid, // 据说某些国产机的UA会同时包含 android iphone 字符
        isMobile = isAndroid || isIos;  // 粗略的判断

    return {
        isAndroid: isAndroid,
        isIos: isIos,
        isMobile: isMobile,

        isNewsApp: /NewsApp\/[\d\.]+/gi.test(UA),
        isWeixin: /MicroMessenger/gi.test(UA),
        isQQ: /QQ\/\d/gi.test(UA),
        isYixin: /YiXin/gi.test(UA),
        isWeibo: /Weibo/gi.test(UA),
        isTXWeibo: /T(?:X|encent)MicroBlog/gi.test(UA),

        tapEvent: isMobile ? 'tap' : 'click',

        /**
         * 缩放页面
         */
        fixScreen: function() {
            var metaEl = doc.querySelector('meta[name="viewport"]'),
                metaCtt = metaEl ? metaEl.content : '',
                matchScale = metaCtt.match(/initial\-scale=([\d\.]+)/),
                matchWidth = metaCtt.match(/width=([^,\s]+)/);

            if ( !metaEl ) { // REM
                var docEl = doc.documentElement,
                    maxwidth = docEl.dataset.mw || 750, // 每 dpr 最大页面宽度
                    dpr = isIos ? Math.min(win.devicePixelRatio, 3) : 1,
                    scale = 1 / dpr,
                    tid;

                docEl.removeAttribute('data-mw');
                docEl.dataset.dpr = dpr;
                metaEl = doc.createElement('meta');
                metaEl.name = 'viewport';
                metaEl.content = fillScale(scale);
                docEl.firstElementChild.appendChild(metaEl);

                var refreshRem = function() {
                    var width = docEl.getBoundingClientRect().width;
                    if (width / dpr > maxwidth) {
                        width = maxwidth * dpr;
                    }
                    var rem = width / 16;
                    docEl.style.fontSize = rem + 'px';
                };

                win.addEventListener('resize', function() {
                    clearTimeout(tid);
                    tid = setTimeout(refreshRem, 300);
                }, false);
                win.addEventListener('pageshow', function(e) {
                    if (e.persisted) {
                        clearTimeout(tid);
                        tid = setTimeout(refreshRem, 300);
                    }
                }, false);

                refreshRem();
            } else if ( isMobile && !matchScale && ( matchWidth && matchWidth[1] != 'device-width' ) ) { // 定宽
                var width = parseInt(matchWidth[1]),
                    iw = win.innerWidth || width,
                    ow = win.outerWidth || iw,
                    sw = win.screen.width || iw,
                    saw = win.screen.availWidth || iw,
                    ih = win.innerHeight || width,
                    oh = win.outerHeight || ih,
                    ish = win.screen.height || ih,
                    sah = win.screen.availHeight || ih,
                    w = Math.min(iw,ow,sw,saw,ih,oh,ish,sah),
                    scale = w / width;

                if ( scale < 1 ) {
                    metaEl.content = metaCtt + ',' + fillScale(scale);
                }
            }

            function fillScale(scale) {
                return 'initial-scale=' + scale + ',maximum-scale=' + scale + ',minimum-scale=' + scale + ',user-scalable=no';
            }
        },

        /**
         * 转href参数成键值对
         * @param href {string} 指定的href，默认为当前页href
         * @returns {object} 键值对
         */
        getSearch: function(href) {
            href = href || win.location.search;
            var data = {},reg = new RegExp( "([^?=&]+)(=([^&]*))?", "g" );
            href && href.replace(reg,function( $0, $1, $2, $3 ){
                data[ $1 ] = $3;
            });
            return data;
        }
    };
})(window, document);

// 默认直接适配页面
mobileUtil.fixScreen();

第四部分：常用的设置，比如字体，清楚浮动，等等

@charset "UTF-8";

html { font-family: sans-serif; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; overflow-y: scroll; -webkit-overflow-scrolling: touch; }
body { margin: 0; font-size: 14px; line-height: 1.5; color: #333; background-color: #fff; }
a { background: transparent; text-decoration: none; color: #08c; }
a:active,a:hover { outline: 0; }
a:hover { color: #006699; }
img { border: none; vertical-align: middle; -ms-interpolation-mode: bicubic; }
button,input,optgroup,select,textarea { color: inherit; font: inherit; margin: 0; }
button,select { text-transform: none; }
button,html input[type="button"],input[type="reset"],input[type="submit"] { -webkit-appearance: button; cursor: pointer; *overflow: visible; }
button[disabled],html input[disabled] { cursor: default; }
button::-moz-focus-inner,input::-moz-focus-inner { border: 0; padding: 0; }
input { line-height: normal; }
input[type="checkbox"],
input[type="radio"] { box-sizing: border-box; padding: 0; *height: 13px; *width: 13px; }
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { height: auto; }
input[type="search"] { -webkit-appearance: textfield; box-sizing: content-box; }
input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-decoration { -webkit-appearance: none; }
input { margin: 0; padding: 0; border: none; background-color: transparent; outline: none; }
textarea { overflow: auto; resize: vertical; resize: none; }
table { border-collapse: collapse; border-spacing: 0; }
td,th { padding: 0; }
html,button,input,select,textarea { font-family: "Microsoft Yahei", "微软雅黑", "SimSun", "宋体", "Verdana", "Arial"; }
h1,h2,h3,h4,h5,h6,p,figure,form,blockquote { margin: 0; }
ul,ol,dl,dd { margin: 0; padding: 0; }
ul,ol { list-style: none outside none; }
h1,h2,h3 { line-height: 2; font-weight: normal; }
h1 { font-size: 21px; }
h2 { font-size: 18px; }
h3 { font-size: 16px; }
h4 { font-size: 14px; }
h5,h6 { font-size: 12px; text-transform: uppercase; }
input:-moz-placeholder,textarea:-moz-placeholder { color: #ccc; }
input::-moz-placeholder,textarea::-moz-placeholder { color: #ccc; }
input:-ms-input-placeholder,textarea:-ms-input-placeholder { color: #ccc; }
input::-webkit-input-placeholder,textarea::-webkit-input-placeholder { color: #ccc; }
a { blr: expression(this.onFocus=this.blur())}
a { outline: none; }
em,i { font-style: normal; }
.clearfix:before,.clearfix:after { content: ""; display: table; }
.clearfix:after { clear: both; }
.clearfix { *zoom: 1; }
.fl { float: left; }
.fr { float: right; }

好了，这次的分享到这里就结束了！