移动端开发案例（流式布局）

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最新推荐文章于 2023-02-12 16:23:13 发布

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分类专栏：移动端开发文章标签： css3 html5

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本文详细解析了京东APP主页的HTML结构，包括头部导航、搜索框、轮播图、品牌日活动区、导航菜单和新闻模块等关键部分的设计与实现。

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在这里插入图片描述

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="CSS/index.css">
    <title>主页</title>
    <style>

    </style>
</head>

<body>
    <header class="app">
        <ul>
            <li>
                <img src="images/close.png" alt="">
            </li>
            <li>
                <img src="images/logo.png" alt="">
            </li>
            <li>
                打开京东APP，购物更轻松
            </li>
            <li>立即打开</li>
        </ul>
    </header>
    <!-- 搜索 -->
    <div class="search-wrap">
        <div class="search-btn">
        </div>
        <div class="search">
            <div class="jd-icon"></div>
            <div class="sou"></div>
        </div>
        <div class="search-login">
            登陆
        </div>

    </div>
    <!-- 主题内容部分 -->
    <div class="mainContent">
        <!-- 滑动图 -->
        <div class="slider">
            <img src="upload/banner.dpg" alt="">
        </div>
        <!-- 蔡康永 品牌日 -->
        <div class="brand">
            <div>
                <a href="#">
                    <img src="upload/pic1.dpg" alt="">
                </a>

            </div>
            <div>
                <a href="#">
                    <img src="upload/pic2.dpg" alt="">
                </a>

            </div>
            <div>
                <a href="#">
                    <img src="upload/pic3.dpg" alt="">
                </a>

            </div>
        </div>
        <nav>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav2.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
            <a href="">
                <img src="upload/nav1.webp" alt="">
                <span>京东超市</span>
            </a>
        </nav>
        <!-- 新闻模块 -->
        <div class="news">
            <a href="#">
                <img src="upload/new1.dpg" alt="">
            </a>
            <a href="#">
                <img src="upload/new2.dpg" alt="">
            </a>
            <a href="#">
                <img src="upload/new3.dpg" alt="">
            </a>
        </div>
    </div>
</body>

</html>

body {
    margin: 0 auto;
    width: 100%;
    min-width: 320px;
    max-width: 640px;
    font-size: 14px;
    color: #666;
    font-family: -apple-system, Helvetica, sans-serif;
    line-height: 1.5;
    background-color: #ccc;
    height: 2000px;
}

.app {
    width: 100%;
    height: 45px;
}

.app ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    color: #666;
    text-decoration: none;
}

img {
    /* 去除图片底部的空白缝隙 */
    vertical-align: middle;
}

.app ul li {
    float: left;
    height: 45px;
    background-color: #333333;
    text-align: center;
    line-height: 45px;
    color: #fff;
}

.app ul li:nth-child(1) {
    width: 8%;
}

.app ul li:nth-child(1) img {
    width: 10px;
}

.app ul li:nth-child(2) {
    width: 10%;
}

.app ul li:nth-child(2) img {
    width: 30px;
    /* img也是行内块元素 */
    /* 出现行内块的情况，因为图片默认和文字的基线对齐，所以要对其进行设置，使文字和图片居中对齐 */
    vertical-align: middle;
}

.app ul li:nth-child(3) {
    width: 57%;
}

.app ul li:nth-child(4) {
    width: 25%;
    background-color: #E1251B;
}

.search-wrap {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 44px;
    min-width: 320px;
    max-width: 640px;
}

.search-btn::before {
    content: "";
    display: block;
    width: 20px;
    height: 18px;
    background: url(../images/s-btn.png);
    background-size: 20px 18px;
    /* 用magin的原因是因为是背景图片 不能居中 */
    margin: 14px 0 0 15px;
}

.search-btn {
    width: 40px;
    height: 44px;
    position: absolute;
    top: 0;
    left: 0;
    /* background-color: pink; */
}

.search-login {
    width: 40px;
    height: 44px;
    position: absolute;
    top: 0;
    right: 0;
    /* background-color: purple; */
    line-height: 44px;
    /* text-align: center; */
    color: #fff;
}

.search {
    position: relative;
    height: 30px;
    background-color: white;
    margin: 0 50px;
    border-radius: 15px;
    margin-top: 7px;
}

.jd-icon {
    width: 20px;
    height: 15px;
    position: absolute;
    top: 8px;
    left: 13px;
    background: url(../images/jd.png) no-repeat;
    background-size: 20px 15px;
}

.jd-icon::after {
    content: "";
    position: absolute;
    right: -20px;
    display: block;
    width: 1px;
    height: 15px;
    background-color: #ccc;
}

.sou {
    position: absolute;
    top: 8px;
    left: 55px;
    /* 精灵图2倍图的做法 */
    width: 18px;
    height: 15px;
    background: url(../images/jd-sprites.png) no-repeat -81px 0;
    background-size: 200px auto;
}

.slider img {
    /* 跟父亲一样宽 */
    width: 100%;
}


/* 品牌日 */

.brand {
    /* 对盒子切割没有对图片切割，用overflow: hidden;把多余的图片切割 */
    overflow: hidden;
    border-radius: 10px 10px 0 0;
}

.brand div {
    float: left;
    width: 33.33%;
}

.brand div img {
    width: 100%;
}

nav {
    padding-top: 5px;
}

nav a {
    float: left;
    width: 20%;
    text-align: center;
}

nav a img {
    width: 40px;
    margin: 10px 0;
}

nav a span {
    display: block;
}


/* news */

.news a {
    margin-top: 20px;
    float: left;
    /* C3盒子模型 可以把border放进去  并不影响布局也不用加减边距，内外边框 */
    box-sizing: border-box;
}

.news a:nth-child(1) {
    width: 50%;
    border-left: 1px solid #ccc;
}

.news img {
    width: 100%;
}


/* .news a:nth-child(2),
.news a:nth-child(3) {
    width: 25%;
} */


/* 公式   从第2个往后面选*/

.news a:nth-child(n+2) {
    width: 25%;
}