2021-07-29 11:08:52 +08:00
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---
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title: 02-CSS基础练习：JD首页的制作（快捷导航部分）
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publish: true
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---
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<ArticleTopAd></ArticleTopAd>
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2018-01-24 16:35:19 +08:00
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我们在上一篇文章中制作的网页最顶部的导航，是属于网页导航。
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本文中，Banner图上方的导航，叫做**快捷导航**（shortcut）。
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##快捷导航的骨架
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我们先制作快捷导航的骨架。如下图所示：
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上图中，`shortcut-nav-menu-all`和`shortcut-nav-menu-one`都是属于`shortcut-nav-menu`部分，只不过，后者是将父亲撑破了。
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为了实现上图，对应的html代码如下：
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```html
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<!--shortcut-nav部分start-->
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<div class="shortcut-nav">
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<div class="w">
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<div class="shortcut-nav-menu">
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<div class="shortcut-nav-menu-all">
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<a href="#">全部商品分类</a>
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</div>
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<div class="shortcut-nav-menu-one" style="color: #fff">
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下一段再讲
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</div>
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</div>
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<div class="shortcut-nav-items">
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<ul>
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<li><a href="#">服装城</a></li>
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<li><a href="#">美妆馆</a></li>
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<li><a href="#">京东超市</a></li>
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<li><a href="#">生鲜</a></li>
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<li><a href="#">全球购</a></li>
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<li><a href="#">闪购</a></li>
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<li><a href="#">团购</a></li>
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<li><a href="#">拍卖</a></li>
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<li><a href="#">金融</a></li>
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</ul>
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</div>
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<div class="shortcut-nav-img">
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<a href="#">
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<img src="images/img2.jpg"/>
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</a>
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</div>
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</div>
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</div>
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<!--shortcut-nav部分end-->
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```
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css代码如下：
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```css
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/*shortcut-nav部分start*/
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.shortcut-nav {
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height: 44px;
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border-bottom: 2px solid #B1191A;
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}
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.shortcut-nav-menu { /*撑开和撑破是两回事：撑开说明盒子变成那么大，撑破盒子还是那么大，子盒子很大。子盒子shortcut-nav-menu-one把父亲撑破了*/
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width: 210px;
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height: 44px; /*浮动的盒子相互影响，不过是否在同一个盒子中*/
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float: left;
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position: relative;
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z-index: 1; /*通过z-index属性将层级放到最高*/
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}
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.shortcut-nav-menu-all a {
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display: block;
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width: 190px;
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height: 44px;
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color: white;
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padding: 0 10px;
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background-color: #B1191A;
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font: 400 15px/44px "microsoft yahei";
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}
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.shortcut-nav-menu-one {
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height: 465px;
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margin-top: 2px;
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background-color: #C81623;
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border-left: 1px solid #B1191A;
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border-bottom: 1px solid #B1191A;
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/*border-left: 1px solid #000;*/
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/*border-bottom: 1px solid #000;*/
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}
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.shortcut-nav-items {
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width: 730px;
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height: 44px;
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float: left;
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}
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.shortcut-nav-items li {
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float: left;
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}
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.shortcut-nav-items a {
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display: inline-block;
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height: 44px;
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padding: 0 20px;
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color: #333;
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font: 400 16px/44px "microsoft yahei";
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}
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.shortcut-nav-items a:hover {
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color: #C81623;
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}
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.shortcut-nav-img {
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width: 200px;
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height: 44px;
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float: right;
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margin-top: -10px;
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margin-right: 50px;
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/*position: relative;*/
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/*left: -50px;*/
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/*top: -10px;*/
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}
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/*shortcut-nav部分end*/
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```
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## 具体的商品分类
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商品的具体分类即`shortcut-nav-menu-one`部分，我们来实现这部分的代码。要求实现的效果如下：
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我们在上面的代码中已经给`shortcut-nav-menu-one`设置了一些属性（例如给左边和下边增加一个像素的红色边框），在此基础之上，需要新增的代码如下：
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html代码：
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```html
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<!--具体的商品分类start-->
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<div class="shortcut-nav-menu-one" style="color: #fff">
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<ul>
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<li>
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<a href="">家用电器</a>
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<i>></i>
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</li>
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<li>
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<a href="">手机</a>
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<span>、</span>
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<a href="">数码</a>
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<i>></i>
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</li>
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<li>
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<a href="">电脑</a>
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<span>、</span>
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<a href="">办公</a>
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<i>></i>
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</li>
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<li>
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<a href="">家居</a>
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<span>、</span>
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<a href="">家具</a>
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<i>></i>
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</li>
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<li>
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<a href="">男装</a>
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<span>、</span>
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<a href="">女装</a>
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<i>></i>
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</li>
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<li></li>
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<li></li>
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<li></li>
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<li></li>
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<li></li>
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</ul>
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</div>
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<!--具体的商品分类end-->
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```
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css部分如下：
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```css
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/*具体的商品分类start*/
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.shortcut-nav-menu-one ul {
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font: 400 14px/31px "microsoft yahei"; /*字体属性具有继承性，让儿子 a 具有此继承性*/
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}
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.shortcut-nav-menu-one li {
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padding-left: 10px;
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position: relative;
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}
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.shortcut-nav-menu-one a{
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color: #fff;
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}
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.shortcut-nav-menu-one i {
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right: 10px;
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position: absolute;
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}
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.shortcut-nav-menu-one li:hover {
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background-color: #fff;
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}
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.shortcut-nav-menu-one li:hover a,span,i{
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color: #C81623;
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}
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/*具体的商品分类end*/
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```
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## 轮播图slider + 京东快报
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接下来，我们要实现下面这个部分：
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组成部分包括：左侧的轮播图、右侧的京东快报 & 充话费 & 右下角的小海报。
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结构如下：
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```html
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<!--main部分start-->
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<div class="main">
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<div class="w">
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<div class="main-slider">
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</div>
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<div class="main-news">
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<div class="main-news-top"> <!--京东快报+充话费-->
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<div class="main-news-top-faster"> <!--京东快报-->
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</div>
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<div class="main-news-top-money"> <!--充话费-->
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</div>
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</div>
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<div class="main-news-bottom">
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</div>
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</div>
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</div>
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</div>
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<!--main部分end-->
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```
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我们依次来讲解。
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### 1、轮播图：main-slider
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首页的banner图是首页独有的，所以这部分的css代码要写在index.css里，不要写在base.css里。
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html代码如下：
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```html
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<!--main部分start-->
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<div class="main">
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<div class="w">
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<div class="main-slider">
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<a href="">
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<img src="images/slider.jpg" alt="">
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</a>
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<ul> <!--指示点-->
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<li>1</li>
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<li>2</li>
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<li>3</li>
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<li>4</li>
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<li>5</li>
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<li>6</li>
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</ul>
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<a href="javascript:;" class="arrow-left"><</a> <!--左边的箭头-->
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<a href="javascript:;" class="arrow-right">></a> <!--右边的箭头-->
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</div>
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</div>
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</div>
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<!--main部分end-->
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```
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注意：超链接 a 标签中，`href="javascript:;`表示点击超链接时，什么都不做。
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CSS代码如下：
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```css
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.main-slider {
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float: left;
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margin: 12px 0 0 220px;
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width: 730px;
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height: 454px;
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position: relative;
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}
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.main-slider ul {
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position: absolute;
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bottom: 10px;
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left: 50%;
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margin-left: -66px;
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}
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.main-slider ul li {
|
|
|
|
|
|
float: left;
|
|
|
|
|
|
width: 18px;
|
|
|
|
|
|
height: 18px;
|
|
|
|
|
|
color: #fff;
|
|
|
|
|
|
background-color: #3E3E3E;
|
|
|
|
|
|
border-radius: 50%; /*圆角矩形*/
|
|
|
|
|
|
line-height: 18px;
|
|
|
|
|
|
text-align: center; /*让 li 里面的文本水平方向居中*/
|
|
|
|
|
|
margin: 0 2px;
|
|
|
|
|
|
cursor: pointer; /*鼠标悬停时变成小手*/
|
|
|
|
|
|
}
|
|
|
|
|
|
|
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|
|
|
|
.main-slider .arrow-left { /* 轮播图左侧的箭头*/
|
|
|
|
|
|
position: absolute;
|
|
|
|
|
|
top: 50%;
|
|
|
|
|
|
margin-top: -31px;
|
|
|
|
|
|
left: 0px;
|
|
|
|
|
|
width: 28px;
|
|
|
|
|
|
height: 62px;
|
|
|
|
|
|
background-color: rgba(0,0,0,0.3);
|
|
|
|
|
|
color: #fff;
|
|
|
|
|
|
font: 400 22px/62px "sumsun";
|
|
|
|
|
|
text-align: center;
|
|
|
|
|
|
border-radius: 10px 0 0 10px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-slider .arrow-left:hover {
|
|
|
|
|
|
background-color: rgba(0,0,0,0.7);
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-slider .arrow-right { /*轮播图右侧的箭头*/
|
|
|
|
|
|
position: absolute;
|
|
|
|
|
|
top: 50%;
|
|
|
|
|
|
margin-top: -31px;
|
|
|
|
|
|
right: 0px;
|
|
|
|
|
|
width: 28px;
|
|
|
|
|
|
height: 62px;
|
|
|
|
|
|
background-color: pink;
|
|
|
|
|
|
background-color: rgba(0,0,0,0.3);
|
|
|
|
|
|
color: #fff;
|
|
|
|
|
|
font: 400 22px/62px "sumsun";
|
|
|
|
|
|
text-align: center;
|
|
|
|
|
|
border-radius: 10px 0 0 10px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-slider .arrow-right:hover {
|
|
|
|
|
|
background-color: rgba(0,0,0,0.7);
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
代码解释如下；
|
|
|
|
|
|
|
|
|
|
|
|
（1）轮播图，我们采取的方式是：在超链接 a 里面放一个img标签。
|
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|
|
|
|
|
|
|
|
|
（2）指示点：在一个ul中放多个li。然后通过绝对定位的方式，让ul放在轮播图的正中间（水平方向）。最后详细设置每个指示点li的属性（比如，`text-align: center`属性可以让li里面的文字水平居中）。
|
|
|
|
|
|
|
|
|
|
|
|
（3）左右两边的箭头：鼠标悬停时，颜色不同。我们通过`background-color: rgba(0,0,0,0.3)`设置背景的透明度。
|
|
|
|
|
|
|
|
|
|
|
|
最终实现的效果如下：
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
### 京东快报
|
|
|
|
|
|
|
|
|
|
|
|
html代码如下：
|
|
|
|
|
|
|
|
|
|
|
|
```html
|
|
|
|
|
|
<div class="main-news-top-faster"> <!--京东快报-->
|
|
|
|
|
|
<div class="main-news-top-faster-title">
|
|
|
|
|
|
<h2>京东快报</h2>
|
|
|
|
|
|
<a href="#">更多 ></a>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
<div class="main-news-top-faster-content">
|
|
|
|
|
|
<ul>
|
|
|
|
|
|
<li><span>[特惠]</span>新闻1</li>
|
|
|
|
|
|
<li><span>[公告]</span>新闻2</li>
|
|
|
|
|
|
<li><span>[特惠]</span>新闻3</li>
|
|
|
|
|
|
<li><span>[公告]</span>新闻4</li>
|
|
|
|
|
|
<li><span>[特惠]</span>新闻5</li>
|
|
|
|
|
|
</ul>
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
css代码如下；
|
|
|
|
|
|
|
|
|
|
|
|
```css
|
|
|
|
|
|
.main-news-top-faster {
|
|
|
|
|
|
height: 163px;
|
|
|
|
|
|
border-bottom: 1px dashed #E4E4E4; /*虚线*/
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-faster-title {
|
|
|
|
|
|
height: 32px;
|
|
|
|
|
|
line-height: 32px;
|
|
|
|
|
|
border-bottom: 1px dotted #E8E8E8; /*点线*/
|
|
|
|
|
|
padding: 0 15px;
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-faster-title h2{
|
|
|
|
|
|
float: left;
|
|
|
|
|
|
font: 400 16px/32px "microsoft yahei";
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-faster-title a {
|
|
|
|
|
|
float: right;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-faster-content {
|
|
|
|
|
|
padding: 5px 0 0 15px;
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-faster-content li {
|
|
|
|
|
|
line-height: 24px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-faster-content span {
|
|
|
|
|
|
font-weight: 700;
|
|
|
|
|
|
margin-right: 5px;
|
|
|
|
|
|
color: #666;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-money ul {
|
|
|
|
|
|
width: 250px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
### 3、充话费部分：12个单元格（重要）
|
|
|
|
|
|
|
|
|
|
|
|
**（1）步骤一：**画表格
|
|
|
|
|
|
|
|
|
|
|
|
充话费这部分，我们不用table标签来做，一般table标签一般是用来放文字的。这里因为有图片，所以我们用ul标签来做，在ul里放12个浮动的li。
|
|
|
|
|
|
|
|
|
|
|
|
如果我们直接这样进行设置：
|
|
|
|
|
|
|
|
|
|
|
|
```css
|
|
|
|
|
|
.main-news-top-money ul {
|
|
|
|
|
|
width: 250px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-money li {
|
|
|
|
|
|
width: 62px;
|
|
|
|
|
|
height: 70px;
|
|
|
|
|
|
border: 1px solid #E8E8E8;
|
|
|
|
|
|
float: left;
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
会发现，效果不尽人意：
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
上图所示，我们发现，红框部分的12个li，并没有按照我们预期的那样进行排列。因为每个li有border。真实的li当中，它们的border是有重叠的。
|
|
|
|
|
|
|
|
|
|
|
|
解决办法：
|
|
|
|
|
|
|
|
|
|
|
|
> 父亲宽度不够时，为了让盒子浮动不掉下去，可以给子盒子之上父盒子之下再给一个盒子，让它的宽度略大于父亲的宽度即可。
|
|
|
|
|
|
|
|
|
|
|
|
比如这里，**本身这个区域整体的宽度是250，我们就设置ul的宽度是260px即可（**满足的条件是：li的宽度*4 < **ul的宽度** < li的宽度*5）。
|
|
|
|
|
|
|
|
|
|
|
|
ul的宽度设置为260px之后发现，最右边和最下面的部分会多出来：
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
我们可以给`main-news-top-money`设置`overflow: hidden`，将多余的部分切掉（这是没有办法的事情）。
|
|
|
|
|
|
|
|
|
|
|
|
于是乎，充话费这部分的代码如下：
|
|
|
|
|
|
|
|
|
|
|
|
html部分：
|
|
|
|
|
|
|
|
|
|
|
|
```html
|
|
|
|
|
|
<div class="main-news-top-money"> <!--充话费-->
|
|
|
|
|
|
<ul>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
<li></li>
|
|
|
|
|
|
</ul>
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
css部分：
|
|
|
|
|
|
|
|
|
|
|
|
```css
|
|
|
|
|
|
.main-news-top-money ul {
|
|
|
|
|
|
width: 260px; /*让宽度略大于整体的宽度250px*/
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.main-news-top-money li {
|
|
|
|
|
|
width: 62px;
|
|
|
|
|
|
height: 70px;
|
|
|
|
|
|
border: 1px solid #E8E8E8;
|
|
|
|
|
|
float: left;
|
|
|
|
|
|
border-top: 0; /* 将每个单元格的上边框去掉，因为跟单元格的下边框重合了。*/
|
|
|
|
|
|
margin-top: -1px; /* 整体向上移动一个单位，因为边框重合了*/
|
|
|
|
|
|
margin-left: -1px ;/* 整体向左移动一个单位，因为边框重合了*/
|
|
|
|
|
|
}
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
这样的话，表格就画好了：
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
**（2）步骤二：**往表格里填充内容
|
|
|
|
|
|
|
|
|
|
|
|
接下来，我们往表格里填充内容。最终，充话费部分的代码如下：
|
|
|
|
|
|
|
|
|
|
|
|
html部分：
|
|
|
|
|
|
|
|
|
|
|
|
```html
|
|
|
|
|
|
<div class="main-news-top-money"> <!--充话费-->
|
|
|
|
|
|
<ul>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i class="main-news-top-money-icon2"></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>机票</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li>
|
|
|
|
|
|
<a href="">
|
|
|
|
|
|
<i></i> <!--单元格里的图片-->
|
|
|
|
|
|
<span>话费</span>
|
|
|
|
|
|
</a>
|
|
|
|
|
|
</li>
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<li>
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<a href="">
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<i></i> <!--单元格里的图片-->
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<span>话费</span>
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</a>
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</li>
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</ul>
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</div>
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```
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index.css部分：
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```css
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/*充话费部分start*/
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.main-news-top-money {
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overflow: hidden; /*将多余的部分切掉*/
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}
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.main-news-top-money ul {
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width: 260px; /*让宽度略大于整体的宽度250px*/
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}
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.main-news-top-money li {
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width: 62px;
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height: 70px;
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border: 1px solid #E8E8E8;
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float: left;
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border-top: 0; /* 将每个单元格的上边框去掉，因为跟单元格的下边框重合了。*/
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margin-top: -1px; /* 整体向上移动一个单位，因为边框重合了*/
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margin-left: -1px ;/* 整体向左移动一个单位，因为边框重合了*/
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}
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.main-news-top-money li a {
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display: block;
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width: 62px;
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height: 30px;
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padding-top: 40px;
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text-align: center;
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line-height: 30px;
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position: relative;
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}
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.main-news-top-money li a i {
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width: 25px;
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height: 25px;
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position: absolute;
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top: 13px;
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left: 18px;
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background: url("../images/fly.png") right top;
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}
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.main-news-top-money .main-news-top-money-icon2 {
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background: url("../images/fly.png") right -25px;
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}
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/*充话费部分end*/
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```
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代码解释：
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- 单元格里的文字：我们可以给单元格里的文字设置padding-top，保证文字位于单元格的底部。
|
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- 单元格里的图片（精灵图）的位置：通过子绝父相的方式（子是图片`<i>`本身，相是每个单元格里的超链接文字`<a>`）。通过子绝父相的方式定位之后，发现精灵图都是一样的图标，目前的处理办法是：手动添加不同的class进行修改精灵图，以后等我们学习js了，就不用这么麻烦了。
|
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画出的表格如下：
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|
|
## 今日推荐
|
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|
接下来，我们开始做下面这部分：
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上图中的“今日推荐”，标签可以这样布局：ul > li > a > img
|
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|
为了防止这部分的内容跑到上面去，我们可以给上面的`class-main`部分清除浮动。
|
|
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|
“今日推荐”这部分的代码如下。
|
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|
html代码如下：
|
|
|
|
|
|
|
|
|
|
|
|
```html
|
|
|
|
|
|
<!--今日推荐start-->
|
|
|
|
|
|
<div class="today">
|
|
|
|
|
|
<div class="w clearfix">
|
|
|
|
|
|
<div class="today-left fl">
|
|
|
|
|
|
<a href=""></a>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
<div class="today-right">
|
|
|
|
|
|
<ul>
|
|
|
|
|
|
<li><a href=""><img src="images/today1.jpg" alt=""></a></li>
|
|
|
|
|
|
<li><a href=""><img src="images/today2.jpg" alt=""></a></li>
|
|
|
|
|
|
<li><a href=""><img src="images/today3.jpg" alt=""></a></li>
|
|
|
|
|
|
<li><a href=""><img src="images/today4.jpg" alt=""></a></li>
|
|
|
|
|
|
</ul>
|
|
|
|
|
|
<a href="javascript:;" class="arrow-left"><</a> <!--左边的箭头-->
|
|
|
|
|
|
<a href="javascript:;" class="arrow-right">></a> <!--右边的箭头-->
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
<!--今日推荐end-->
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
index.css中的代码如下；
|
|
|
|
|
|
|
|
|
|
|
|
```css
|
|
|
|
|
|
/*今日推荐start*/
|
|
|
|
|
|
.today {
|
|
|
|
|
|
padding: 10px 0 20px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.today-left a{
|
|
|
|
|
|
display: block;
|
|
|
|
|
|
width: 210px;
|
|
|
|
|
|
height: 150px;
|
|
|
|
|
|
background: url("../images/today.jpg");
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.today-right {
|
|
|
|
|
|
float: right;
|
|
|
|
|
|
width: 1000px;
|
|
|
|
|
|
overflow: hidden; /*隐藏掉右侧超出的几个像素*/
|
|
|
|
|
|
position: relative;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.today-right ul {
|
|
|
|
|
|
width: 410%; /*这一点很有技巧*/
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.today-right li{
|
|
|
|
|
|
float: left;
|
|
|
|
|
|
margin-right: 1px;
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
/*今日推荐end*/
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## banner两侧的广告
|
|
|
|
|
|
|
|
|
|
|
|
要实现的内容是下图中的箭头处：
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
注意这部分的div的位置，是放在`class="shortcut-nav"`和`class="main"`之间的。
|
|
|
|
|
|
|
|
|
|
|
|
两侧的广告其实是一个放在 a 标签里的超大背景图，而且这个大图的宽度超过了版心。所以，超链接的宽度给`width: 100%`更合适。a 的高度设置为图片的高度即可。
|
|
|
|
|
|
|
|
|
|
|
|
代码实现如下：
|
|
|
|
|
|
|
|
|
|
|
|
html:
|
|
|
|
|
|
|
|
|
|
|
|
```html
|
|
|
|
|
|
<!--网页两侧的广告start-->
|
|
|
|
|
|
<div class="banner-ad">
|
|
|
|
|
|
<a href="http://www.baidu.com"></a>
|
|
|
|
|
|
</div>
|
|
|
|
|
|
<!--网页两侧的广告end-->
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
index.css:
|
|
|
|
|
|
|
|
|
|
|
|
```css
|
|
|
|
|
|
/*banner两侧的广告start*/
|
|
|
|
|
|
.banner-ad {
|
|
|
|
|
|
position: relative;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.banner-ad a {
|
|
|
|
|
|
width: 100%;
|
|
|
|
|
|
height: 644px;
|
|
|
|
|
|
background: url("../images/ad.png") no-repeat center top;
|
|
|
|
|
|
position: absolute;
|
|
|
|
|
|
}
|
|
|
|
|
|
/*banner两侧的广告end*/
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
上方代码中，我们不用给图片的父亲`banner-ad`设置高度。
|
|
|
|
|
|
|
|
|
|
|
|
超链接a ：我们不知道超链接的宽度是多少，所以直接设置为`width: 100%`。注意它的背景图的摆放位置，`center`确保了背景图位于水平方向的正中间，`top`确保了背景图和父亲定边对齐。
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
注意，上图中，两侧的广告实现之后发现，蓝框部分的两个位置(`main-news-top-faster`和`today-left`)点击时，发现跳转的是两侧广告的链接，因为它们的层级不够高。解决办法：给蓝框这两个部分加一个`position: relative`属性即可提高层级。
|
|
|
|
|
|
|
|
|
|
|
|
## 总结
|
|
|
|
|
|
|
|
|
|
|
|
上一篇文章和这一篇文章，加起来，最终实现的效果如下：
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-03-14 22:04:26 +08:00
|
|
|
|
工程文件：[2018-01-23-前端基础练习-JD顶部导航.rar](https://github.com/qianguyihao/web-resource/blob/main/project/2018-01-23-%E5%89%8D%E7%AB%AF%E5%9F%BA%E7%A1%80%E7%BB%83%E4%B9%A0-JD%E9%A1%B6%E9%83%A8%E5%AF%BC%E8%88%AA.rar)
|
2018-01-24 16:35:19 +08:00
|
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|
