面包屑是用来做当前页面所在的站点位置的导航作用,它一层层的表示站点分类或目录层级关系,而多步骤指示经常用在一些分步流程向导的应用,如分步注册向导,货物订购流程。今天我们来用CSS制作面包屑和多步骤指示的应用。
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HTML结构非常简单,一个有序列表ol,外面又
面包屑导航条的结构,我们给ol加上class样式为:.cd-breadcrumb,那么当前位置的层级li加上class样式为:.current。
<nav> <ol class="cd-breadcrumb"> <li><a href="#0">首页</a></li> <li><a href="#0">开发</a></li> <li><a href="#0">Web</a></li> <li class="current"><em>技术热点</em></li> </ol></nav>
多步骤指示的结构,我们给ol加上class样式为:.cd-multi-steps,已完成的步骤的li加上class样式:.visited,当前步骤li加上class样式:.current。
<nav> <ol class="cd-multi-steps text-center"> <li class="visited"><a href="#0">购物车</a></li> <li class="visited" ><a href="#0">结算付款</a></li> <li class="current"><em>送货</em></li> <li><em>验货收货</em></li> </ol></nav>
首先,我们使用::after伪元素来创建分隔符元素,就是层级之间的分割。
.cd-breadcrumb li::after, .cd-multi-steps li::after { display: inline-block; content: '\00bb'; margin: 0 .6em; color: #959fa5;}
如果我们需要使用自定义的分隔符,可以自定义样式 .custom-separator,并将样式添加到
<nav> <ol class="cd-breadcrumb custom-separator"> <li><a href="#0">首页</a></li> <li><a href="#0">开发</a></li> <li><a href="#0">Web</a></li> <li class="current"><em>技术热点</em></li> </ol></nav>
完了分隔符的样式.custom-separator这样写:
.cd-breadcrumb.custom-separator li::after, .cd-multi-steps.custom-separator li::after { /* replace the default separator with a custom icon */ content: ''; height: 16px; width: 16px; background: url(../img/cd-custom-separator.svg) no-repeat center center; vertical-align: middle;}
如果你像给面包屑导航和分步骤指示加上小图标,可以这些写样式,本例中我们使用svg文件来作图标处理。
.cd-breadcrumb.custom-icons li > *::before, .cd-multi-steps.custom-icons li > *::before { /* add a custom icon before each item */ content: ''; display: inline-block; height: 20px; width: 20px; margin-right: .4em; margin-top: -2px; background: url(../img/cd-custom-icons-01.svg) no-repeat 0 0; vertical-align: middle;}.cd-breadcrumb.custom-icons li:not(.current):nth-of-type(2) > *::before, .cd-multi-steps.custom-icons li:not(.current):nth-of-type(2) > *::before { /* change custom icon using image sprites */ background-position: -20px 0;}.cd-breadcrumb.custom-icons li:not(.current):nth-of-type(3) > *::before, .cd-multi-steps.custom-icons li:not(.current):nth-of-type(3) > *::before { background-position: -40px 0;}.cd-breadcrumb.custom-icons li:not(.current):nth-of-type(4) > *::before, .cd-multi-steps.custom-icons li:not(.current):nth-of-type(4) > *::before { background-position: -60px 0;}.cd-breadcrumb.custom-icons li.current:first-of-type > *::before, .cd-multi-steps.custom-icons li.current:first-of-type > *::before { /* change custom icon for the current item */ background-position: 0 -20px;}.cd-breadcrumb.custom-icons li.current:nth-of-type(2) > *::before, .cd-multi-steps.custom-icons li.current:nth-of-type(2) > *::before { background-position: -20px -20px;}.cd-breadcrumb.custom-icons li.current:nth-of-type(3) > *::before, .cd-multi-steps.custom-icons li.current:nth-of-type(3) > *::before { background-position: -40px -20px;}.cd-breadcrumb.custom-icons li.current:nth-of-type(4) > *::before, .cd-multi-steps.custom-icons li.current:nth-of-type(4) > *::before { background-position: -60px -20px;}
当然,我们也可以将三角形箭头设置成分隔符,代码如下:
.cd-breadcrumb.triangle li::after, .cd-breadcrumb.triangle li > *::after { /* li > *::after is the colored triangle after each item li::after is the white separator between two items */ content: ''; position: absolute; top: 0; left: 100%; content: ''; height: 0; width: 0; /* 48px is the height of the <a> element */ border: 24px solid transparent; border-right-width: 0; border-left-width: 20px; } .cd-breadcrumb.triangle li::after { /* this is the white separator between two items */ z-index: 1; -webkit-transform: translateX(4px); -moz-transform: translateX(4px); -ms-transform: translateX(4px); -o-transform: translateX(4px); transform: translateX(4px); border-left-color: #ffffff; /* reset style */ margin: 0; } .cd-breadcrumb.triangle li > *::after { /* this is the colored triangle after each element */ z-index: 2; border-left-color: inherit; } .cd-breadcrumb.triangle li:last-of-type::after, .cd-breadcrumb.triangle li:last-of-type > *::after { /* hide the triangle after the last step */ display: none; }
对于分步骤指示我们还可以添加class如:.text-center, .text-top和 .text-bottom来让文字的位置对齐,还可以添加class如count用来标记步骤数,如以下代码:
<nav> <ol class="cd-multi-steps text-bottom count"> <li class="visited"><a href="#0">购物车</a></li> <li class="visited" ><a href="#0">结算付款</a></li> <li class="current"><em>送货</em></li> <li><em>验货收货</em></li> </ol></nav>
各种添加的样式具体可以看演示demo,我们的demo中给出9种不同的示例,查看页面源代码你就会有收获。