CSS3面包屑导航和多步骤指示

BrandonDrur 8年前

来自: http://www.helloweba.com/view-blog-347.html

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。

查看演示 下载源码

HTML

HTML结构非常简单,一个有序列表ol,外面又<nav>包裹。

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>

CSS

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<ol>元素上,例如:

<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。

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