本章将讲解字体图标(Glyphicons)，并通过一些实例了解它的使用。Bootstrap 捆绑了 200 多种字体格式的字形。首先让我们先来理解一下什么是字体图标。
什么是字体图标？
字体图标是在 Web 项目中使用的图标字体。虽然，Glyphicons Halflings 需要商业许可，但是您可以通过基于项目的 Bootstrap 来免费使用这些图标。
为了表示对图标作者的感谢，希望您在使用时加上 GLYPHICONS 网站的链接。
获取字体图标
我们已经在 环境安装 章节下载了 Bootstrap 3.x 版本，并理解了它的目录结构。在 fonts 文件夹内可以找到字体图标，它包含了下列这些文件：
- glyphicons-halflings-regular.eot
- glyphicons-halflings-regular.svg
- glyphicons-halflings-regular.ttf
- glyphicons-halflings-regular.woff
相关的 CSS 规则写在 dist 文件夹内的 css 文件夹内的 bootstrap.css 和 bootstrap-min.css 文件上。
字体图标列表
CSS 规则解释
下面的 CSS 规则构成 glyphicon class。
@font-face { font-family: 'Glyphicons Halflings'; src: url('../fonts/glyphicons-halflings-regular.eot'); src: url('../fonts/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'), url('../fonts/glyphicons-halflings-regular.woff') format('woff'), url('../fonts/glyphicons-halflings-regular.ttf') format('truetype'), url('../fonts/glyphicons-halflings-regular.svg#glyphicons_halflingsregular') format('svg');} .glyphicon { position: relative; top: 1px; display: inline-block; font-family: 'Glyphicons Halflings'; -webkit-font-smoothing: antialiased; font-style: normal; font-weight: normal; line-height: 1; -moz-osx-font-smoothing: grayscale;}
所以 font-face 规则实际上是在找到 glyphicons 地方声明 font-family 和位置。
.glyphicon class 声明一个从顶部偏移 1px 的相对位置，呈现为 inline-block，声明字体，规定 font-style 和 font-weight 为 normal，设置行高为 1。除此之外，使用 -webkit-font-smoothing: antialiased 和 -moz-osx-font-smoothing: grayscale; 获得跨浏览器的一致性。
然后，这里的
.glyphicon:empty { width: 1em;}是空的 glyphicon。
这里有 200 个 class，每个 class 针对一个图标。这些 class 的常见格式如下：
.glyphicon-keyword:before { content: "hexvalue";}比如，使用的 user 图标，它的 class 如下：
.glyphicon-user:before { content: "\e008";}用法
如需使用图标，只需要简单地使用下面的代码即可。请在图标和文本之间保留适当的空间。
<span class="glyphicon glyphicon-search"></span>
下面的实例演示了如何使用字体图标：
实例
<p> <button type="button" class="btn btn-default"> <span class="glyphicon glyphicon-sort-by-attributes"></span> </button> <button type="button" class="btn btn-default"> <span class="glyphicon glyphicon-sort-by-attributes-alt"></span> </button> <button type="button" class="btn btn-default"> <span class="glyphicon glyphicon-sort-by-order"></span> </button> <button type="button" class="btn btn-default"> <span class="glyphicon glyphicon-sort-by-order-alt"></span> </button></p><button type="button" class="btn btn-default btn-lg"> <span class="glyphicon glyphicon-user"></span> User</button><button type="button" class="btn btn-default btn-sm"> <span class="glyphicon glyphicon-user"></span> User</button><button type="button" class="btn btn-default btn-xs"> <span class="glyphicon glyphicon-user"></span> User</button>
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结果如下所示：
带有字体图标的导航栏
实例
<div class="navbar navbar-fixed-top navbar-inverse" role="navigation"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">Project name</a> </div> <div class="collapse navbar-collapse"> <ul class="nav navbar-nav"> <li class="active"> <a href="#"> <span class="glyphicon glyphicon-home">Home</span></a> </li> <li> <a href="#shop"> <span class="glyphicon glyphicon-shopping-cart">Shop</span></a> </li> <li> <a href="#support"> <span class="glyphicon glyphicon-headphones">Support</span></a> </li> </ul> </div> <!-- /.nav-collapse --> </div> <!-- /.container --></div><!-- jQuery (Bootstrap 插件需要引入) --><script src="https://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script><!-- 包含了所有编译插件 --><script src="https://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
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定制字体图标
我们已经看到如何使用字体图标，接下来我们看看如何定制字体图标。
我们将以上面的实例开始，并通过改变字体尺寸、颜色和应用文本阴影来进行定制图标。
下面是开始的代码：
<button type="button" class="btn btn-primary btn-lg"> <span class="glyphicon glyphicon-user"></span> User</button>
效果如下所示：
定制字体尺寸
通过增加或减少图标的字体尺寸，您可以让图标看起来更大或更小。
<button type="button" class="btn btn-primary btn-lg" style="font-size: 60px"> <span class="glyphicon glyphicon-user"></span> User</button>
定制字体颜色
<button type="button" class="btn btn-primary btn-lg" style="color: rgb(212, 106, 64);"> <span class="glyphicon glyphicon-user"></span> User</button>
应用文本阴影
<button type="button" class="btn btn-primary btn-lg" style="text-shadow: black 5px 3px 3px;"> <span class="glyphicon glyphicon-user"></span> User</button>
在线定制字体图标
图标列表
| 图标 | 类名 | 实例 |
|---|---|---|
| glyphicon glyphicon-asterisk | 知识兔 | |
| glyphicon glyphicon-plus | 知识兔 | |
| glyphicon glyphicon-minus | 知识兔 | |
| glyphicon glyphicon-euro | 知识兔 | |
| glyphicon glyphicon-cloud | 知识兔 | |
| glyphicon glyphicon-envelope | 知识兔 | |
| glyphicon glyphicon-pencil | 知识兔 | |
| glyphicon glyphicon-glass | 知识兔 | |
| glyphicon glyphicon-music | 知识兔 | |
| glyphicon glyphicon-search | 知识兔 | |
| glyphicon glyphicon-heart | 知识兔 | |
| glyphicon glyphicon-star | 知识兔 | |
| glyphicon glyphicon-star-empty | 知识兔 | |
| glyphicon glyphicon-user | 知识兔 | |
| glyphicon glyphicon-film | 知识兔 | |
| glyphicon glyphicon-th-large | 知识兔 | |
| glyphicon glyphicon-th | 知识兔 | |
| glyphicon glyphicon-th-list | 知识兔 | |
| glyphicon glyphicon-ok | 知识兔 | |
| glyphicon glyphicon-remove | 知识兔 | |
| glyphicon glyphicon-zoom-in | 知识兔 | |
| glyphicon glyphicon-zoom-out | 知识兔 | |
| glyphicon glyphicon-off | 知识兔 | |
| glyphicon glyphicon-signal | 知识兔 | |
| glyphicon glyphicon-cog | 知识兔 | |
| glyphicon glyphicon-trash | 知识兔 | |
| glyphicon glyphicon-home | 知识兔 | |
| glyphicon glyphicon-file | 知识兔 | |
| glyphicon glyphicon-time | 知识兔 | |
| glyphicon glyphicon-road | 知识兔 | |
| glyphicon glyphicon-download-alt | 知识兔 | |
| glyphicon glyphicon-download | 知识兔 | |
| glyphicon glyphicon-upload | 知识兔 | |
| glyphicon glyphicon-inbox | 知识兔 | |
| glyphicon glyphicon-play-circle | 知识兔 | |
| glyphicon glyphicon-repeat | 知识兔 | |
| glyphicon glyphicon-refresh | 知识兔 | |
| glyphicon glyphicon-list-alt | 知识兔 | |
| glyphicon glyphicon-lock | 知识兔 | |
| glyphicon glyphicon-flag | 知识兔 | |
| glyphicon glyphicon-headphones | 知识兔 | |
| glyphicon glyphicon-volume-off | 知识兔 | |
| glyphicon glyphicon-volume-down | 知识兔 | |
| glyphicon glyphicon-volume-up | 知识兔 | |
| glyphicon glyphicon-qrcode | 知识兔 | |
| glyphicon glyphicon-barcode | 知识兔 | |
| glyphicon glyphicon-tag | 知识兔 | |
| glyphicon glyphicon-tags | 知识兔 | |
| glyphicon glyphicon-book | 知识兔 | |
| glyphicon glyphicon-bookmark | 知识兔 | |
| glyphicon glyphicon-print | 知识兔 | |
| glyphicon glyphicon-camera | 知识兔 | |
| glyphicon glyphicon-font | 知识兔 | |
| glyphicon glyphicon-bold | 知识兔 | |
| glyphicon glyphicon-italic | 知识兔 | |
| glyphicon glyphicon-text-height | 知识兔 | |
| glyphicon glyphicon-text-width | 知识兔 | |
| glyphicon glyphicon-align-left | 知识兔 | |
| glyphicon glyphicon-align-center | 知识兔 | |
| glyphicon glyphicon-align-right | 知识兔 | |
| glyphicon glyphicon-align-justify | 知识兔 | |
| glyphicon glyphicon-list | 知识兔 | |
| glyphicon glyphicon-indent-left | 知识兔 | |
| glyphicon glyphicon-indent-right | 知识兔 | |
| glyphicon glyphicon-facetime-video | 知识兔 | |
| glyphicon glyphicon-picture | 知识兔 | |
| glyphicon glyphicon-map-marker | 知识兔 | |
| glyphicon glyphicon-adjust | 知识兔 | |
| glyphicon glyphicon-tint | 知识兔 | |
| glyphicon glyphicon-edit | 知识兔 | |
| glyphicon glyphicon-share | 知识兔 | |
| glyphicon glyphicon-check | 知识兔 | |
| glyphicon glyphicon-move | 知识兔 | |
| glyphicon glyphicon-step-backward | 知识兔 | |
| glyphicon glyphicon-fast-backward | 知识兔 | |
| glyphicon glyphicon-backward | 知识兔 | |
| glyphicon glyphicon-play | 知识兔 | |
| glyphicon glyphicon-pause | 知识兔 | |
| glyphicon glyphicon-stop | 知识兔 | |
| glyphicon glyphicon-forward | 知识兔 | |
| glyphicon glyphicon-fast-forward | 知识兔 | |
| glyphicon glyphicon-step-forward | 知识兔 | |
| glyphicon glyphicon-eject | 知识兔 | |
| glyphicon glyphicon-chevron-left | 知识兔 | |
| glyphicon glyphicon-chevron-right | 知识兔 | |
| glyphicon glyphicon-plus-sign | 知识兔 | |
| glyphicon glyphicon-minus-sign | 知识兔 | |
| glyphicon glyphicon-remove-sign | 知识兔 | |
| glyphicon glyphicon-ok-sign | 知识兔 | |
| glyphicon glyphicon-question-sign | 知识兔 | |
| glyphicon glyphicon-info-sign | 知识兔 | |
| glyphicon glyphicon-screenshot | 知识兔 | |
| glyphicon glyphicon-remove-circle | 知识兔 | |
| glyphicon glyphicon-ok-circle | 知识兔 | |
| glyphicon glyphicon-ban-circle | 知识兔 | |
| glyphicon glyphicon-arrow-left | 知识兔 | |
| glyphicon glyphicon-arrow-right | 知识兔 | |
| glyphicon glyphicon-arrow-up | 知识兔 | |
| glyphicon glyphicon-arrow-down | 知识兔 | |
| glyphicon glyphicon-share-alt | 知识兔 | |
| glyphicon glyphicon-resize-full | 知识兔 | |
| glyphicon glyphicon-resize-small | 知识兔 | |
| glyphicon glyphicon-exclamation-sign | 知识兔 | |
| glyphicon glyphicon-gift | 知识兔 | |
| glyphicon glyphicon-leaf | 知识兔 | |
| glyphicon glyphicon-fire | 知识兔 | |
| glyphicon glyphicon-eye-open | 知识兔 | |
| glyphicon glyphicon-eye-close | 知识兔 | |
| glyphicon glyphicon-warning-sign | 知识兔 | |
| glyphicon glyphicon-plane | 知识兔 | |
| glyphicon glyphicon-calendar | 知识兔 | |
| glyphicon glyphicon-random | 知识兔 | |
| glyphicon glyphicon-comment | 知识兔 | |
| glyphicon glyphicon-magnet | 知识兔 | |
| glyphicon glyphicon-chevron-up | 知识兔 | |
| glyphicon glyphicon-chevron-down | 知识兔 | |
| glyphicon glyphicon-retweet | 知识兔 | |
| glyphicon glyphicon-shopping-cart | 知识兔 | |
| glyphicon glyphicon-folder-close | 知识兔 | |
| glyphicon glyphicon-folder-open | 知识兔 | |
| glyphicon glyphicon-resize-vertical | 知识兔 | |
| glyphicon glyphicon-resize-horizontal | 知识兔 | |
| glyphicon glyphicon-hdd | 知识兔 | |
| glyphicon glyphicon-bullhorn | 知识兔 | |
| glyphicon glyphicon-bell | 知识兔 | |
| glyphicon glyphicon-certificate | 知识兔 | |
| glyphicon glyphicon-thumbs-up | 知识兔 | |
| glyphicon glyphicon-thumbs-down | 知识兔 | |
| glyphicon glyphicon-hand-right | 知识兔 | |
| glyphicon glyphicon-hand-left | 知识兔 | |
| glyphicon glyphicon-hand-up | 知识兔 | |
| glyphicon glyphicon-hand-down | 知识兔 | |
| glyphicon glyphicon-circle-arrow-right | 知识兔 | |
| glyphicon glyphicon-circle-arrow-left | 知识兔 | |
| glyphicon glyphicon-circle-arrow-up | 知识兔 | |
| glyphicon glyphicon-circle-arrow-down | 知识兔 | |
| glyphicon glyphicon-globe | 知识兔 | |
| glyphicon glyphicon-wrench | 知识兔 | |
| glyphicon glyphicon-tasks | 知识兔 | |
| glyphicon glyphicon-filter | 知识兔 | |
| glyphicon glyphicon-briefcase | 知识兔 | |
| glyphicon glyphicon-fullscreen | 知识兔 | |
| glyphicon glyphicon-dashboard | 知识兔 | |
| glyphicon glyphicon-paperclip | 知识兔 | |
| glyphicon glyphicon-heart-empty | 知识兔 | |
| glyphicon glyphicon-link | 知识兔 | |
| glyphicon glyphicon-phone | 知识兔 | |
| glyphicon glyphicon-pushpin | 知识兔 | |
| glyphicon glyphicon-usd | 知识兔 | |
| glyphicon glyphicon-gbp | 知识兔 | |
| glyphicon glyphicon-sort | 知识兔 | |
| glyphicon glyphicon-sort-by-alphabet | 知识兔 | |
| glyphicon glyphicon-sort-by-alphabet-alt | 知识兔 | |
| glyphicon glyphicon-sort-by-order | 知识兔 | |
| glyphicon glyphicon-sort-by-order-alt | 知识兔 | |
| glyphicon glyphicon-sort-by-attributes | 知识兔 | |
| glyphicon glyphicon-sort-by-attributes-alt | 知识兔 | |
| glyphicon glyphicon-unchecked | 知识兔 | |
| glyphicon glyphicon-expand | 知识兔 | |
| glyphicon glyphicon-collapse-down | 知识兔 | |
| glyphicon glyphicon-collapse-up | 知识兔 | |
| glyphicon glyphicon-log-in | 知识兔 | |
| glyphicon glyphicon-flash | 知识兔 | |
| glyphicon glyphicon-log-out | 知识兔 | |
| glyphicon glyphicon-new-window | 知识兔 | |
| glyphicon glyphicon-record | 知识兔 | |
| glyphicon glyphicon-save | 知识兔 | |
| glyphicon glyphicon-open | 知识兔 | |
| glyphicon glyphicon-saved | 知识兔 | |
| glyphicon glyphicon-import | 知识兔 | |
| glyphicon glyphicon-export | 知识兔 | |
| glyphicon glyphicon-send | 知识兔 | |
| glyphicon glyphicon-floppy-disk | 知识兔 | |
| glyphicon glyphicon-floppy-saved | 知识兔 | |
| glyphicon glyphicon-floppy-remove | 知识兔 | |
| glyphicon glyphicon-floppy-save | 知识兔 | |
| glyphicon glyphicon-floppy-open | 知识兔 | |
| glyphicon glyphicon-credit-card | 知识兔 | |
| glyphicon glyphicon-transfer | 知识兔 | |
| glyphicon glyphicon-cutlery | 知识兔 | |
| glyphicon glyphicon-header | 知识兔 | |
| glyphicon glyphicon-compressed | 知识兔 | |
| glyphicon glyphicon-earphone | 知识兔 | |
| glyphicon glyphicon-phone-alt | 知识兔 | |
| glyphicon glyphicon-tower | 知识兔 | |
| glyphicon glyphicon-stats | 知识兔 | |
| glyphicon glyphicon-sd-video | 知识兔 | |
| glyphicon glyphicon-hd-video | 知识兔 | |
| glyphicon glyphicon-subtitles | 知识兔 | |
| glyphicon glyphicon-sound-stereo | 知识兔 | |
| glyphicon glyphicon-sound-dolby | 知识兔 | |
| glyphicon glyphicon-sound-5-1 | 知识兔 | |
| glyphicon glyphicon-sound-6-1 | 知识兔 | |
| glyphicon glyphicon-sound-7-1 | 知识兔 | |
| glyphicon glyphicon-copyright-mark | 知识兔 | |
| glyphicon glyphicon-registration-mark | 知识兔 | |
| glyphicon glyphicon-cloud-download | 知识兔 | |
| glyphicon glyphicon-cloud-upload | 知识兔 | |
| glyphicon glyphicon-tree-conifer | 知识兔 | |
| glyphicon glyphicon-tree-deciduous | 知识兔 |