随着智能手机、平板电脑越来越流行,许多网站都开始考虑为这些移动设备开发一套专属布局和样式。幸好 CSS3 提供了针对不同设备的查询规则,让这一目的变得非常容易实现。
<style type="text/css"> /* 说明:CSS3 为不同媒介设置样式的方式(CSS3 Media Queries) 来源:http://www.stuffandnonsense.co.uk/blog/about/hardboiled_css3_media_queries/ 整理:CodeBit.cn [ http://www.codebit.cn ] */ /* 智能手机 (纵向 和 横向) ----------- */ @media only screen and (min-device-width : 320px) and (max-device-width : 480px) { /* Styles */ } /* 智能手机 (横向) ----------- */ @media only screen and (min-width : 321px) { /* Styles */ } /* 智能手机 (纵向) ----------- */ @media only screen and (max-width : 320px) { /* Styles */ } /* iPad 系列 (纵向 和 横向) ----------- */ @media only screen and (min-device-width : 768px) and (max-device-width : 1024px) { /* Styles */ } /* iPad 系列 (横向) ----------- */ @media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) { /* Styles */ } /* iPad 系列 (纵向) ----------- */ @media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) { /* Styles */ } /* 台式机 和 笔记本 ----------- */ @media only screen and (min-width : 1224px) { /* Styles */ } /* 大屏幕 ----------- */ @media only screen and (min-width : 1824px) { /* Styles */ } /* iPhone 4 ----------- */ @media only screen and (-webkit-min-device-pixel-ratio : 1.5), only screen and (min-device-pixel-ratio : 1.5) { /* Styles */ } </style>
当然,将所有样式放在一起不是一个好主意,你可以将不同设备特定的 CSS 放到不同文件中,然后再通过 link 节点的 media 属性来加载:
<head> <link rel="stylesheet" href="smartphone.css" media="only screen and (min-device-width : 320px) and (max-device-width : 480px)"> <link rel="stylesheet" href="smartphone-landscape.css" media="only screen and (min-width : 321px)"> <link rel="stylesheet" href="smartphone-portrait.css" media="only screen and (max-width : 320px)"> <link rel="stylesheet" href="ipad.css" media="only screen and (min-device-width : 768px) and (max-device-width : 1024px)"> <link rel="stylesheet" href="ipad-landscape.css" media="only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape)"> <link rel="stylesheet" href="ipad-portrait.css" media="only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait)"> <link rel="stylesheet" href="widescreen.css" media="only screen and (min-width : 1824px)"> <link rel="stylesheet" href="iphone4.css" media="only screen and (-webkit-min-device-pixel-ratio : 1.5), only screen and (min-device-pixel-ratio : 1.5)"> </head>