http://www.w3cplus.com/css3/css3-media-queries-for-iPhone-and-iPads
那么以后大家在iPhone4和iPad设备上，就可以按照横竖板来定样式了：
1、iPhone4竖板
@media
only screen and (-webkit-min-device-pixel-ratio : 1.5) and (orientation:portrait),
only screen and (min-device-pixel-ratio : 1.5) and (orientation:portrait){
/*你的样式写在这里*/
}
2、iPhone横板
@media
only screen and (-webkit-min-device-pixel-ratio : 1.5) and (orientation:landscape),
only screen and (min-device-pixel-ratio : 1.5) and (orientation:landscape){
/*你的样式写在这里*/
}
3、iPad竖板
@media screen and (max-device-width: 768px) and (orientation: portrait) {
/*你的样式写在这里*/
}
4、iPad横板
@media screen and (max-device-width: 1024px) and (orientation: landscape) {
/*你样式写在这里*/
}
上面四种CSS3 Media Queries就是用来对付iPhone4和iPad的，至于其他的运用，大家参考下面我重新整理的CSS3 Media Queries模板：
CSS3 Media Queries 模板：
1、Smartphones (竖板和横板)
@media only screen and (min-device-width : 320px) and (max-device-width : 480px) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="smartphones.css" media="only screen and (min-device-width : 320px) and (max-device-width : 480px)" />
2、Smartphones (横板)
@media only screen and (min-width : 321px) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="smartphones-landscape.css" media="only screen and (min-width : 321px)" />
3、Smartphones (竖板)
@media only screen and (max-width : 320px) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="smartphones-portrait.css" media="only screen and (max-width : 320px)" />
4、iPad(竖板和横板)
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="ipad.css" media="only screen and (min-device-width : 768px) and (max-device-width : 1024px)" />
5、iPad横板
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="ipad-landscape.css" media="only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape)" />
6、iPad的竖板
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="ipad-portrait.css" media="only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait)" />
7、Desktops and laptops
@media only screen and (min-width : 1224px) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="desktops-and-laptops.css" media="only screen and (min-width : 1224px)" />
8、Large screens
@media only screen and (min-width : 1824px) {
/* 你的样式写在这里 */
}
//===或者====//
< link rel="stylesheet" href="large-screens.css" media="only screen and (min-width : 1824px)" />
9、iPone4
@media only screen and (-webkit-min-device-pixel-ratio : 1.5),only screen and (min-device-pixel-ratio : 1.5) {
/* 你的样式写在这里 */
}
//===或者====//
< 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)" />
10、iPhone4竖板
@media only screen and (-webkit-min-device-pixel-ratio : 1.5) and (orientation:portrait), only screen and (min-device-pixel-ratio : 1.5) and (orientation:portrait){
/*你的样式写在这里*/
}
//===或者====//
< link rel="stylesheet" href="iphone4-portrait.css" media="only screen and (-webkit-min-device-pixel-ratio : 1.5) and (orientation:portrait), only screen and (min-device-pixel-ratio : 1.5) and (orientation:portrait)" />
11、iPhone4横板
@media only screen and (-webkit-min-device-pixel-ratio : 1.5) and (orientation:landscape),only screen and (min-device-pixel-ratio : 1.5) and (orientation:landscape){
/*你的样式写在这里*/
}
//===或者====//
< link rel="stylesheet" href="iphone4-landscape.css" media="only screen and (-webkit-min-device-pixel-ratio : 1.5) and (orientation:landscape),only screen and (min-device-pixel-ratio : 1.5) and (orientation:landscape)" />
上面罗列了常用的CSS3 Media Queries模板，特别是在移动设备上的几种，希望对大家在今后的移动开发端上的运用有所帮助。当然CSS3 Media Queries的运用条件往往不只这些，大家完全可以根据自己的需求去定义不同的条件，但个人建议，使用CSS3 Media Queries采用主流就Ok了。随着潮流走嘛。那么今天就扯到这了。如果大家有更好的经验，可以通过下面的评论与我们一起分享。
2012年04月16日更新：iPad 3 Media Query
@media only screen and (min-device-width: 1536px) and (max-device-width: 2048px) and (-webkit-min-device-pixel-ratio: 2)
{
// your CSS
}
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