<meta content="target-densitydpi=320,width=640,user-scalable=no" name="viewport">
会自动根据dpi320和宽度640的比例，整体页面缩放改变效果
@media (device-height:480px) and (-webkit-min-device-pixel-ratio:2){/* 兼容iphone4/4s */
.class{}
}
@media (device-height:568px) and (-webkit-min-device-pixel-ratio:2){/* 兼容iphone5 */
.class{}
}
@media (device-height:667px) and (-webkit-min-device-pixel-ratio:2){/* 兼容iphone6 */
.class{}
}
@media (device-height:736px) and (-webkit-min-device-pixel-ratio:2){/* 兼容iphone6 Plus */
.class{}
}
div{max-width:640px;min-width:320px;margin:0 auto;width:100%;height:100%;}
本文转自Ansue 51CTO博客，原文链接：http://blog.51cto.com/ansue/1639855，如需转载请自行联系原作者
