媒体查询判断ipad和iPhone各版本

/* 判断ipad */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px){
/* style */
}

/* ipad横屏 */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape){
/* style */
}

/* ipad竖屏 */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : portrait){
/* style */
}

/* 判断iphone5 *//* 横屏竖屏判断方法与ipad一样 */
@media only screen
and (min-device-width : 320px)
and (max-device-width : 568px){
/* style */
}

/* 判断iphone4-iphone4s *//* 横屏竖屏判断方法与ipad一样 */
@media only screen
and (min-device-width : 320px)
and (max-device-width : 480px){
/* style */
}

/* iphone5分辨率 */
screen Width = 320px (css像素)
screen Height = 568px (css像素)
screen Width = 640px (实际像素)
screen Height = 1136px (实际像素)
Device-pixel-ratio:2

/* iphone4-iphone4s分辨率 */
screen Width = 320px (css像素)
screen Height = 480px (css像素)
screen Width = 640px (实际像素)
screen Height = 960px (实际像素)
Device-pixel-ratio:2