css 兼容各种iPhone

@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(min-device-width:375px)and(max-device-width:667px)and(-webkit-min-device-pixel-ratio:2){/*iphone6*/}@media(min-device-width:414px)and(max-device-width:736px)and(-webkit-min-device-pixel-ratio:3){/*iphone6plus*/}