iphone小屏幕（iphone4、5、6）兼容

方式一，直接写到样式里面

@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{}

}

方式二，链接到一个单独的样式表，把下面的代码放在标签里

<link rel="stylesheet" media="(device-height: 480px) and (-webkit-min-device-pixel-ratio:2)" href="iphone4.css" />

<link rel="stylesheet" media="(device-height: 568px)and (-webkit-min-device-pixel-ratio:2)" href="iphone5.css" />

<link rel="stylesheet" media="(device-height: 667px)and (-webkit-min-device-pixel-ratio:2)" href="iphone6.css" />

<link rel="stylesheet" media="(device-height: 736px)and (-webkit-min-device-pixel-ratio:2)" href="iphone6p.css" />

方式三通过高度来判断是否是iPhone 4还是iPhone 5或iPhone 6、iPhone6 Plus

isPhone4inches = (window.screen.height==480);

isPhone5inches = (window.screen.height==568);

isPhone6inches = (window.screen.height==667);

isPhone6pinches = (window.screen.height==736);