H5 iPhoneX全面屏适配方案

一、media query方式

/*iPhone X 适配*/
@media only screen and (device-width: 375px) and (device-height: 812px) and (-webkit-device-pixel-ratio: 3) {
 .fixed-bottom{
 bottom: 37px;
 }
}
/*iPhone XS max 适配*/
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio:3) {
 .fixed-bottom{
 bottom: 37px;
 }
}
/*iPhone XR max 适配*/
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio:2) {
 .fixed-bottom{
 bottom: 37px;
 }
}

二、CSS函数

meta标签加入viewport-fit=cover

<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, viewport-fit=cover">

css写法，不支持env、constant的浏览器会忽略此样式

.fixed-bottom{
 bottom: 0;
 bottom: constant(safe-area-inset-bottom);
 bottom: env(safe-area-inset-bottom);
}

三、JS判断

if($(window).width() === 375 && $(window).height() === 724 && window.devicePixelRatio === 3){
    //
}

解决Iphonex 底部按钮fixed,bottom:0 底部留白问题因为本身页面内容的高度不够, 需通过代码撑开元素的高度.

1. 配合viewport-fit=“cover”使用

<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1,maximum-scale=1, user-scalable=0,viewport-fit=cover">

Demo

<div class="wrapper">
    <div class="main-wrapper">我是中间区域</div>
    <div class="btn-wrapper">我是fixed按钮</div>
</div>
// css 区域
.wrapper{
    position: relative;
    padding-bottom: 100px;
    box-sizing: border-box;
}
.main-wrapper{
    overflow: auto;
}
.btn-wrapper{
    width: 100%;
    height: 100px;
    position: fixed;
    left: 0;
    bottom: 0;
}
// iphonex 系列 需增加样式
//iphoneX、iphoneXs
@media only screen and (device-width: 375px) and (device-height: 812px) and (-webkit-device-pixel-ratio: 3) {
    .wrapper{
        height: 100vh;
        overflow: hidden;
    }
    .main-wrapper{
        height: 100%;
    }
}
//iphone Xs Max
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio:3) {
    .wrapper{
        height: 100vh;
        overflow: hidden;
    }
    .main-wrapper{
        height: 100%;
    }
}
//iphone XR
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio:2) {
    .wrapper{
        height: 100vh;
        overflow: hidden;
    }
    .main-wrapper{
        height: 100%;
    }
}