css媒体查询aspect-ratio宽高比在less中的使用
css媒体查询有一个 宽高比很方便，aspect-ratio ，可以直接使用宽/高 来进行页面适配 使用样例如下：
// 宽高比在(（320/50）+(728/90))/2 两个尺寸中间值以内 适配 320*50 设计图样式
@media screen and (min-aspect-ratio: ~"249/50") and (max-aspect-ratio: ~"29/4"){
@base: 320;
@convert: 375/@base;
.container{
width: 100vw;
height:100%;
position:relative;
display:flex;
flex-flow:row nowrap;
align-items: center;
.info-icon-box{
.width(46*@convert);
.height(46*@convert);
.border-radius(10*@convert);
.border(1@convert,#e3e3e3);
overflow: hidden;
.margin-left(10*@convert);
.min-width(46*@convert);
.max-width(46*@convert);
flex-grow: 0;
img {
width: 100%;
height: 100%;
.border-radius(10);
vertical-align: top;
}
}
.info-other{
flex-grow: 1;
display:flex;
flex-flow:column nowrap;
overflow: hidden;
height:100%;
.margin-left(10*@convert);
.info-wrap.roll-box{
height:200%;
}
.info-box{
width:100%;
height:50%;
flex-grow: 1;
display:flex;
flex-flow:row nowrap;
align-items: center;
.info{
width:48vw;
height: 100%;
flex-grow: 1;
display: flex;
//align-items: center;
flex-direction:column;
justify-content: center;
.info-title{
font-weight:bold;
.font-size(16*@convert);
.line-height(26*@convert);
color: #484848 ;
.margin-bottom(4*@convert);
}
.info-other-rate {
display: flex;
align-items: center;
justify-content: flex-start;
position:relative;
z-index:2;
.star-number{
.font-size(15*@convert);
color:#4a4a4a;
.padding-right(5*@convert);
}
.star-evaluate {
position: relative;
.width(100*@convert);
.height(16*@convert);
background: url("../../assets/images/star_gray.png") no-repeat 0 0;
background-size: cover;
overflow: hidden;
.star {
position: absolute;
top: 0;
left: 0;
display: inline-block;
.height(16*@convert);
background: url("../../assets/images/star.png") no-repeat 0 0;
background-size: cover;
overflow: hidden;
}
.star-1 {
.width(8*@convert);
}
.star-2 {
.width(21*@convert);
}
.star-3 {
.width(29*@convert);
}
.star-4 {
.width(42*@convert);
}
.star-5 {
.width(50*@convert);
}
.star-6 {
.width(63*@convert);
}
.star-7 {
.width(71*@convert);
}
.star-8 {
.width(84*@convert);
}
.star-9 {
.width(92*@convert);
}
.star-10 {
.width(100*@convert);
}
}
}
.info-desc-box{
display: none;
}
}
.info-install{
.min-width(66*@convert);
width:fit-content;
.height(40*@convert);
.line-height(40*@convert);
box-sizing: border-box;
.padding-all(0,4*@convert,0,4*@convert);
.font-size(14*@convert);
color:#fff;
text-align: center;
.margin-right(20*@convert);
background:url("../../assets/images/btn_download_short_shadow.png") no-repeat 0 0;
background-size:100% 100%;
}
}
.info-desc-box {
width:100%;
height:50%;
.padding-all(4*@convert, 26*@convert, 4*@convert, 0);
box-sizing: border-box;
overflow: hidden;
.info-desc{
.font-size(14*@convert);
.line-height(20*@convert);
color: #484848 ;
.info-other-rate{
display: none;
}
}
}
}
}
}
// 宽高比大于(（320/50）+(728/90))/2 两个尺寸中间值 适配 728*90 设计图样式
@media screen and (min-aspect-ratio: ~"29/4"){
@base: 728;
@convert: 375/@base;
.container{
width: 100vw;
height:100%;
position:relative;
display:flex;
flex-flow:row nowrap;
align-items: center;
.info-icon-box{
.width(88*@convert);
.height(88*@convert);
.border-radius(10*@convert);
.border(1@convert,#e3e3e3);
overflow: hidden;
.margin-left(10*@convert);
.min-width(88*@convert);
.max-width(88*@convert);
flex-grow: 0;
img {
width: 100%;
height: 100%;
.border-radius(10);
vertical-align: top;
}
}
.info-other{
flex-grow: 1;
display:flex;
flex-flow:column nowrap;
overflow: hidden;
height:100%;
.margin-left(10*@convert);
.info-wrap{
height:100%;
.info-box{
width:100%;
height:100%;
flex-grow: 1;
display:flex;
flex-flow:row nowrap;
align-items: center;
.info{
width:48vw;
height: 100%;
flex-grow: 1;
display: flex;
flex-direction:column;
justify-content: center;
.margin-right(20*@convert);
.info-title-rate{
display: flex;
flex-flow: row nowrap;
}
.info-title{
font-weight:bold;
.font-size(24*@convert);
.line-height(37*@convert);
color: #484848 ;
.margin-bottom(4*@convert);
}
.info-other-rate {
display: flex;
align-items: center;
justify-content: flex-start;
position:relative;
z-index:2;
.star-number{
.font-size(15*@convert);
color:#4a4a4a;
.padding-right(5*@convert);
}
.star-evaluate {
position: relative;
.width(100*@convert);
.height(16*@convert);
background: url("../../assets/images/star_gray.png") no-repeat 0 0;
background-size: cover;
overflow: hidden;
.star {
position: absolute;
top: 0;
left: 0;
display: inline-block;
.height(16*@convert);
background: url("../../assets/images/star.png") no-repeat 0 0;
background-size: cover;
overflow: hidden;
}
.star-1 {
.width(8*@convert);
}
.star-2 {
.width(21*@convert);
}
.star-3 {
.width(29*@convert);
}
.star-4 {
.width(42*@convert);
}
.star-5 {
.width(50*@convert);
}
.star-6 {
.width(63*@convert);
}
.star-7 {
.width(71*@convert);
}
.star-8 {
.width(84*@convert);
}
.star-9 {
.width(92*@convert);
}
.star-10 {
.width(100*@convert);
}
}
}
.info-desc-box {
width:100%;
.height(20*@convert);
.padding-all(4*@convert, 26*@convert, 4*@convert, 0);
box-sizing: border-box;
overflow: hidden;
.info-desc{
.font-size(14*@convert);
.line-height(20*@convert);
color: #484848 ;
.info-other-rate{
display: none;
}
}
.roll-box{
height:auto;
}
}
}
.info-install{
.min-width(66*@convert);
width:fit-content;
.height(40*@convert);
.line-height(40*@convert);
box-sizing: border-box;
.padding-all(0,4*@convert,0,4*@convert);
.font-size(14*@convert);
color:#fff;
text-align: center;
.margin-right(20*@convert);
background:url("../../assets/images/btn_download_short_shadow.png") no-repeat 0 0;
background-size:100% 100%;
}
}
}
&.info-desc-box {
display: none;
}
}
}
}
注意三点：
1、宽高比一定是比值的形式，不能直接写小数，宽/高
2、在less中直接写宽高比也不会生效，因为less会编译成小数，可以在比值前面加一个 ~ 完美解决
3、避免样式覆盖，最好把大比例的媒体查询写在后面
参考链接：
https://developer.mozilla.org/zh-CN/docs/Web/Guide/CSS/Media_queries 媒体查询
http://www.zhangyunling.com/837.html device-aspect-ratio与aspect-ratio单屏布局
https://stackoverflow.com/questions/50465331/scss-media-query-aspect-ratio-not-working scss中不生效
