https://juejin.cn/post/7163932925955112996#heading-20
假设设计稿尺寸为 1920*1080（做之前一定问清楚 ui 设计稿的尺寸）
即：
网页宽度=1920px
网页高度=1080px
我们都知道
网页宽度=100vw
网页宽度=100vh
所以，在 1920px*1080px 的屏幕分辨率下
1920px = 100vw
1080px = 100vh
这样一来，以一个宽 300px 和 200px 的 div 来说，其所占的宽高，以 vw 和 vh 为单位，计算方式如下:
vwDiv = (300px / 1920px ) * 100vw
vhDiv = (200px / 1080px ) * 100vh
所以，就在 1920*1080 的屏幕分辨率下，计算出了单个 div 的宽高
当屏幕放大或者缩小时，div 还是以 vw 和 vh 作为宽高的，就会自动适应不同分辨率的屏幕
// 使用 scss 的 math 函数，https://sass-lang.com/documentation/breaking-changes/slash-div
@use "sass:math";
// 默认设计稿的宽度
$designWidth: 1920;
// 默认设计稿的高度
$designHeight: 1080;
// px 转为 vw 的函数
@function vw($px) {
@return math.div($px, $designWidth) * 100vw;
}
// px 转为 vh 的函数
@function vh($px) {
@return math.div($px, $designHeight) * 100vh;
}
const path = require("path");
function resolve(dir) {
return path.join(__dirname, dir);
}
module.exports = {
publicPath: "",
configureWebpack: {
name: "app name",
resolve: {
alias: {
"@": resolve("src"),
},
},
},
css: {
// 全局配置 utils.scs，详细配置参考 vue-cli 官网
loaderOptions: {
sass: {
prependData: `@import "@/styles/utils.scss";`,
},
},
},
};
<template>
<div class="box">
</div>
</template>
<script>
export default{
name: "Box",
}
</script>
<style lang="scss" scoped="scoped">
/*
直接使用 vw 和 vh 函数，将像素值传进去，得到的就是具体的 vw vh 单位
*/
.box{
width: vw(300);
height: vh(100);
font-size: vh(16);
background-color: black;
margin-left: vw(10);
margin-top: vh(10);
border: vh(2) solid red;
}
</style>
@charset "utf-8";
// 默认设计稿的宽度
@designWidth: 1920;
// 默认设计稿的高度
@designHeight: 1080;
.px2vw(@name, @px) {
@{name}: (@px / @designWidth) * 100vw;
}
.px2vh(@name, @px) {
@{name}: (@px / @designHeight) * 100vh;
}
.px2font(@px) {
font-size: (@px / @designWidth) * 100vw;
}
const path = require("path");
function resolve(dir) {
return path.join(__dirname, dir);
}
module.exports = {
publicPath: "",
configureWebpack: {
name: "app name",
resolve: {
alias: {
"@": resolve("src"),
},
},
},
css: {
// 全局配置utils.scss
loaderOptions: {
less: {
additionalData: `@import "@/styles/utils.less";`,
},
},
},
};
<template>
<div class="box">
</div>
</template>
<script>
export default{
name: "Box",
}
</script>
<style lang="less" scoped="scoped">
/*
直接使用 vw 和 vh 函数，将像素值传进去，得到的就是具体的 vw vh单位
*/
.box{
.px2vw(width, 300);
.px2vh(height, 100);
.px2font(16);
.px2vw(margin-left, 300);
.px2vh(margin-top, 100);
background-color: black;
}
</style>
// 定义设计稿的宽高
const designWidth = 1920;
const designHeight = 1080;
// px转vw
export const px2vw = (_px) => {
return (_px * 100.0) / designWidth + 'vw';
};
export const px2vh = (_px) => {
return (_px * 100.0) / designHeight + 'vh';
};
export const px2font = (_px) => {
return (_px * 100.0) / designWidth + 'vw';
};
// directive.js
import * as ECharts from "echarts";
import elementResizeDetectorMaker from "element-resize-detector";
import Vue from "vue";
const HANDLER = "_vue_resize_handler";
function bind(el, binding) {
el[HANDLER] = binding.value
? binding.value
: () => {
let chart = ECharts.getInstanceByDom(el);
if (!chart) {
return;
}
chart.resize();
};
// 监听绑定的div大小变化，更新 echarts 大小
elementResizeDetectorMaker().listenTo(el, el[HANDLER]);
}
function unbind(el) {
// window.removeEventListener("resize", el[HANDLER]);
elementResizeDetectorMaker().removeListener(el, el[HANDLER]);
delete el[HANDLER];
}
// 自定义指令：v-chart-resize 示例：v-chart-resize="fn"
Vue.directive("chart-resize", { bind, unbind });
// Echarts图表字体、间距自适应
export const fitChartSize = (size,defalteWidth = 1920) => {
let clientWidth = window.innerWidth||document.documentElement.clientWidth||document.body.clientWidth;
if (!clientWidth) return size;
let scale = (clientWidth / defalteWidth);
return Number((size*scale).toFixed(3));
}
import {fitChartSize} from '@src/utils/dataUtil.js'
Vue.prototype.fitChartFont = fitChartSize;
<template>
<div class="chartsdom" ref="chart" v-chart-resize></div>
</template>
<script>
export default {
name: "dashboardChart",
data() {
return {
option: null,
};
},
mounted() {
this.getEchart();
},
methods: {
getEchart() {
let myChart = this.$echarts.init(this.$refs.chart);
const option = {
backgroundColor: "transparent",
tooltip: {
trigger: "item",
formatter: "{a} <br/>{b} : {c}%",
},
grid: {
left: this.fitChartSize(10),
right: this.fitChartSize(20),
top: this.fitChartSize(20),
bottom: this.fitChartSize(10),
containLabel: true,
},
calculable: true,
series: [
{
color: ["#0db1cdcc"],
name: "计划投入",
type: "funnel",
width: "45%",
height: "70%",
x: "5%",
minSize: "10%",
funnelAlign: "right",
center: ["50%", "50%"], // for pie
data: [
{
value: 30,
name: "下单30%",
},
{
value: 55,
name: "咨询55%",
},
{
value: 65,
name: "点击65%",
},
{
value: 60,
name: "访问62%",
},
{
value: 80,
name: "展现80%",
},
].sort(function (a, b) {
return a.value - b.value;
}),
roseType: true,
label: {
normal: {
formatter: function () {},
position: "inside",
},
},
itemStyle: {
normal: {
borderWidth: 0,
shadowBlur: this.fitChartSize(20),
shadowOffsetX: 0,
shadowOffsetY: this.fitChartSize(5),
shadowColor: "rgba(0, 0, 0, 0.3)",
},
},
},
{
color: ["#0C66FF"],
name: "实际投入",
type: "funnel",
width: "45%",
height: "70%",
x: "50%",
minSize: "10%",
funnelAlign: "left",
center: ["50%", "50%"], // for pie
data: [
{
value: 35,
name: "下单35%",
},
{
value: 40,
name: "咨询40%",
},
{
value: 70,
name: "访问70%",
},
{
value: 90,
name: "点击90%",
},
{
value: 95,
name: "展现95%",
},
].sort(function (a, b) {
return a.value - b.value;
}),
roseType: true,
label: {
normal: {
position: "inside",
},
},
itemStyle: {
normal: {
borderWidth: 0,
shadowBlur: this.fitChartSize(20),
shadowOffsetX: 0,
shadowOffsetY: this.fitChartSize(5),
shadowColor: "rgba(0, 0, 0, 0.3)",
},
},
},
],
};
myChart.setOption(option, true);
},
},
beforeDestroy() {},
};
</script>
<style lang="scss" scoped>
.chartsdom {
width: 100%;
height: 100%;
}
</style>
<script>
export default {
mounted() {
// 初始化自适应 ----在刚显示的时候就开始适配一次
handleScreenAuto();
// 绑定自适应函数 ---防止浏览器栏变化后不再适配
window.onresize = () => handleScreenAuto();
},
deleted() {
window.onresize = null;
},
methods: {
// 数据大屏自适应函数
handleScreenAuto() {
const designDraftWidth = 1920; //设计稿的宽度
const designDraftHeight = 960; //设计稿的高度
// 根据屏幕的变化适配的比例
const scale =
document.documentElement.clientWidth /
document.documentElement.clientHeight <
designDraftWidth / designDraftHeight
? document.documentElement.clientWidth / designDraftWidth
: document.documentElement.clientHeight / designDraftHeight;
// 缩放比例
document.querySelector(
'#screen',
).style.transform = `scale(${scale}) translate(-50%, -50%)`;
},
},
};
</script>
