最近做项目遇到一个需求，需要显示广东省各个地级市的地图，并且鼠标移入高亮显示，鼠标点击可以选中某个地级市。在网上查阅了大量资料之后，最后选择了使用echarts实现该需求。在此记录一下，希望可以帮到有需求的小伙伴。本人初次使用，有不足之处希望大家可以指出，先看看效果图：
该需求主要有以下几个关键点：
首先我们需要初始化一个地图坐标系，可以在网上下载一个地图的json文件。
import GDJson from '../../../../statics/cdn/guangdong.json';
echarts.registerMap('GD', GDJson);然后就是通过配置option绘制出具体的地图，此处我是通过绘制一个散点图，实现的各个地级市名字的显示，需要知道各个市的经纬度，这个可以在网上查到。然后通过dataRange设置了不同的value值所显示的颜色。具体配置如下所示：
var provienceData = [
{ name: '广州', type: 'areaCenterCity', value: 0, departId: '001021' },
{ name: '深圳', type: 'areaCenterCity', value: 0, departId: '001020' },
{ name: '佛山', type: 'areaCenterCity', value: 0, departId: '001004' },
{ name: '东莞', type: 'areaCenterCity', value: 0, departId: '001008' },
{ name: '中山', type: 'areaCenterCity', value: 0, departId: '001019' },
{ name: '珠海', type: 'areaCenterCity', value: 0, departId: '001011' },
{ name: '江门', type: 'areaCenterCity', value: 0, departId: '001015' },
{ name: '肇庆', type: 'areaCenterCity', value: 0, departId: '001005' },
{ name: '惠州', type: 'areaCenterCity', value: 0, departId: '001010' },
{ name: '汕头', type: 'areaCenterCity', value: 0, departId: '001007' },
{ name: '潮州', type: 'areaCenterCity', value: 0, departId: '001009' },
{ name: '揭阳', type: 'areaCenterCity', value: 0, departId: '001006' },
{ name: '汕尾', type: 'areaCenterCity', value: 0, departId: '001001' },
{ name: '湛江', type: 'areaCenterCity', value: 0, departId: '001018' },
{ name: '茂名', type: 'areaCenterCity', value: 0, departId: '001003' },
{ name: '阳江', type: 'areaCenterCity', value: 0, departId: '001016' },
{ name: '韶关', type: 'areaCenterCity', value: 0, departId: '001013' },
{ name: '清远', type: 'areaCenterCity', value: 0, departId: '001017' },
{ name: '云浮', type: 'areaCenterCity', value: 0, departId: '001002' },
{ name: '梅州', type: 'areaCenterCity', value: 0, departId: '001014' },
{ name: '河源', type: 'areaCenterCity', value: 0, departId: '001012' },
];
let option = {
dataRange: {
show: false,
x: 'left',
y: 'bottom',
splitList: [
{ start: 0, end: 0, color: '#13667e' },//当值为5时，区域背景
{ start: 5, end: 5, color: '#187fed' },//当值为5时，区域背景
],
},
geo: {
map: 'GD',
roam: false,
zoom: 0.94,
tooltip: {
show: false, //不显示提示标签
},
center: [113.122717, 22.900762],
label: {
normal: {
show: false,//显示省份标签
textStyle: { color: "#333333" }//省份标签字体颜色
},
emphasis: {//对应的鼠标悬浮效果
show: false,
textStyle: { color: "#333333" }
}
},
itemStyle: {
normal: {
borderWidth: 1,//区域边框宽度
borderColor: '#ffffff',//区域边框颜色
areaColor: "#fff",//区域颜色
label: { show: false }
},
emphasis: {
areaColor: "#187fed",
}
},
},
series: [
{
type: 'scatter', //'line'（折线图） | 'bar'（柱状图） | 'scatter'（散点图） | 'k'（K线图）
//'pie'（饼图） | 'radar'（雷达图） | 'chord'（和弦图） | 'force'（力导向布局图） | 'map'（地图）
coordinateSystem: 'geo',
data: this.convertData(provienceData),
symbolSize: 10,
symbolRotate: 40,
geoIndex: 0,
label: {
normal: {
formatter: '{b}',
position: 'bottom',
show: true,
color: '#fff',
},
emphasis: {
show: false
}
},
tooltip: {
show: false, //不显示提示标签
formatter: '{c}', //提示标签格式
backgroundColor: "#fff",//提示标签背景颜色
borderColor: '#ccc',
borderWidth: 5,
textStyle: { color: "#ccc" } //提示标签字体颜色
},
itemStyle: {
normal: {
color: '#fff'
}
}
},
{
type: 'map',
mapType: 'GD',
geoIndex: 0,
roam: false,
zoom: 0.94,
center: [113.122717, 22.900762],
tooltip: {
show: false, //不显示提示标签
},
label: {
normal: {
show: false //显示省份标签
},
emphasis: {
show: false,
}
},
itemStyle: {
//正常样式
normal: {
borderWidth: 1, //区域边框宽度
borderColor: '#ffffff', //区域边框颜色
areaColor: "#187fed",
},
//鼠标事件区块样式
emphasis: {
areaColor: "#187fed",
}
},
data: provienceData
}
],
}
myChart.setOption(option);
convertData(data) {
const geoCoordMap = {
'广州': [113.480637, 23.325178],
'深圳': [114.085947, 22.597],
'佛山': [113.022717, 23.028762],
'东莞': [113.746262, 23.006237],
'中山': [113.382391, 22.521113],
'珠海': [113.353986, 22.124979],
'江门': [112.594942, 22.290431],
'肇庆': [112.072529, 23.651546],
'惠州': [114.412599, 23.079404],
'汕头': [116.708463, 23.37102],
'潮州': [116.832301, 23.761701],
'揭阳': [116.055733, 23.343778],
'汕尾': [115.364238, 22.974485],
'湛江': [110.064977, 21.274898],
'茂名': [110.919229, 21.959751],
'阳江': [111.805107, 22.009222],
'韶关': [113.591544, 24.801322],
'清远': [113.051227, 24.285022],
'云浮': [112.044439, 22.929801],
'梅州': [116.117582, 24.299112],
'河源': [114.997802, 23.946266],
}
var res = [];
for (var i = 0; i < data.length; i++) {
var geoCoord = geoCoordMap[data[i].name];
if (geoCoord) {
res.push({
name: data[i].name,
value: geoCoord.concat(data[i].value),
area: data[i].area,
type: data[i].type,
});
}
}
return res;
}最后则是为地图添加点击事件，点击某个区域的时候，更改某个区域的value值，进而改变其颜色
myChart.on('click', function (params) {
for (let i = 0; i < provienceData.length; i++) {
provienceData[i].value = 0
if (params.name === provienceData[i].name && _this.state.departName !== params.data.name) {
provienceData[i].value = 5
}
}
myChart.setOption(option);
});最后来一波总体代码
import React from 'react'
import echarts from 'echarts';
import GDJson from '../../../../statics/cdn/guangdong.json';
componentDidMount() {
this.initalECharts()
}
// 初始化地图
initalECharts() {
if(!document.getElementById('map')){
return
}
let _this = this
var provienceData = [
{ name: '广州', type: 'areaCenterCity', value: 0, departId: '001021' },
{ name: '深圳', type: 'areaCenterCity', value: 0, departId: '001020' },
{ name: '佛山', type: 'areaCenterCity', value: 0, departId: '001004' },
{ name: '东莞', type: 'areaCenterCity', value: 0, departId: '001008' },
{ name: '中山', type: 'areaCenterCity', value: 0, departId: '001019' },
{ name: '珠海', type: 'areaCenterCity', value: 0, departId: '001011' },
{ name: '江门', type: 'areaCenterCity', value: 0, departId: '001015' },
{ name: '肇庆', type: 'areaCenterCity', value: 0, departId: '001005' },
{ name: '惠州', type: 'areaCenterCity', value: 0, departId: '001010' },
{ name: '汕头', type: 'areaCenterCity', value: 0, departId: '001007' },
{ name: '潮州', type: 'areaCenterCity', value: 0, departId: '001009' },
{ name: '揭阳', type: 'areaCenterCity', value: 0, departId: '001006' },
{ name: '汕尾', type: 'areaCenterCity', value: 0, departId: '001001' },
{ name: '湛江', type: 'areaCenterCity', value: 0, departId: '001018' },
{ name: '茂名', type: 'areaCenterCity', value: 0, departId: '001003' },
{ name: '阳江', type: 'areaCenterCity', value: 0, departId: '001016' },
{ name: '韶关', type: 'areaCenterCity', value: 0, departId: '001013' },
{ name: '清远', type: 'areaCenterCity', value: 0, departId: '001017' },
{ name: '云浮', type: 'areaCenterCity', value: 0, departId: '001002' },
{ name: '梅州', type: 'areaCenterCity', value: 0, departId: '001014' },
{ name: '河源', type: 'areaCenterCity', value: 0, departId: '001012' },
];
echarts.registerMap('GD', GDJson);
//初始化ECharts实例
const myChart = echarts.init(document.getElementById('map'));
let option = {
dataRange: {
show: false,
x: 'left',
y: 'bottom',
splitList: [
{ start: 0, end: 0, color: '#13667e' },//当值为5时，区域背景
{ start: 5, end: 5, color: '#187fed' },//当值为5时，区域背景
],
},
geo: {
map: 'GD',
roam: false,
zoom: 0.94,
tooltip: {
show: false, //不显示提示标签
},
center: [113.122717, 22.900762],
label: {
normal: {
show: false,//显示省份标签
textStyle: { color: "#333333" }//省份标签字体颜色
},
emphasis: {//对应的鼠标悬浮效果
show: false,
textStyle: { color: "#333333" }
}
},
itemStyle: {
normal: {
borderWidth: 1,//区域边框宽度
borderColor: '#ffffff',//区域边框颜色
areaColor: "#fff",//区域颜色
label: { show: false }
},
emphasis: {
areaColor: "#187fed",
}
},
},
series: [
{
type: 'scatter', //'line'（折线图） | 'bar'（柱状图） | 'scatter'（散点图） | 'k'（K线图）
//'pie'（饼图） | 'radar'（雷达图） | 'chord'（和弦图） | 'force'（力导向布局图） | 'map'（地图）
coordinateSystem: 'geo',
data: this.convertData(provienceData),
symbolSize: 10,
symbolRotate: 40,
geoIndex: 0,
label: {
normal: {
formatter: '{b}',
position: 'bottom',
show: true,
color: '#fff',
},
emphasis: {
show: false
}
},
tooltip: {
show: false, //不显示提示标签
formatter: '{c}', //提示标签格式
backgroundColor: "#fff",//提示标签背景颜色
borderColor: '#ccc',
borderWidth: 5,
textStyle: { color: "#ccc" } //提示标签字体颜色
},
itemStyle: {
normal: {
color: '#fff'
}
}
},
{
type: 'map',
mapType: 'GD',
geoIndex: 0,
roam: false,
zoom: 0.94,
center: [113.122717, 22.900762],
tooltip: {
show: false, //不显示提示标签
},
label: {
normal: {
show: false //显示省份标签
},
emphasis: {
show: false,
}
},
itemStyle: {
//正常样式
normal: {
borderWidth: 1, //区域边框宽度
borderColor: '#ffffff', //区域边框颜色
areaColor: "#187fed",
},
//鼠标事件区块样式
emphasis: {
areaColor: "#187fed",
}
},
data: provienceData
}
],
}
myChart.setOption(option);
myChart.on('click', function (params) {
for (let i = 0; i < provienceData.length; i++) {
provienceData[i].value = 0
if (params.name === provienceData[i].name && _this.state.departName !== params.data.name) {
provienceData[i].value = 5
}
}
if (_this.state.departName !== params.data.name) {
_this.setState({ departName: params.data.name, departId: params.data.departId }, () => {
_this.getData()
})
} else {
_this.setState({ departName: '', departId: '' }, () => {
_this.getData()
})
}
myChart.setOption(option);
});
window.addEventListener('resize', () => {
if (myChart && myChart.resize) {
myChart.resize();
}
});
}
// 添加地图每个市的坐标
convertData(data) {
const geoCoordMap = {
'广州': [113.480637, 23.325178],
'深圳': [114.085947, 22.597],
'佛山': [113.022717, 23.028762],
'东莞': [113.746262, 23.006237],
'中山': [113.382391, 22.521113],
'珠海': [113.353986, 22.124979],
'江门': [112.594942, 22.290431],
'肇庆': [112.072529, 23.651546],
'惠州': [114.412599, 23.079404],
'汕头': [116.708463, 23.37102],
'潮州': [116.832301, 23.761701],
'揭阳': [116.055733, 23.343778],
'汕尾': [115.364238, 22.974485],
'湛江': [110.064977, 21.274898],
'茂名': [110.919229, 21.959751],
'阳江': [111.805107, 22.009222],
'韶关': [113.591544, 24.801322],
'清远': [113.051227, 24.285022],
'云浮': [112.044439, 22.929801],
'梅州': [116.117582, 24.299112],
'河源': [114.997802, 23.946266],
}
var res = [];
for (var i = 0; i < data.length; i++) {
var geoCoord = geoCoordMap[data[i].name];
if (geoCoord) {
res.push({
name: data[i].name,
value: geoCoord.concat(data[i].value),
area: data[i].area,
type: data[i].type,
});
}
}
return res;
}
render(){
return(<div className={styles.map} id="map"></div>)
}