ECharts2.27学习笔记：地图标线markLine炫光特效，模拟百
度迁徙
问题描述
在项⽬开发中我们遇到了⼀个关于ECharts的模拟迁徙的问题，迁出好说ECharts中的实例都体现出来了，关键是迁⼊这块，在这块遇到的问题如下：
1. markLine 箭头上⾯的数字 若是迁⼊的话，它会全部累计到迁⼊城市点。这种效果肯定是客户不需要的
2. markPoint上⾯的数字必须⿏标移上去后才能显⽰，** 如何做到让它直接展⽰呢？ **
当时想到的解决办法是将markLine上⾯label展⽰从箭头移动线条中间部分；奈何对ECharts不是很熟悉，看了半天的API页⾯到。
只能放弃，才把着重点放在了markPoint上⾯。
效果图
模拟迁⼊未解决问题时的效果图
模拟迁⼊解决问题后的效果图
解决⽅案及代码textstyle
在⽹上查看了下，发现有两种解决办法(个⼈觉得若是指写demo的话 第⼀种实⽤，若是需要跟后端数据库进⾏数据的⼀个交付，还是第⼆种实⽤)；两种⽅案都是实⽤两个markPoint 来实现让闪光点闪烁的同时，还有⽂字的tooltip。
参考帮助⽂档1 ：它采⽤现在地图上把闪光点渲染出来，然后再去填充需要显⽰的⽂字tooltip
参考帮助⽂档2 ：它采⽤填充两份同样的数据，然后设置他们的markPoint的标注图形炫光特效，具体的设置跟⽂档1的思路⼀样。代码
参考帮助⽂档1
<html lang="en">
<head>
<meta charset="utf-8">
<title>超绚丽的HTML5地图分布动画DEMO演⽰</title>
</head>
<body >
<!--Step:1 Prepare a dom for ECharts which (must) has size (width & hight)-->
<!--Step:1 为ECharts准备⼀个具备⼤⼩（宽⾼）的Dom-->
<div id="mainMap" >
</div>
<!--Step:2 Import echarts.js-->
<!--Step:2 引⼊echarts.js-->
<script type="text/javascript" src="js/jquery-1.8.0.js"></script>
<script src="js/echarts.js" charset="UTF-8"></script>
<script type="text/javascript">
$('#document').ready(function(){
getEcharts();
});
function getEcharts(){
/
/ Step:3 conifg ECharts's path, link to echarts.js from current page.
// Step:3 为模块加载器配置echarts的路径，从当前页⾯链接到echarts.js，定义所需图表路径    fig({
paths: {
echarts: './js'
}
});
// Step:4 require echarts and use it in the callback.
// Step:4 动态加载echarts然后在回调函数中开始使⽤，注意保持按需加载结构定义图表路径    require(
[
'echarts',
'echarts/chart/map'
],
function (ec) {
// --- 地图 ---
var myChart2 = ec.ElementById('mainMap'));
myChart2.setOption({
dataRange: {
min : 0,
max : 100,
calculable : true,
color: ['#ff3333', 'orange', 'yellow','lime','aqua'],
textStyle:{
color:'#fff'
}
},
series : [
{
name: '全国',
type: 'map',
roam: true,
hoverable: false,
mapType: 'china',
itemStyle:{
normal:{
borderColor:'rgba(100,149,237,1)',
borderWidth:0.5,
areaStyle:{
color: '#1b1b1b'
}
}
},
data:[],
markLine : {
smooth:true,
symbol: ['none', 'circle'],
symbolSize : 1,
itemStyle : {
normal: {
color:'#fff',
borderWidth:1,
borderColor:'rgba(30,144,255,0.5)'
}
},
data : [
]
,
},
geoCoord: {
'上海': [121.4648,31.2891],
'丹东': [124.541,40.4242],
'丽⽔': [119.5642,28.1854],
'乌鲁⽊齐': [87.9236,43.5883],      '佛⼭': [112.8955,23.1097],
'保定': [115.0488,39.0948],
'兰州': [103.5901,36.3043],
'包头': [110.3467,41.4899],
'北京': [116.4551,40.2539],
'北海': [109.314,21.6211],
'南京': [118.8062,31.9208],
'南宁': [108.479,23.1152],
'南昌': [116.0046,28.6633],
'南通': [121.1023,32.1625],
'厦门': [118.1689,24.6478],
'台州': [121.1353,28.6688],
'合肥': [117.29,32.0581],
'呼和浩特': [111.4124,40.4901],      '咸阳': [108.4131,34.8706],
'哈尔滨': [127.9688,45.368],
'唐⼭': [118.4766,39.6826],
'嘉兴': [120.9155,30.6354],
'⼤同': [113.7854,39.8035],
'⼤连': [122.2229,39.4409],
'天津': [117.4219,39.4189],
'太原': [112.3352,37.9413],
'威海': [121.9482,37.1393],
'宁波': [121.5967,29.6466],
'宝鸡': [107.1826,34.3433],
'宿迁': [118.5535,33.7775],
'常州': [119.4543,31.5582],
'⼴州': [113.5107,23.2196],
'廊坊': [116.521,39.0509],
'延安': [109.1052,36.4252],
'张家⼝': [115.1477,40.8527],      '徐州': [117.5208,34.3268],
'德州': [116.6858,37.2107],
'惠州': [114.6204,23.1647],
'成都': [103.9526,30.7617],
'扬州': [119.4653,32.8162],
'承德': [117.5757,41.4075],
'拉萨': [91.1865,30.1465],
'⽆锡': [120.3442,31.5527],
'⽇照': [119.2786,35.5023],
'昆明': [102.9199,25.4663],
'杭州': [119.5313,29.8773],
'枣庄': [117.323,34.8926],
'柳州': [109.3799,24.9774],
'株洲': [113.5327,27.0319],
'武汉': [114.3896,30.6628],
'汕头': [117.1692,23.3405],
'江门': [112.6318,22.1484],
'沈阳': [123.1238,42.1216],
'沧州': [116.8286,38.2104],
'河源': [114.917,23.9722],
'泉州': [118.3228,25.1147],
'泰安': [117.0264,36.0516],
'泰州': [120.0586,32.5525],
'济南': [117.1582,36.8701],
'济宁': [116.8286,35.3375],
'海⼝': [110.3893,19.8516],
'渭南': [109.7864,35.0299],
'湖州': [119.8608,30.7782],
'湘潭': [112.5439,27.7075],
'滨州': [117.8174,37.4963],
'潍坊': [119.0918,36.524],
'烟台': [120.7397,37.5128],
'⽟溪': [101.9312,23.8898],
'珠海': [113.7305,22.1155],
'盐城': [120.2234,33.5577],
'盘锦': [121.9482,41.0449],
'⽯家庄': [114.4995,38.1006],      '福州': [119.4543,25.9222],
'秦皇岛': [119.2126,40.0232],      '绍兴': [120.564,29.7565],
'聊城': [115.9167,36.4032],
'肇庆': [112.1265,23.5822],
'⾈⼭': [122.2559,30.2234],
'苏州': [120.6519,31.3989],
'莱芜': [117.6526,36.2714],
'菏泽': [115.6201,35.2057],
'营⼝': [122.4316,40.4297],
'葫芦岛': [120.1575,40.578],
'衡⽔': [115.8838,37.7161],
'衢州': [118.6853,28.8666],
'西宁': [101.4038,36.8207],
'西安': [109.1162,34.2004],
'贵阳': [106.6992,26.7682],
'连云港': [119.1248,34.552],
'邢台': [114.8071,37.2821],
'邯郸': [114.4775,36.535],
'郑州': [113.4668,34.6234],
'鄂尔多斯': [108.9734,39.2487],      '重庆': [107.7539,30.1904],
'⾦华': [120.0037,29.1028],
'铜川': [109.0393,35.1947],
'银川': [106.3586,38.1775],
'镇江': [119.4763,31.9702],
'长春': [125.8154,44.2584],
'长沙': [113.0823,28.2568],
'长治': [112.8625,36.4746],
'阳泉': [113.4778,38.0951],
'青岛': [120.4651,36.3373],
'韶关': [113.7964,24.7028]
},
markPoint : {
symbol:'emptyCircle',
symbolSize : function (v){
return 10 + v/10
},
effect : {
show: true,
shadowBlur : 0
},
itemStyle:{
normal:{
label:{show:false}
},
emphasis: {
label:{position:'top'}
}

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