<chart
 :_id="'testCharts'"
 :_titleText="'访问量统计'"
 :_xText="'类别'"
 :_yText="'总访问量'"
 :_chartData="chartData"
 :_type="'Pie'"></chart>
 //测试数据样例 [["类别1",10],["类别2",20]]

<template>
 <div :id="_id" class="chart"></div>
</template>

function drawPie(chartData,id,titleText,xText,yText) {
 var chart = echarts.init(document.getElementById(id))
 var xAxisData = chartData.map(function (item) {return item[0]})
 var pieData = []
 chartData.forEach((v,i)=>{
  pieData.push({
  name:v[0],
  value:v[1]
  })
 })
 chart.setOption({
  title : {
  text: titleText,
  subtext: '',
  x:'center'
  },
  tooltip : {
  trigger: 'item',
  formatter: "{a} <br/>{b} : {c} ({d}%)"
  },
  legend: {
  orient: 'vertical',
  left: 'left',
  data: xAxisData
  },
  series : [
  {
   name: xText,
   type: 'pie',
   radius : '55%',
   center: ['50%', '60%'],
   data:pieData,
   itemStyle: {
   emphasis: {
    shadowBlur: 10,
    shadowOffsetX: 0,
    shadowColor: 'rgba(0, 0, 0, 0.5)'
   }
   }
  }
  ]
 })
 }

 watch:{
  _chartData(val){
  switch (this._type){
   case "LineAndBar":
   drawLineAndBar(val,this._id,this._titleText,this._xText,this._yText);
   break
   case "LineOrBar":
   drawLineOrBar(val,this._id,this._titleText,this._xText,this._yText);
   break
   case "Pie":
   drawPie(val,this._id,this._titleText,this._xText,this._yText);
   break
   default:
   drawLineAndBar(val,this._id,this._titleText,this._xText,this._yText);
   break
  }
  }
 },
 mounted() {
  switch (this._type){
  case "LineAndBar":
   drawLineAndBar(this._chartData,this._id,this._titleText,this._xText,this._yText);
   break
  case "LineOrBar":
   drawLineOrBar(this._chartData,this._id,this._titleText,this._xText,this._yText);
   break
  case "Pie":
   drawPie(this._chartData,this._id,this._titleText,this._xText,this._yText);
   break
  default:
   drawLineAndBar(this._chartData,this._id,this._titleText,this._xText,this._yText);
   break
  }
 }