legend分组显示 给每一个图例设置不一样的位置和样式
样式如下

demo代码
option = {
  title: {
    text: 'Stacked Line'
  },
  tooltip: {
    trigger: 'axis'
  },
  // legend写为数组可以给一些给某些组分配一些不一样的样式
  legend: [
    {
      data: [
        // 使用svg画任意的图形
        {name:'Email',icon: 'path://"M 100 100 L 150 100 L 125 150 L 100 150 L 75 100 Z"'},
        {name: 'Union Ads',icon: 'arrow'}
      ],
      left:150,
      itemWidth: 20,
      itemHeight: 20,
    },
    // 每一个对象是一组样式
    {
      data:['Video Ads', 'Direct', 'Search Engine'],
      right:100,
      itemWidth: 20,
      itemHeight: 20,
      icon: 'rect'
    }
    ],
  grid: {
    left: '3%',
    right: '4%',
    bottom: '3%',
    containLabel: true
  },
  toolbox: {
    feature: {
      saveAsImage: {}
    }
  },
  xAxis: {
    type: 'category',
    boundaryGap: false,
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  series: [
    {
      name: 'Email',
      type: 'line',
      stack: 'Total',
      data: [120, 132, 101, 134, 90, 230, 210]
    },
    {
      name: 'Union Ads',
      type: 'line',
      stack: 'Total',
      data: [220, 182, 191, 234, 290, 330, 310]
    },
    {
      name: 'Video Ads',
      type: 'line',
      stack: 'Total',
      data: [150, 232, 201, 154, 190, 330, 410]
    },
    {
      name: 'Direct',
      type: 'line',
      stack: 'Total',
      data: [320, 332, 301, 334, 390, 330, 320]
    },
    {
      name: 'Search Engine',
      type: 'line',
      stack: 'Total',
      data: [820, 932, 901, 934, 1290, 1330, 1320]
    }
  ]
};



















