echarts中饼图标签重叠的解决方案

饼图中的series有个avoidLabelOverlap属性，

avoidLabelOverlap:是否启用防止标签重叠策略，默认开启，在标签拥挤重叠的情况下会挪动各个标签的位置，防止标签间的重叠。

当avoidLabelOverlap设置为false时会出现以下情况

改为true之后就不会重叠 

代码如下

var option = {
        tooltip: {
          trigger: "item",
          formatter: "{a} <br/>{b} : {c} ({d}%)"
        },
        legend: {
          //orient: "vertical",
          x: "0%",
          //y: "25%",
          //y: "5%",
          itemWidth: 14,
          itemHeight: 14,
          align: "left",
          data: xData,
          textStyle: {
            color: "#fff"
          }
        },
        series: [
          {
            name: "危险源状态",
            type: "pie",
            radius: ["25%", "45%"],
            center: ["50%", "60%"],
            avoidLabelOverlap: true,//对，就是这里avoidLabelOverlap
            label: {
              normal: {
                show: true,
                position: "center"
              },
              emphasis: {
                show: true,
                textStyle: {
                  fontSize: "12",
                  fontWeight: "bold"
                }
              }
            },
            labelLine: {
              normal: {
                show: true
              }
            },
            data: pieData
          }
        ]
      };