echarts 曲线重复颜色的解决办法

echarts 曲线重复颜色的解决办法

generateColor() {
      let color = "";
      let r = Math.floor(Math.random() * 256);
      let g = Math.floor(Math.random() * 256);
      let b = Math.floor(Math.random() * 256);
      color = `rgb(${r},${g},${b})`;
      return color; 
    }
this.lineObjData.forEach(element => {
          nameList.push(element.name);
          element.itemStyle = {
            color: this.generateColor()
          };
        });
this.lineCharts.setOption({
          tooltip: { trigger: "axis" },
          grid: { containLabel: true },
          toolbox: {
            feature: { saveAsImage: {} }
          },
          legend: {
            y: "bottom",
            x: "center",
            data: nameList
          },
          xAxis: {
            type: "category",
            boundaryGap: false,
            data: this.lineDate
          },
          yAxis: { type: "value" },
          series: this.lineObjData
        });