6月-echarts使用及踩坑指南

echarts legend头部有遮挡、上半部分显示不全，像被截取了一块

• 解决方案

legend-textStyle中加入lineHeight即可

• 效果
  

echarts多条折现配置双Y轴

• 解决方案

// yAxis配置两条数据
 yAxis: [
          {
            type: 'value',
            axisLabel: {
              formatter: '{value}'
            },
          },
          {
            type: 'value',
            axisLabel: {
              formatter: '{value}'
            },
          }
     ]
     //在想要设置为另一条Y轴数据中设置 yAxisIndex 这里注意：0为第一轴；1为第二轴
series: [
    {
      name: "1",
      data: [],
      type: "line",
      lineStyle: {
        color: "#4F9AFF",
      },
      yAxisIndex: 1,
    },
    {
      data: [],
      name: "2",
      type: "bar",
      barWidth: "10px",
    },
    {
      data: [],
      name: "3",
      type: "bar",
      barWidth: "10px",
    },
  ],

柱状图/折线图实现自动滚动、鼠标悬停时停止滚动并获取数据、鼠标离开时继续滚动

   let currentIndex = 0; //高亮index
   const len = res.data.length;//数据长度
 // 鼠标悬浮，停止轮播
      this.overViewChart.on("mouseover", function (params) {
        that.clearTime(); //清除定时器
        that.overViewChart.dispatchAction({
          type: "downplay",
          seriesIndex: currentIndex,
        });
        that.overViewChart.dispatchAction({
          type: "highlight",
          seriesIndex: 0,
          dataIndex: params.dataIndex,
        });
        that.overViewChart.dispatchAction({
          type: "showTip",
          seriesIndex: 0,
          dataIndex: params.dataIndex,
        });
        currentIndex = params.dataIndex;
        that.initTwoBarChart(params.data.key);//获取数据后执行的操作
      });
      // 鼠标离开，继续轮播
      this.overViewChart.on("mouseout", function () {
        that.clearTime();
        that.timer = setInterval(() => {
          // 取消之前高亮的图形
          that.overViewChart.dispatchAction({
            type: "downplay",
            seriesIndex: len,
            dataIndex: currentIndex,
          });
          if (currentIndex >= len - 1) {
            currentIndex = 0;
          } else {
            currentIndex++;
          }
          // 执行高亮
          that.overViewChart.dispatchAction({
            type: "highlight",
            seriesIndex: 0,
            dataIndex: currentIndex,
          });
          // 执行
          that.overViewChart.dispatchAction({
            type: "showTip",
            seriesIndex: 0,
            dataIndex: currentIndex,
          });
          that.initTwoBarChart(resOnline.data[currentIndex].dateString);//轮播时执行的操作
        }, 3000);
         that.timerList.push(that.timer);//由于定时器会反复覆盖，会有清理不干净的情况，所以定时器加入数组、统一清除
      });

  //定时器清理
   clearTime() {
      if (this.timerList.length > 0) {
        this.timerList.forEach((item, index) => {
          clearInterval(item);
        });
        this.timerList = [];
      }
    },