drawLine () {
      window.addEventListener('resize', this.drawLine)
      let myChart = this.$echarts.init(this.$refs.echarts)
      var option = {
        tooltip: {
          trigger: 'axis',
          axisPointer: { // 坐标轴指示器，坐标轴触发有效
            type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
          }
        },
        grid: {
          left: '2%',
          right: '4%',
          bottom: '14%',
          top: '16%',
          containLabel: true
        },
        xAxis: {
          type: 'category',
          data: ['1月', '2月', '3月', '4月', '5月', '6月', '7月', '8月', '9月', '10月', '11月', '12月'],
          axisLine: {
            lineStyle: {
              color: 'rgba(32, 72, 141, 1)'
            }
          },
          axisTick: { //y轴刻度线
            show: false
          },
          axisLabel: {
            // interval: 0,
            // rotate: 40,
            textStyle: {
              fontFamily: 'Microsoft YaHei',
              color: 'rgba(150, 175, 220, 1)',
              fontSize: 13
            }
          },
        },

        yAxis: {
          type: 'value',
          max: '1200',
          axisLine: {
            show: true,
            lineStyle: {
              color: 'rgba(32, 72, 141, 1)'
            }
          },
          axisTick: { //y轴刻度线
            show: false
          },
          splitLine: {
            show: true,
            lineStyle: {
              color: 'rgba(21, 58, 121, 0.66)',
              type: 'dashed'
            }
          },
          axisLabel: {
            // interval: 0,
            // rotate: 40,
            textStyle: {
              fontFamily: 'Microsoft YaHei',
              color: 'rgba(150, 175, 220, 1)',
              fontSize: 13
            }
          },
        },
        series: [{
          name: '考勤情况统计',
          type: 'bar',
          barWidth: '15%',
          itemStyle: {
            normal: {
              color: new this.$echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                offset: 0,
                color: 'rgba(0, 159, 251, 1)'
              }, {
                offset: 1,
                color: 'rgba(0, 159, 251, 0.2)'
              }]),
            },
          },
          data: [400, 400, 300, 300, 300, 400, 400, 400, 300, 300, 400, 400, 400, 300]
        },
        ]
      }
      myChart.clear()
      myChart.resize()
      myChart.setOption(option)
    },