drawLine () {
      var that = this
      window.addEventListener('resize', this.drawLine)
      var xdata = []
      this.xdata.forEach((type) => {
        xdata.push(moment(type).format('MM-DD HH'))
      })
      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: {
          top: '15%',
          left: '22%',
          right: '5%',
          bottom: '15%'
        },
        xAxis: [{
          type: 'category',
          boundaryGap: false,
          axisLine: {
            show: true,
            lineStyle: {
              color: '#263F74'
            },
          },
          axisLabel: {
            show: true,
            textStyle: {
              color: '#33CCFE',
              margin: 0,
              fontSize: FontChart(14),
            },
            formatter: function (value, index) {
              let s = value.split(' ')
              return s[1]
            },
          },
          axisTick: {
            show: false,
          },
          data: xdata
        }],
        yAxis: [{
          splitNumber: 4,
          name: '辆',
          nameTextStyle: {
            fontSize: FontChart(14),
            color: '#33CCFE',
            padding: [0, 0, 0, -50]
          },
          splitLine: {
            show: true,
            lineStyle: {
              color: '#092b5d'
            },
          },
          axisLine: {
            show: false,
            lineStyle: {
              color: '#263F74'
            }
          },
          axisLabel: {
            show: true,
            textStyle: {
              color: '#33CCFE',
              fontSize: FontChart(14),
            },
          },
          axisTick: {
            show: false,
          },
        }],
        series: [{
          name: '24h接入车辆数',
          type: 'line',
          symbol: 'circle', // 默认是空心圆（中间是白色的），改成实心圆
          showAllSymbol: true,
          symbolSize: 4,
          lineStyle: {
            normal: {
              color: '#00BFF7', // 线条颜色
            },
          },
          itemStyle: {
            color: '#00BFF7',
            borderColor: '#00BFF7',
            borderWidth: 2

          },
          label: {
            normal: {
              show: false,
              position: 'top',
              rich: {
                a: {
                  color: '#fff',
                  align: 'center',
                },
              }
            }
          },
          tooltip: {
            show: true
          },
          areaStyle: {
            normal: {
              color: new this.$echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                offset: 0,
                color: 'rgba(0, 156, 255, 0.3)'
              },
                {
                  offset: 1,
                  color: 'rgba(0, 156, 255, 0)'
                }
              ], false),
            }
          },
          data: that.ydata
        }]
      }
      myChart.clear()
      myChart.resize()
      myChart.setOption(option)
    },