drawLine () {
      var that = this
      window.addEventListener('resize', this.drawLine)
      const myChart = this.$echarts.init(this.$refs.echarts)
      var category = []
      var dottedBase = +new Date()
      var lineData = []
      var barData1 = []
      var barData2 = []
      for (var i = 0; i < 30; i++) {
        var date = new Date(dottedBase += 1000 * 3600 * 24)
        category.push([
          date.getFullYear(),
          date.getMonth() + 1,
          date.getDate()
        ].join('-'))
        // if (i<=10&&i>=1){
        //     category.push(i);
        // }
        var b = Math.random() * 200
        var d = Math.random() * (-200)
        barData1.push(b)
        barData2.push(d)
      }

      var option = {
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'shadow',
            label: {
              show: true,
              backgroundColor: '#333'
            }
          }
        },
        grid: {
          top: '15%',
          left: '3%',
          right: '2%',
          bottom: '5%',
          containLabel: true
        },
        legend: {
          data: ['收入', '支出'],
          show: false,
          textStyle: {
            color: '#ccc'
          }
        },
        xAxis: {
          type: 'category',
          data: category,
          axisTick: {
            alignWithLabel: true
          },
          splitLine: {
            show: false,
            lineStyle: {
              color: '#274179'
            }
          },
          axisLine: {
            show: true,
            lineStyle: {
              color: '#203B70'
            }
          },
          axisLabel: {
            fontsize: 2,
            align: 'center',
            color: 'rgba(143, 178, 204, 1)'
          }
        },
        yAxis: [{
          type: 'value',
          splitLine: {
            show: true,
            lineStyle: {
              color: '#274179'
            }
          },
          axisLine: {
            show: true,
            lineStyle: {
              color: '#203B70'
            }
          },
          axisLabel: {
            fontWeight: 10,
            fontsize: 18,
            color: 'rgba(143, 178, 204, 1)'
          }
        }],
        series: [{
          name: '收入',
          type: 'bar',
          stack: '总量',
          barWidth: 18,
          itemStyle: {
            normal: {
              barBorderRadius: 0,
              color: new this.$echarts.graphic.LinearGradient(
                0, 0, 0, 1,
                [
                  {
                    offset: 0,
                    color: 'rgba(45, 152, 252, 1)'
                  },
                  {
                    offset: 1,
                    color: 'rgba(64, 192, 252, 1)'
                  }
                ]
              )
            }
          },
          data: barData1
        }, {
          name: '支出',
          type: 'bar',
          stack: '总量',
          barWidth: 18,
          itemStyle: {
            normal: {
              barBorderRadius: 0,
              color: new this.$echarts.graphic.LinearGradient(
                0, 0, 0, 1,
                [
                  {
                    offset: 0,
                    color: 'rgba(255, 194, 0, 1)'
                  },
                  {
                    offset: 1,
                    color: 'rgba(255, 154, 0, 1)'
                  }
                ]
              )
            }
          },
          data: barData2
        }]
      }
      myChart.clear()
      myChart.resize()
      myChart.setOption(option)
    },