Echarts 中当y轴有负数时,让x轴下落在y轴最小值

    xAxis: {
                        type: 'category',
                        name:"Time(S)",
                        boundaryGap: false,
                        data: result.xAxisArry,
                        axisLine: {
                            onZero: false    //-----------重点
                        }
                    },