amcharts多个系列无法正常工作

Question

我在角度6中使用Amcharts 4 我将使用多个数据创建折线图 当用户单击按钮从服务器获取数据并添加到系列并显示在图表上时 我的数据是月份名称和值 首先，我定义全局图表变量

    private chart: am4charts.XYChart;

i配置图表

let chart = am4core.create("chartdiv", am4charts.XYChart);
        chart.paddingRight = 20;
        let monthAxis = chart.xAxes.push(new am4charts.CategoryAxis());
        monthAxis.renderer.grid.template.location = 0;
        monthAxis.dataFields.category = "month";
        monthAxis.title.text = 'ماه'
        let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
        valueAxis.tooltip.disabled = true;
        valueAxis.renderer.minWidth = 35;
        chart.cursor = new am4charts.XYCursor();

并且通过从服务器获取数据来添加系列

this.adminService.getSaleReport(this.fillterValues).subscribe((res) => {

            let series1 = chart.series.push(new am4charts.LineSeries());
            series1.data = res;
            series1.name = "فروش";
            series1.dataFields.valueY = "count";
            series1.dataFields.categoryX = "month";
            chart.invalidateData();
        });

在右侧显示所有系列