qml中刷新chartview中子对象的方法

一、刷新lowerSeries的高度：先删除再为lowerSeries增加两个点即可实现

        var l0x=northleft.lowerSeries.at(0).x;
        var l0y=northleft.lowerSeries.at(0).y;
        var l1x=northleft.lowerSeries.at(1).x;
        var l1y=northleft.lowerSeries.at(1).y;
        northleft.lowerSeries.remove(l0x,l0y);
        northleft.lowerSeries.remove(l1x,l1y);
        northleft.lowerSeries.append(l0x,950);
        northleft.lowerSeries.append(l1x,950);

二、其他设置

northrightline.axisX.visible=false;//不显示X轴坐标
northrightline.axisY.visible=false;//不显示Y轴坐标
northrightline.name="";
chartView01.backgroundColor="gray"; //设置chartview背景颜色