当出节点出现异常时，整个坐标背景变成黄色，在打印区域打印数据字体同为黄色！

//设置坐标颜色/坐标名称颜色

ui->qCustomPlot->yAxis->setLabelColor(TextColor);

ui->qCustomPlot->xAxis->setTickLabelColor(TextColor);

ui->qCustomPlot->yAxis->setTickLabelColor(TextColor);

ui->qCustomPlot->xAxis->setBasePen(QPen(TextColor, TextWidth));

ui->qCustomPlot->yAxis->setBasePen(QPen(TextColor, TextWidth));

ui->qCustomPlot->xAxis->setTickPen(QPen(TextColor, TextWidth));

ui->qCustomPlot->yAxis->setTickPen(QPen(TextColor, TextWidth));

ui->qCustomPlot->xAxis->setSubTickPen(QPen(TextColor, TextWidth));

ui->qCustomPlot->yAxis->setSubTickPen(QPen(TextColor, TextWidth));

//设置画布背景色

QLinearGradient plotGradient;

plotGradient.setStart(0, 0);

plotGradient.setFinalStop(0, 350);

plotGradient.setColorAt(0, QColor(80, 80, 80));

plotGradient.setColorAt(1, QColor(50, 50, 50));

ui->qCustomPlot->setBackground(plotGradient);

//设置坐标背景色

QLinearGradient axisRectGradient;

axisRectGradient.setStart(0, 0);

axisRectGradient.setFinalStop(0, 350);

axisRectGradient.setColorAt(0, QColor(80, 80, 80));

axisRectGradient.setColorAt(1, QColor(30, 30, 30));

ui->qCustomPlot->axisRect()->setBackground(axisRectGradient);

//设置图例提示位置及背景色

ui->qCustomPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignTop | Qt::AlignRight);

ui->qCustomPlot->legend->setBrush(QColor(255, 255, 255, 200));

ui->qCustomPlot->replot();