qt实时绘制温度曲线图

Qt中可以使用QCustomPlot绘制实时温度曲线图。首先，需要在Qt中安装QCustomPlot插件，然后在代码中添加头文件，创建QCustomPlot对象，并设置坐标轴。接着，通过在定时器中获取新的温度数据，并使用addData()函数将其添加到曲线图中，实现实时绘制。最后，通过replot()函数刷新图形。代码示例如下：

#include <QtWidgets>
#include "qcustomplot.h"
int main(int argc, char *argv[])
    QApplication a(argc, argv);
    QCustomPlot *customPlot = new QCustomPlot;
    customPlot->addGraph();
    customPlot->graph(0)->setPen(QPen(Qt::blue));
    customPlot->xAxis->setLabel("x");
    customPlot->yAxis->setLabel("y");
    customPlot->xAxis->setRange(0, 10);
    customPlot->yAxis->setRange(0, 100);
    customPlot->replot();
    customPlot->show();
    QTimer dataTimer;
    QObject::connect(&dataTimer, &QTimer::timeout, [customPlot](){
        static double x = 0;
        double y = qSin(x) + qrand() / (double)RAND_MAX * 0.5;
        customPlot->graph(0)->addData(x, y);
        customPlot->xAxis->setRange(x, 10, Qt::AlignRight);
        customPlot->replot();
        x += 0.1;
    dataTimer.start(100);
    return a.exec();
        mahuifa