一個簡單的QChart繪圖程序

使用QChart模塊必須先在.pro文件中加入 QT+= charts
頭文件#include<QtCharts>
using namespace QtCharts;

void MainWindow::createChart()

{

    //創建圖表

    QChartView *chartview = new QChartView(this);

    QChart *chart = new QChart();

    chart->setTitle("簡單函數曲線");

    chartview->setChart(chart); //chart添加到chartView

    this->setCentralWidget(chartview);

    //創建折線序列

    QLineSeries *series0 =new QLineSeries();

    QLineSeries *series1 =new QLineSeries();

    series0->setName("sin");

    series1->setName("cos");

    chart->addSeries(series0);

    chart->addSeries(series1);

    //序列添加數值

    qreal t=0,y1,y2,v= 0.1;

    int cnt = 100;

    for(int i =0 ;i< cnt;i++)

    {

        y1=qSin(t);

        series0->append(t,y1);

        y2=qSin(t+20);

        series1->append(t,y2);

        t+=v;

    }

    //創建坐標軸

    QValueAxis *axisX = new QValueAxis ();

    axisX->setRange(0,10); //設置坐標軸范圍

    axisX->setTitleText("time");//標題

    QValueAxis *axisY = new QValueAxis ();

    axisY->setRange(-2,2); //設置坐標軸范圍

    axisY->setTitleText("time");//標題

    chart->setAxisX(axisX,series0);

    chart->setAxisY(axisY,series0);

    chart->setAxisX(axisX,series1);

    chart->setAxisY(axisY,series1);

}