Qt数据可视化QChart - QSplineSeries平滑曲线图

注意：必须使用命名空间：QT_CHARTS_USE_NAMESPACE

如图：

代码：

#include <QApplication>
#include <QMainWindow>
#include <QChartView>
#include <QChart>
#include <QSplineSeries>

QT_CHARTS_USE_NAMESPACE
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QSplineSeries *series = new QSplineSeries();
    series->setName("spline");
    series->append(0, 6);
    series->append(2, 14);
    series->append(3, 8);
    series->append(4, 24);
    series->append(5, 9);
    series->append(6, 12);
    series->append(7, 4);
    series->append(8, 20);
    series->append(9, 14);
    series->append(10, 2);

    QChart *chart = new QChart();
    chart->addSeries(series);
    chart->setTitle("某数据走势");
    chart->legend()->hide();
    chart->createDefaultAxes();
    chart->axes(Qt::Vertical).first()->setRange(0,30);
    chart->setAnimationOptions(QChart::SeriesAnimations);

    /* 图例 */
    chart->legend()->setVisible(true);              // 是否显示
    chart->legend()->setAlignment(Qt::AlignBottom); // 显示位置

    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    QMainWindow  window;
    window.setWindowTitle("平滑曲线图展示实例");
    window.setCentralWidget(chartView);
    window.resize(600,300);
    window.show();
    return a.exec();
}