记录一下，以备以后查阅

效果图：

#include "mychart.h"
#include <QLineSeries>
#include <QChart>
#include <QChartView>
#include <QBoxLayout>
#include <QtMath>

QT_CHARTS_USE_NAMESPACE
MyChart::MyChart(QWidget *parent)
{
    resize(800,600);
    QLineSeries* series = new QLineSeries();//用于绘制二维数据点的折线图
    for(int i = 0; i < 97; ++i){
        series->append(QPointF(i, 10 * sin(i*M_PI*2/97.00)));
    }

    QChart *chart = new QChart;//管理和控制图表
    chart->addSeries(series);
    chart->createDefaultAxes();//创建坐标轴
    chart->axisY()->setRange(-10, 10);
    chart->axisX()->setRange(0, 96);

    chart->axisX()->setTitleFont(QFont("Microsoft YaHei", 10, QFont::Normal, true));
    chart->axisY()->setTitleFont(QFont("Microsoft YaHei", 10, QFont::Normal, true));
    chart->axisX()->setTitleText("Time/sec");
    chart->axisY()->setTitleText("Speed/m");

    chart->axisX()->setGridLineVisible(false);
    chart->axisY()->setGridLineVisible(false);
    /* hide legend */
    chart->legend()->hide();

    //视图组件(画布)，无法单独进行显示，需要依附其他组件进行显示
    QChartView *chartView = new QChartView(chart);
    QHBoxLayout *mainHorLayout = new QHBoxLayout(this);
    mainHorLayout->addWidget(chartView);
}