Qt6.3.2下QChart的使用

一、Qt6.3.2下Qt Charts的安装

环境：win11，Qt6.3.2
选择在线安装，安装的时候选择6.3.2，下面的additional library全选

二、CMakeList.txt文件改写

生成新工程后，如果直接用QChart是会有各种奇怪错误。需要在CMakeList.txt中增加两行：

find_package(Qt6 REQUIRED COMPONENTS Charts)
target_link_libraries(mychart PUBLIC
    Qt::Charts
)

三、例子

其他代码的写法参照网上或例程即可。

#include "widget.h"
#include "./ui_widget.h"

#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QValueAxis>
#include <QtCharts/QSplineSeries>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    QSplineSeries *series1 = new QSplineSeries();//实例化一个QLineSeries对象
    series1->setColor(QColor(0,100,255));
    series1->append(QPointF(0,rand()%200)) ;
    series1->append(QPointF(30,rand()%200)) ;
    series1->append(QPointF(60,rand()%200)) ;
    series1->append(QPointF(90,rand()%200)) ;
    series1->append(QPointF(120,rand()%200)) ;
    series1->setName("线条1");

    series1->setVisible(true);
    series1->setPointLabelsFormat("(@xPoint,@yPoint)");
    series1->setPointLabelsVisible(true);

    QChart *m_chart;
    m_chart = new QChart;
    m_chart->setTheme(QChart::ChartThemeLight);//设置白色主题
    m_chart->setDropShadowEnabled(true);//背景阴影    m_chart->setAutoFillBackground(true);  //设置背景自动填充
    m_chart->addSeries(series1);//添加系列到QChart上


    m_chart->setTitleBrush(QBrush(QColor(0,0,255)));//设置标题Brush
    m_chart->setTitleFont(QFont("微软雅黑"));//设置标题字体
    m_chart->setTitle("曲线图");


    //创建X轴和Y轴
    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(0,150);    //默认则坐标为动态计算大小的
    axisX->setLabelFormat("%dS");
    QValueAxis *axisY = new QValueAxis;
    axisY->setRange(0,250);    //默认则坐标为动态计算大小的
    axisY->setTitleText("value值");

    m_chart->setAxisX(axisX,series1);
    m_chart->setAxisY(axisY,series1);
    //m_chart->createDefaultAxes();             //或者创建默认轴

    //修改说明样式
    m_chart->legend()->setVisible(true);
    m_chart->legend()->setAlignment(Qt::AlignBottom);//底部对齐
    m_chart->legend()->setBackgroundVisible(true);//设置背景是否可视
    m_chart->legend()->setAutoFillBackground(true);//设置背景自动填充
    m_chart->legend()->setColor(QColor(222,233,251));//设置颜色
    m_chart->legend()->setLabelColor(QColor(0,100,255));//设置标签颜色
    m_chart->legend()->setMaximumHeight(50);
    QChartView *chartView = new QChartView(m_chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    QVBoxLayout *pVLayout = new QVBoxLayout(this);//ui->verticalLayout;//
    pVLayout->addWidget(chartView);

    resize(960, 720);

}


Widget::~Widget()
{
    delete ui;
}

四、结果

这运行结果：