Qt 一个简单的QChart 绘图

Qt 一个简单的QChart 绘图

先上程序运行结果图：

“sample9_1QChart.h” 文件代码如下：

#pragma once#include <QtWidgets/QMainWindow>
#include "ui_sample9_1QChart.h"#include <QtCharts>  //必须这么设置
QT_CHARTS_USE_NAMESPACE  //使用宏定义class sample9_1QChart : public QMainWindow
{Q_OBJECTpublic:sample9_1QChart(QWidget *parent = Q_NULLPTR);private:Ui::sample9_1QChartClass ui;private:void createChart();//
};

“sample9_1QChart.cpp” 文件代码如下：

#include "sample9_1QChart.h"//解决QT中中文显示乱码问题
#pragma execution_character_set("utf-8")sample9_1QChart::sample9_1QChart(QWidget *parent): QMainWindow(parent)
{ui.setupUi(this);createChart();
}//创建图表
void sample9_1QChart::createChart()
{QChartView *chartView = new QChartView(this); //创建 ChartViewQChart *chart = new QChart(); //创建 Chartchart->setTitle("简单函数曲线");chartView->setChart(chart); //Chart添加到ChartViewthis->setCentralWidget(chartView);//创建曲线序列QLineSeries *series0 = new QLineSeries();QLineSeries *series1 = new QLineSeries();series0->setName("Sin曲线");series1->setName("Cos曲线");chart->addSeries(series0); //序列添加到图表chart->addSeries(series1);//    QPen    pen;//    pen.setStyle(Qt::DotLine);//Qt::SolidLine, Qt::DashLine, Qt::DotLine, Qt::DashDotLine//    pen.setWidth(2);//    pen.setColor(Qt::red);//    series0->setPen(pen);//    pen.setStyle(Qt::SolidLine);//Qt::SolidLine, Qt::DashLine, Qt::DotLine, Qt::DashDotLine//    pen.setColor(Qt::blue);//    series1->setPen(pen);//序列添加数值qreal   t = 0, y1, y2, intv = 0.1;int cnt = 100;for (int i = 0; i < cnt; i++){y1 = qSin(t);//+qrand();series0->append(t, y1);y2 = qSin(t + 20);series1->append(t, y2);t += intv;}//    chart->createDefaultAxes();//    chart->axisX()->setTitleText("time(secs)");//    chart->axisY()->setTitleText("value");//创建坐标轴QValueAxis *axisX = new QValueAxis; //X 轴axisX->setRange(0, 10); //设置坐标轴范围//    axisX->setLabelFormat("%.1f"); //标签格式//    axisX->setTickCount(11); //主分隔个数//    axisX->setMinorTickCount(4);axisX->setTitleText("time(secs)"); //标题//    axisX->setGridLineVisible(false);QValueAxis *axisY = new QValueAxis; //Y 轴axisY->setRange(-2, 2);axisY->setTitleText("value");//    axisY->setTickCount(5);//    axisY->setMinorTickCount(4);//    axisY->setLabelFormat("%.2f"); //标签格式//    axisY->setGridLineVisible(false);chart->setAxisX(axisX, series0); //为序列设置坐标轴chart->setAxisY(axisY, series0); //chart->setAxisX(axisX, series1); //为序列设置坐标轴chart->setAxisY(axisY, series1); //
}

运行的时候报错，找不到 QtCharts

#include <QtCharts>  //必须这么设置
QT_CHARTS_USE_NAMESPACE  //使用宏定义

这两个报错

在项目名称上，右键打开项目属性，在图中以下路径添加 QtCharts 的include 配置

然后在 链接器-->输入-->附加依赖项 中添加上 “Qt5Chartsd.lib”

配置完成后，重新运行即可。

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