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1、创建QT GUI应用，基类选择"QMainWindows"，在.pro中添加： QT += charts
在源文件中添加： #include <QtCharts>
2、在构造函数中添加： QChartView *chartView = new QChartView(this);
QChartView *chartView = new QChartView(this); QChart *chart = new QChart(); chart->setTitle("简单函数曲线"); //图标的名字 chartView->setChart(chart); setCentralWidget(chartView);
QChartView *chartView = new QChartView(this); QChart *chart = new QChart(); chart->setTitle("简单函数曲线"); //图标的名字 chartView->setChart(chart); setCentralWidget(chartView); //创建曲线序列 QLineSeries *series0 = new QLineSeries(); QLineSeries *series1 = new QLineSeries(); series0->setName("sin曲线"); //自动添加折线名字 series1->setName("cos曲线"); chart->addSeries(series0); chart->addSeries(series1);
QChartView *chartView = new QChartView(this); QChart *chart = new QChart(); chart->setTitle("简单函数曲线"); //图标的名字 chartView->setChart(chart); setCentralWidget(chartView); //创建曲线序列 QLineSeries *series0 = new QLineSeries(); QLineSeries *series1 = new QLineSeries(); series0->setName("sin曲线"); //自动添加折线名字 series1->setName("cos曲线"); chart->addSeries(series0); chart->addSeries(series1); //序列添加数值 qreal t = 0, y1, y2, intv = 0.1; int cnt = 200; for(int i = 0; i < cnt; ++i){ y1 = qSin(t); series0->append(t, y1); y2=qSin(t+20); series1->append(t,y2); t+=intv; //每次角度增加 } //创建坐标 QValueAxis *axisX = new QValueAxis; axisX->setRange(0, 10);//设置坐标轴范围 axisX->setTitleText("time(secs)");//标题 axisX->setLabelFormat("%.1f"); //标签格式：每个单位保留几位小数 axisX->setTickCount(20); //主分隔个数：0到10分成20个单位 axisX->setMinorTickCount(4); //每个单位之间绘制了多少虚网线 // axisX->setGridLineVisible(false); QValueAxis *axisY = new QValueAxis; //Y 轴 axisY->setRange(-2, 2); axisY->setTitleText("value"); axisY->setLabelFormat("%.2f"); //标签格式 axisY->setTickCount(10); axisY->setMinorTickCount(4); // axisX->setGridLineVisible(false); //为序列设置坐标轴 chart->setAxisX(axisX, series0); chart->setAxisY(axisY, series0); chart->setAxisX(axisX, series1); chart->setAxisY(axisY, series1);