本文主要介绍了Qt QChart 创建图表，分享给大家，也给自己留个笔记，废话不多说，具体如下：

效果

流程

代码

1. 饼图

// 保存多个扇形 QList<QPieSlice *> slices; for (int i = 1; i <= 10; ++i) { // 创建一个扇形 QPieSlice * slice = new QPieSlice(QString::number(i),i); slices << slice; } // 创建一个饼图系列 QPieSeries * pieSeries = new QPieSeries; // 当鼠标悬浮时设置标签可见，设置饼图扇形分离 QObject::connect(pieSeries,&QPieSeries::hovered , [](QPieSlice *slice, bool state) { slice->setLabelVisible(state); slice->setExploded(state); }); // 将所有扇形所加到饼图中 pieSeries->append(slices); // 创建一个图表 QChart * chart = new QChart; // 设置标题 chart->setTitle(QStringLiteral("饼图")); // 设置动画 chart->setAnimationOptions(QChart::AllAnimations); // 设置图表的系列 chart->addSeries(pieSeries); // 创建图表视图，显示图表 pView = new QChartView(chart); // 设置抗锯齿 pView->setRenderHint(QPainter::Antialiasing); // 添加图表视图到布局 QVBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(pView);

2. 柱图

// 保存柱集合 QList<QBarSet *> sets; for (int i = 1; i <= 5; ++i) { // 创建一个柱集合 QBarSet * set = new QBarSet(QString("set").append(QString::number(i))); QList<qreal> values; for (int j = 1; j <= 5; ++j) { values << qrand()%100; qDebug() << values; } set->append(values); sets << set; } // 创建一个柱图系列 QBarSeries * barSeries = new QBarSeries; // 添加柱集合 barSeries->append(sets); QChart * chart = new QChart; chart->setTitle(QStringLiteral("柱状图")); chart->setAnimationOptions(QChart::AllAnimations); chart->addSeries(barSeries); pView = new QChartView(chart); pView->setRenderHint(QPainter::Antialiasing); QVBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(pView);

3. 折/曲线图

// 创建并保存点信息 QList<QPointF> points; points << QPointF(0, -1) << QPointF(2, 2) << QPointF(3, 5) << QPointF(5, -5) << QPointF(6, 0) << QPointF(7, 3); // 创建线图系列 QLineSeries * lineSeries = new QLineSeries; // 曲线 //QSplineSeries * lineSeries = new QSplineSeries; // 追加点 lineSeries->append(points); QChart * chart = new QChart; chart->setTitle(QStringLiteral("线图")); chart->setAnimationOptions(QChart::AllAnimations); chart->addSeries(lineSeries); pView = new QChartView(chart); pView->setRenderHint(QPainter::Antialiasing); QVBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(pView);

4. 区域图

QList<QPointF> pointsLower; pointsLower << QPointF(0, -1) << QPointF(2, 2) << QPointF(3, 5) << QPointF(5, -5) << QPointF(6, 0) << QPointF(7, 3); // 创建一条线 QLineSeries * lineSeriesLower = new QLineSeries; lineSeriesLower->append(pointsLower); QList<QPointF> pointsUpper; pointsUpper << QPointF(0, -1) << QPointF(2, 4) << QPointF(3, 3) << QPointF(5, 3) << QPointF(6, 1) << QPointF(7, 5); // 创建另一条线 QLineSeries * lineSeriesUpper = new QLineSeries; lineSeriesUpper->append(pointsUpper); // 两条线组成面 QAreaSeries * areaSeries = new QAreaSeries(lineSeriesLower, lineSeriesUpper); QChart * chart = new QChart; chart->setTitle(QStringLiteral("区域图")); chart->setAnimationOptions(QChart::AllAnimations); chart->addSeries(areaSeries); pView = new QChartView(chart); pView->setRenderHint(QPainter::Antialiasing); QVBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(pView);

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