我需要使用qt中的QChartView在QWidget上画一个直方图，请写出代码

好的，以下是一个在QWidget上画直方图的示例代码：

#include <QWidget>
#include <QtCharts/QChartView>
#include <QtCharts/QBarSeries>
#include <QtCharts/QBarSet>
#include <QtCharts/QValueAxis>
#include <QtCharts/QBarCategoryAxis>

QT_CHARTS_USE_NAMESPACE

class HistogramWidget : public QWidget {
public:
    HistogramWidget(QWidget *parent = nullptr) : QWidget(parent) {
        QChart *chart = new QChart();

        QBarSeries *series = new QBarSeries();
        QBarSet *set = new QBarSet("Data");

        // 以下为假数据，实际使用时需要修改为真实数据
        *set << 1 << 2 << 3 << 4 << 5 << 6 << 7 << 8 << 9 << 10;
        series->append(set);

        chart->addSeries(series);
        chart->setTitle("Histogram");
        chart->setAnimationOptions(QChart::SeriesAnimations);

        QValueAxis *axisX = new QValueAxis();
        axisX->setLabelFormat("%d");
        axisX->setTitleText("X Axis");
        chart->addAxis(axisX, Qt::AlignBottom);
        series->attachAxis(axisX);

        QBarCategoryAxis *axisY = new QBarCategoryAxis();
        axisY->setTitleText("Y Axis");
        chart->addAxis(axisY, Qt::AlignLeft);
        series->attachAxis(axisY);

        QChartView *chartView = new QChartView(chart);
        chartView->setRenderHint(QPainter::Antialiasing);
        setCentralWidget(chartView);
    }
};

在窗口中创建一个HistogramWidget的实例，即可在QWidget上画出一个直方图。