天天向上

void MainWindow::on_tabWidget_tabCloseRequested(int index)

{

    ui->tabWidget->removeTab(index);

}

#ifndef FORM_H

#define FORM_H

#include <QWidget>

namespace Ui {

class Form;

}

class Form : public QWidget

{

    Q_OBJECT

public:

    explicit Form(QWidget *parent = nullptr);

    ~Form();

private slots:

    void on_pushButton_clicked();

public slots:

    void run_job_periodically();

private:

    Ui::Form *ui;

    int counter;

    QTimer *timer;

};

#endif // FORM_H

#include "form.h"

#include "ui_form.h"

#include <QtCore>

Form::Form(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Form)

{

    ui->setupUi(this);

    timer = new QTimer(this);

    counter = 0;

    connect(timer, SIGNAL(timeout()), this, SLOT(run_job_periodically()));

}

Form::~Form()

{

    delete ui;

}

void Form::on_pushButton_clicked()

{

    timer->start(500);

}

void Form::run_job_periodically()

{

    counter++;

    ui->label->setText(QString::number(counter));

}