Qt关闭进程4种方法

相关资料：

https://download.csdn.net/download/zhujianqiangqq/53195067     代码包下载

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

#include <QCoreApplication>
#include <QDebug>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_pushButton_3_clicked();

    void on_pushButton_4_clicked();

private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    setWindowTitle(QStringLiteral("关闭进程4种方法"));
}

MainWindow::~MainWindow()
{
    delete ui;
}


void MainWindow::on_pushButton_clicked()
{
    qDebug() << "ThreadProcess::exit_exe:current_pid = " << QCoreApplication::applicationPid();
    std::string exit_cmd = "taskkill /f /PID " + std::to_string(QCoreApplication::applicationPid());
    system(exit_cmd.c_str());
}

void MainWindow::on_pushButton_2_clicked()
{
    exit(0);
}

void MainWindow::on_pushButton_3_clicked()
{
    close();
}

void MainWindow::on_pushButton_4_clicked()
{
    QCoreApplication::quit();
}