opencv---小知识记录

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结束进程

在ThreadDialog中构建了两个进程,threadA和threadB。
在关闭ThreadDialog后，这两个进程都需要结束
代码如下:

void ThreadDialog::closeEvent(QCloseEvent *event){    threadA.terminate();    threadB.terminate();    threadA.wait();    threadB.wait();    event->accept();}

结束任务管理器中正在运行的exe文件

方式一:

头文件:

#include <QMainWindow>#include<QThread>#include<iostream>#include<QString>#include<QFileDialog>#include<QMessageBox>#include<opencv/cv.h>#include<QTextCodec>#include<QFont>#include<opencv2/opencv.hpp>#include <QApplication>#include <QProcess>#include <windef.h>#include <tlhelp32.h>

main.cpp

#include "threaddialog.h"void killProcess(QString ProcessName){    bool result = false;    QString str1;    HANDLE hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0) ;    PROCESSENTRY32 pInfo;    pInfo.dwSize = sizeof(pInfo);    Process32First(hSnapShot, &pInfo);    do    {        str1 = (QString::fromUtf16(reinterpret_cast<const unsigned short *>(pInfo.szExeFile)));        if (str1 == ProcessName)        {            result = true;            QString cmd;            cmd = QString("taskkill /F /PID %1 /T").arg(pInfo.th32ProcessID);            system(cmd.toLatin1());        }    } while(Process32Next(hSnapShot, &pInfo) );    cout<<result<<endl;}int main(int argc, char *argv[]){    QApplication a(argc, argv);    ThreadDialog *threaddialog = new ThreadDialog;    threaddialog->exec();    killProcess("multiThread");    return a.exec();}

方式二
main.cpp

#include "threaddialog.h"int main(int argc, char *argv[]){    QApplication a(argc, argv);    ThreadDialog *threaddialog = new ThreadDialog;    threaddialog->exec();    //用于结束线程。如果multiThread.EXE在任务管理器中未关闭，便结束该程序    QProcess process;    process.execute("TASKKILL /IM multiThread.EXE /F");    process.close();    return a.exec();}

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