QProcess介绍

https://www.jb51.net/program/295820rdz.htm

常见用法

• 调用本地资源器打开目录
  https://blog.csdn.net/Helloorld_1/article/details/134115123

• 杀死程序进程

            //kill自己
            int pid = qApp->applicationPid();
            QString killCmd;
#if defined(Q_OS_MACOS)
            killCmd = QString("kill -9 %1").arg(pid);
#elif defined(Q_OS_WINDOWS)
            killCmd = QString("taskkill /pid %1 /f").arg(pid);
#endif
            QProcess::startDetached(killCmd);

相关报错

• Process is already running
  https://blog.csdn.net/hanzengyi/article/details/7288107
  QProcess每次调用完毕后都调用QProcess::terminate ()结束