如何将Qt窗口应用程序改成控制台程序呢？

下面进入正文，如何控制控制台程序退出呢？

这里采用线程方式，通过单独线程监视用户输入来执行是否退出程序。

 监视线程头文件thread.h

#include <QThread>
#include "TDRServerDLL.h"class CMyKeyEventThread : public QThread
{Q_OBJECT
public:explicit CMyKeyEventThread(QObject *parent = 0);protected:void run();
};

监视线程源文件thread.cpp

//按"Q"键退出应用程序#include "thread.h"
#include <stdio.h>CMyKeyEventThread::CMyKeyEventThread(QObject *parent) : QThread(parent)
{}void CMyKeyEventThread::run()
{const char *pszTip = "Press 'Q' exit application.\n";printf("%s\n", pszTip);while (true){printf("%s", pszTip);if (getchar() == 'Q'){//这里为程序退出前需执行的操作mwArray result;TDRSvrStopScan(1, result);printf("Done.");TDRSvrUninit();break;}}printf("Done.");
}

main.cpp

#include "mainwindow.h"
#include "thread.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);MainWindow w;//w.show();CMyKeyEventThread *exitEvent = new CMyKeyEventThread();QObject::connect(exitEvent, SIGNAL(finshed()), &a, SLOT(quit())); //连接信号exitEvent->start();//启动线程return a.exec();
}