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4.QT中进程操作，线程操作

發(fā)布時(shí)間：2024/9/27 c/c++ 28 豆豆

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QT中的線程操作

T19Process.pro

SOURCES += \

??? main.cpp

CONFIG += C++11

main.cpp

#include <QCoreApplication> #include <QProcess> #include <QDebug> int main(int argc, char** argv) { ??? QCoreApplication app(argc, argv); ? ??? QProcess process; ??? // process.start("/home/xuegl/T0718/build-T18Database-Desktop-Debug/T18Database"); ??? process.start("ssh root@42.121.13.248"); ??? // process.start("ssh", QStringList() << "root@42.121.13.248" << "aa" << "bbb"); ??? // process.write("1\n", 2); ??? process.waitForFinished(); ? ??? // process.waitForFinished(); ??? qDebug() << process.readAll(); ??? // qDebug() << process.exitCode(); ? ??? return app.exec(); }

多線程（可以通過moveToThread(QThread *)的方法指定給指定的線程）

新建項(xiàng)目T20Thread,項(xiàng)目代碼如下：

T20Thread.pro

HEADERS += \

??? Worker.h \

??? MyThread.h

SOURCES += \

??? Worker.cpp \

??? MyThread.cpp \

??? main.cpp

Worker.h

#ifndef WORKER_H

#define WORKER_H

#include <QObject>

#include <QThread>? //要開啟線程的時(shí)候需要使用頭文件<QThread>

#include <QDebug>

class Worker : public QObject

{

??? Q_OBJECT

public:

??? explicit Worker(QObject *parent = 0);

??? QThread _thread;

??? bool event(QEvent *ev)

??? {

??????? //通過QThread::currentThread()可以獲得當(dāng)前線程信息

??????? qDebug() << "event:" << QThread::currentThread();

??????? return QObject::event(ev);

??? }

signals:

public slots:

??? void doWork()

??? {

??????? qDebug() << QThread::currentThread();

??? }

};

#endif // WORKER_H

Worker.cpp

#include "Worker.h"

Worker::Worker(QObject *parent) :

??? QObject(parent)

{

??? //this->moveToThread(&_thread);

??? _thread.start();

??? connect(&_thread, SIGNAL(finished()), this, SLOT(deleteLater()));

}

MyThread.h

#ifndef MYTHREAD_H

#define MYTHREAD_H

#include <QThread>

#include <QDebug>

class MyThread : public QThread

{

??? Q_OBJECT

public:

??? explicit MyThread(QObject *parent = 0);

??? void foo()

??? {

??????? qDebug() << QThread::currentThread();

??? }

??? void run()

??? {

??????? foo();

??????? qDebug() << "thread is run";

??? }

signals:

public slots:

};

#endif // MYTHREAD_H

MyThread.cpp

#include "mythread.h"

MyThread::MyThread(QObject *parent) :

??? QThread(parent)

{

}

main.cpp

#include <QCoreApplication>

#include "mythread.h"

#include "worker.h"

#include <QTimer>

int main(int argc, char* argv[])

{

??? QCoreApplication app(argc, argv);

#if 0

??? MyThread thread;

??? thread.start();

??? thread.foo();

#endif

??? qDebug() << "main thread is"<<QThread::currentThread();

??? Worker* worker = new Worker();

??? QTimer* timer = new QTimer;

??? //worker->moveToThread(&thread);

??? QObject::connect(timer, SIGNAL(timeout()), worker, SLOT(doWork()));

??? timer->setInterval(1000);

??? timer->start();

??? return app.exec();

}

運(yùn)行結(jié)果：

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