Qt多线程与定时器-优快云博客

本文链接：https://blog.youkuaiyun.com/sunxiaopengsun/article/details/82970907

本文探讨了Qt中多线程的实现方式，通过MyThread和Worker类展示了如何创建和使用线程，同时介绍了QTimer类的用法，用于在主线程与工作线程间触发定时任务。

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#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;

    QObject::connect(timer, SIGNAL(timeout()), worker, SLOT(doWork()));
    timer->setInterval(1000);
    timer->start();

    return app.exec();
}

#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

#include "mythread.h"

MyThread::MyThread(QObject *parent) :
    QThread(parent)
{
}

#ifndef WORKER_H
#define WORKER_H

#include <QObject>
#include <QThread>
#include <QDebug>
class Worker : public QObject
{
    Q_OBJECT
public:
    explicit Worker(QObject *parent = 0);

    QThread _thread;

    bool event(QEvent *ev)
    {
        qDebug() << "event:"<<QThread::currentThread();
        return QObject::event(ev);
    }

signals:

public slots:
    void doWork()
    {
        // do ......
        qDebug() << QThread::currentThread();
    }
};

#endif // WORKER_H

#include "worker.h"

Worker::Worker(QObject *parent) :
    QObject(parent)
{
   // this->moveToThread(&_thread);
    _thread.start();
    connect(&_thread, SIGNAL(finished()), this, SLOT(deleteLater()));
}