在qt中使用QThread实现启动/停止/暂停

// MyThread.h
#include <QThread>

class MyThread : public QThread
{
    Q_OBJECT

public:
    MyThread(QObject *parent = nullptr);
    void run() override;
    void stop();
    void pause();
    void resume();

private:
    bool m_stopRequested;
    bool m_paused;

signals:
    void progress(int value);
};

// MyThread.cpp
#include "MyThread.h"

MyThread::MyThread(QObject *parent) : QThread(parent)
{
    m_stopRequested = false;
    m_paused = false;
}

void MyThread::run()
{
    for (int i = 0; i <= 100; ++i) {
        if (m_stopRequested)
            return;

        if (m_paused) {
            msleep(100); // 暂停100毫秒
            continue;
        }

        emit progress(i);
        msleep(50); // 每次处理耗时50毫秒
    }
}

void MyThread::stop()
{
    m_stopRequested = true;
}

void MyThread::pause()
{
    m_paused = true;
}

void MyThread::resume()
{
    m_paused = false;
}