Qt5.9实现简单的多线程实例(类QThread)

#ifndef MYTHREAD_H
#define MYTHREAD_H
 
#include <QThread>
 
class MyThread : public QThread
{
public:
    MyThread();
    void closeThread();
 
protected:
    virtual void run();
 
private:
    volatile bool isStop;       //isStop是易失性变量，需要用volatile进行申明
};
 
#endif // MYTHREAD_H

#include "mythread.h"
#include <QDebug>
#include <QMutex>
 
MyThread::MyThread()
{
    isStop = false;
}
 
void MyThread::closeThread()
{
    isStop = true;
}
 
void MyThread::run()
{
    while (1)
    {
        if(isStop)
            return;
        qDebug()<<tr("mythread QThread::currentThreadId()==")<<QThread::currentThreadId();
        sleep(1);
    }
}

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <mythread.h>
#include <QPushButton>
#include <QVBoxLayout>
#include <QMutex>
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    Widget(QWidget *parent = 0);
    ~Widget();
    void createView();
 
private slots:
    void openThreadBtnSlot();
    void closeThreadBtnSlot();
    void finishedThreadBtnSlot();
//    void testBtnSlot();
 
private:
    QVBoxLayout *mainLayout;    
    MyThread *thread1;
};
 
#endif // WIDGET_H

#include "widget.h"
#include <QDebug>
#include <windows.h>
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    createView();
}
 
void Widget::createView()
{
        
    QPushButton *openThreadBtn = new QPushButton(tr("打开线程"));
    QPushButton *closeThreadBtn = new QPushButton(tr("关闭线程"));
    mainLayout = new QVBoxLayout(this);
    mainLayout->addWidget(openThreadBtn);
    mainLayout->addWidget(closeThreadBtn);
    mainLayout->addStretch();
    connect(openThreadBtn,SIGNAL(clicked(bool)),this,SLOT(openThreadBtnSlot()));
    connect(closeThreadBtn,SIGNAL(clicked(bool)),this,SLOT(closeThreadBtnSlot()));    
 
    
    thread1 = new MyThread;
    connect(thread1,SIGNAL(finished()),this,SLOT(finishedThreadBtnSlot()));
}
 
void Widget::openThreadBtnSlot()
{
        
    thread1->start();
    qDebug()<<"主线程id："<<QThread::currentThreadId();
}
 
void Widget::closeThreadBtnSlot()
{
    
    thread1->closeThread();
    thread1->wait();
}
 
void Widget::finishedThreadBtnSlot()
{
    qDebug()<<tr("完成信号finished触发");
}
 
Widget::~Widget()
{
}

#include "widget.h"
#include <QApplication>
 
int main(int arGC, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.resize(960,640);
    w.show();
 
    return a.exec();
}