Qt5.9继承QObject创建多线程实例

myObjectThread->moveToThread(firstThread);

connect(firstThread,SIGNAL(started()),myObjectThread,SLOT(startThreadSlot()));

connect(firstThread,SIGNAL(finished()),firstThread,SLOT(deleteLater()));

#ifndef MYTHREAD_H
#define MYTHREAD_H
 
#include <QObject>
 
class MyThread : public QObject
{
    Q_OBJECT
public:
    explicit MyThread(QObject *parent = nullptr);
 
    void closeThread();
 
signals:
 
public slots:
    void startThreadSlot();
 
private:
    volatile bool isStop;
};
 
#endif // MYTHREAD_H

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

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <QVBoxLayout>
#include <QPushButton>
#include <QThread>
#include "mythread.h"
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    Widget(QWidget *parent = 0);
    ~Widget();
 
    void createView();
 
private slots:
    void openThreadSlot();
    void closeThreadSlot();
    void finishedThreadSlot();
 
private:
    QVBoxLayout *mainLayout;
    QThread *firstThread;
    MyThread *myObjectThread;
};
 
#endif // WIDGET_H

#include <QDebug>
#include "widget.h"
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    createView();
}
 
Widget::~Widget()
{
}
 
void Widget::createView()
{
    
    mainLayout = new QVBoxLayout(this);
    QPushButton *openThreadBtn = new QPushButton(tr("打开线程"));
    QPushButton *closeThreadBtn = new QPushButton(tr("关闭线程"));
    mainLayout->addWidget(openThreadBtn);
    mainLayout->addWidget(closeThreadBtn);
    mainLayout->addStretch();
    connect(openThreadBtn,SIGNAL(clicked(bool)),this,SLOT(openThreadSlot()));
    connect(closeThreadBtn,SIGNAL(clicked(bool)),this,SLOT(closeThreadSlot()));
}
 
void Widget::openThreadSlot()
{
    
    qDebug()<<tr("开启线程");
    firstThread = new QThread;                                                      //线程容器
    myObjectThread = new MyThread;
    myObjectThread->moveToThread(firstThread);                                      //将创建的对象移到线程容器中
    connect(firstThread,SIGNAL(finished()),myObjectThread,SLOT(deleteLater()));        //终止线程时要调用deleteLater槽函数
    connect(firstThread,SIGNAL(started()),myObjectThread,SLOT(startThreadSlot()));  //开启线程槽函数
    connect(firstThread,SIGNAL(finished()),this,SLOT(finishedThreadSlot()));
    firstThread->start();                                                           //开启多线程槽函数
    qDebug()<<"mainWidget QThread::currentThreadId()=="<<QThread::currentThreadId();
}
 
void Widget::closeThreadSlot()
{        
    qDebug()<<tr("关闭线程");
    if(firstThread->isRunning())
    {
        myObjectThread->closeThread();  //关闭线程槽函数
        firstThread->quit();            //退出事件循环
        firstThread->wait();            //释放线程槽函数资源
    }
}
 
void Widget::finishedThreadSlot()
{
    qDebug()<<tr("多线程触发了finished信号123");
}

#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();
}