QT多线程开发（二）——QT开启多个子线程方法

使用movetoThread方法。、

1、新建项目

新建MainWindow和MyThread。

2、代码如下

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QThread>
#include "mythread.h"

namespace Ui {
    
    
class MainWindow;
}

class MainWindow : public QMainWindow
{
    
    
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

private:
    Ui::MainWindow *ui;

    QThread *m_Thread;
    MyThread *m_MyThread;
signals:
    void signal01();

};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    
    
    ui->setupUi(this);
    qDebug()<<"主线程号："<<QThread::currentThread()<<QThread::currentThreadId();
}

MainWindow::~MainWindow()
{
    
    
    delete ui;
}
//每点击一次按钮，新建一个子线程
void MainWindow::on_pushButton_clicked()
{
    
    
    qDebug()<<"新建线程";
    m_Thread = new QThread();
    m_MyThread = new MyThread();
    m_MyThread->moveToThread(m_Thread);
    connect(m_Thread,&QThread::finished,m_Thread,&QThread::deleteLater);
    connect(this,&MainWindow::signal01,m_MyThread,&MyThread::doSomething);
    m_Thread->start();

}

void MainWindow::on_pushButton_2_clicked()
{
    
    
    qDebug()<<"信号";
    emit signal01();
}

mythread.h

#ifndef MYTHREAD_H
#define MYTHREAD_H

#include <QObject>

class MyThread : public QObject
{
    
    
    Q_OBJECT
public:
    explicit MyThread(QObject *parent = nullptr);

signals:

public slots:
    void doSomething();
};

#endif // MYTHREAD_H

mythread.cpp

#include "mythread.h"
#include <QDebug>
#include <QThread>

MyThread::MyThread(QObject *parent) : QObject(parent)
{
    
    
    qDebug()<<"MyThread"<<QThread::currentThread();
}

void MyThread::doSomething()
{
    
    
    qDebug()<<"子线程号："<<QThread::currentThread();
}

运行效果

不足之处

这里没有将每次新建的子线程进行记录，会导致信号触发到所有新建的子线程中。下一步使用Vector将子线程记录下来，区分新建的子线程。