Qt 线程实现方式1

谁践踏了优雅 2022-06-02 07:49 136阅读 0赞

#ifndef MYTHREAD_H
    #define MYTHREAD_H
    
    #include <QThread>
    
    class MyThread : public QThread
    {
        Q_OBJECT
    public:
        explicit MyThread(QObject *parent = nullptr);
    
    protected:
        void run();
    
    signals:
        void isDone();
    
    public slots:
    };
    
    #endif // MYTHREAD_H

#include "mythread.h"
    
    MyThread::MyThread(QObject *parent) : QThread(parent)
    {
    
    }
    
    void MyThread::run()
    {
        sleep(5);
    
        emit isDone();
    }

#ifndef WIDGET_H
    #define WIDGET_H
    
    #include <QWidget>
    #include "mythread.h"
    
    namespace Ui {
    class Widget;
    }
    
    class Widget : public QWidget
    {
        Q_OBJECT
    
    public:
        explicit Widget(QWidget *parent = 0);
        ~Widget();
        void dealDone();
        void stopThread();
    private slots:
        void on_pushButton_clicked();
    
    private:
        Ui::Widget *ui;
    
        MyThread *thread;
    };
    
    #endif // WIDGET_H

#include "widget.h"
    #include "ui_widget.h"
    #include <QDebug>
    
    Widget::Widget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::Widget)
    {
        ui->setupUi(this);
    
        thread = new MyThread(this);
        connect(thread, &MyThread::isDone, this, &Widget::dealDone);
        connect(this, &Widget::destroyed, this, &Widget::stopThread);
    }
    
    Widget::~Widget()
    {
        delete ui;
    }
    
    void Widget::on_pushButton_clicked()
    {
        thread->start();
    }
    
    void Widget::dealDone()
    {
        qDebug() << "time is over";
    }
    
    void Widget::stopThread()
    {
        thread->quit();
        thread->wait();
        qDebug() << "thread close";
    }

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