关于QT多线程子线程使用信号和

最新推荐文章于 2023-12-19 17:53:58 发布

原创最新推荐文章于 2023-12-19 17:53:58 发布 · 900 阅读

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本文介绍了一个基于Qt的多线程通信示例，包括如何创建和使用自定义线程类QSYSendThread，该类继承自QThread。文章详细展示了如何实现定时重连、错误处理等功能，并通过客户端与服务器之间的连接状态变化触发相应的槽函数。

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主线程最后必须调用exit()和wait()函数

源码地址 http://download.youkuaiyun.com/download/u010261063/10185891

#ifndef QSYSENDTHREAD_H
#define QSYSENDTHREAD_H

#include <QThread>
#include<QTcpSocket>
#include<common.h>
#include<QTimer>
class QSYSendThread : public QThread
{
    Q_OBJECT
public:
    explicit QSYSendThread(QObject *parent = 0);

signals:

public slots:
    void ClientClosed();
    void ClientError(QAbstractSocket::SocketError socketError);
    void TimeOut();
public:
    void run();
private:
    QTcpSocket *m_client;
    QString m_conectIP;
    bool m_bconnect;
    uint m_connectPort;
    QTimer *m_pTimer;
};

#endif // QSYSENDTHREAD_H

源文件

#include "qsysendthread.h"

QSYSendThread::QSYSendThread(QObject *parent) : QThread(parent)
{

}
void QSYSendThread::run()
{
    m_conectIP = g_EnvVariant.m_conectToIp;
    m_connectPort = g_EnvVariant.m_conectToPort;
    m_client = new QTcpSocket();
    m_client->connectToHost(m_conectIP,m_connectPort);
    connect(m_client,QTcpSocket::disconnected,this,QSYSendThread::ClientClosed,Qt::DirectConnection);
    connect(m_client,QTcpSocket::readyRead,this,QSYSendThread::ClientClosed,Qt::DirectConnection);
    if(m_client->state()==QAbstractSocket::ConnectedState)
    {
        cout<<"connnect to server fail !!! ";
    }
    else
    {
        cout<<"connnect to server successful !!! ";
    }
    m_pTimer = new QTimer();
    m_pTimer->start(2000);
    connect(m_pTimer,QTimer::timeout,this,QSYSendThread::TimeOut,Qt::DirectConnection);
    exec();
    delete m_client;
    delete m_pTimer;
}
void QSYSendThread::ClientClosed()
{
    cout<<"server is closed !!! ";
}
void QSYSendThread::ClientError(QAbstractSocket::SocketError /*socketError*/)
{

}
void QSYSendThread::TimeOut()
{

    if(m_client->state()==QAbstractSocket::UnconnectedState)
    {
        m_client->connectToHost(m_conectIP,m_connectPort);
        cout<<"connnect to server  !!! ";
    }
    cout<<"timeout!! ";
}