實(shí)現(xiàn)效果

實(shí)現(xiàn)過(guò)程

準(zhǔn)備工作

在.pro中增加一句話

QT       +=network

繪制界面

.h文件內(nèi)容：

#ifndef WIDGET_H
#define WIDGET_H

#include "receivethread.h"
#include "sendthread.h"
#include <QWidget>
#include <QUdpSocket>
#include <iostream>
#include <stdint.h>
#include <sstream>
using namespace std;

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

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

public slots:
    //接收信號(hào)
    void receiveSlot();
    //停止線程
    void quitThreaSlot();

private slots:
    void on_pushButton_clicked();

    void on_pushButton_5_clicked();

    void on_pushButton_4_clicked();

private:
    Ui::Widget *ui;
    receiveThread*preceiveTHread;



private:
    QUdpSocket *m_udpSocket = nullptr;


};

#endif // WIDGET_H

構(gòu)造函數(shù)內(nèi)容

ui->setupUi(this);

    preceiveTHread = new receiveThread(this);

    //本地主機(jī)名
       QString hostName = QHostInfo::localHostName();

       //本機(jī)IP地址
       QHostInfo hostInfo = QHostInfo::fromName(hostName);

       //IP地址列表
       QList<QHostAddress> addrList = hostInfo.addresses();
       for(int i=0;i<addrList.count();i++)
       {
           QHostAddress host = addrList.at(i);

           if(QAbstractSocket::IPv4Protocol == host.protocol())
           {
               QString ip = host.toString();
               ui->comboBox->addItem(ip);
           }
       }

    m_udpSocket = new QUdpSocket(this);
    //連接信號(hào)和槽（綁定端口就開始接收信號(hào)線程，接收到數(shù)據(jù)就顯示，關(guān)閉窗口關(guān)閉線程）

    connect(this,SIGNAL(destroyed()),this,SLOT(quitThreaSlot()));
    connect(preceiveTHread,SIGNAL(receiveSignal()),this,SLOT(receiveSlot()));

對(duì)于綁定按鈕的定義函數(shù)：

void Widget::on_pushButton_clicked()
{
    //本機(jī)UDP端口
    qint16 port = ui->spinBox->value();

    if(m_udpSocket->bind(port))
    {
        ui->plainTextEdit->appendPlainText("**已成功綁定");
        ui->plainTextEdit->appendPlainText("**綁定端口: "+QString::number(m_udpSocket->localPort()));
        ui->pushButton->setEnabled(false);
    }
    else
    {
         ui->plainTextEdit->appendPlainText("**綁定失敗");
    }
    //啟動(dòng)線程

    preceiveTHread->start();
}

接收信號(hào)的槽函數(shù)（UDP接收到數(shù)據(jù)顯示）

void Widget::receiveSlot()
{
    ui->lineEdit->clear();
    //是否還有待讀取的傳入數(shù)據(jù)報(bào)
    while(m_udpSocket->hasPendingDatagrams())
    {
        QByteArray data;

        //返回待讀取的數(shù)據(jù)報(bào)的字節(jié)數(shù)
        data.resize(m_udpSocket->pendingDatagramSize());

        QHostAddress peerAddr;

        quint16 peerPort;

        //讀取數(shù)據(jù)報(bào)的內(nèi)容
        m_udpSocket->readDatagram(data.data(),data.size(),&peerAddr,&peerPort);



        QString str = data.data();

        QString peer = "[From ] +"+peerAddr.toString()+":"+QString::number(peerPort)+"] ";

        ui->lineEdit->setText(peer+str);

    }
}

quitThreaSlot函數(shù)：

void Widget::quitThreaSlot()
{
    preceiveTHread->quit();
    preceiveTHread->wait();
}

退出按鈕定義：

void Widget::on_pushButton_4_clicked()
{
    preceiveTHread->terminate();
}

使用的receivethread.h就是將run函數(shù)重寫（循環(huán)發(fā)送定義的信號(hào)延遲即可），在定義一個(gè)信號(hào)即可。
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