Qt网络应用----socket通信例子.doc

Qt网络应用----socket通信例子
Gui Application,工程名为“udpone”,work模块,Base class选择QMainWindow。(说明:如果一些Qt Creator版本没有添加模块一项,:QT += network)
(Text Edit),左边的那个的objectName改为为textSend,右边的那个的objectName改为textReceive,添加一个按钮,改其objectName为send,如下所示:
#include <work>,
添加public变量    QHostAddress *hostaddr1;和 QHostAddress *hostaddr2;
添加private变量  QUdpSocket *udpSocket1;和QUdpSocket *udpSocket2;
添加私有槽函数:
private slots:
       void send();
       void receive();
,加入如下代码:
(1)在构造函数中添加:
udpSocket1=new QUdpSocket(this);
    udpSocket2=new QUdpSocket(this);
    hostaddr1 = new QHostAddress("");
    hostaddr2 = new QHostAddress("");
    bool conn=udpSocket1->bind(*hostaddr1,6666,QUdpSocket::ShareAddress);//监听本机上的6666端口,如果有消息到来,就会发送readyRead()信号。
    if(!conn){
         QMessageBox box;
         (tr("连接错误"));
         ();
     }else{
         connect(udpSocket1,SIGNAL(readyRead()),this,SLOT(receive()));
         connect(ui->send,SIGNAL(clicked()),this,SLOT(send()));
     }
(2)实现send函数:
void MainWindow::send()
{
    QMessageBox box;
    QString text=ui->textSend->toPlainText();
    if(()==0){
        (tr("请输入发送内容"));
        ();
    }
   udpSocket2->writeDatagram((),(),*hostaddr