Qt学习笔记(2)：Udp局域网通信
17 Oct 2011</embed>
和朋友准备做一个手机控制灯光的开关这么一个小东西。
用到Qt写N8的程序，现处于初级阶段，以此文留念。
Sender：
.cpp
01 #include “widget.h”
02 #include “ui_widget.h”
03
04 Widget::Widget(QWidget *parent) :
05 QWidget(parent),
06 ui(new Ui::Widget)
07 {
08 ui->setupUi(this);
09 sender=new QUdpSocket(this);
10 }
11
12 Widget::~Widget()
13 {
14 delete ui;
15 }
16 void Widget::on_pushButton_clicked()
17 {
18 QByteArray datagram =“ON!”;
19 sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress(ui->lineEdit->text()),45454);
20 }
21 void Widget::on_pushButton_2_clicked()
22 {
23 QByteArray datagram =“OFF!”;
24 sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress(ui->lineEdit->text()),45454);
25 }
02 #include “ui_widget.h”
03
04 Widget::Widget(QWidget *parent) :
05 QWidget(parent),
06 ui(new Ui::Widget)
07 {
08 ui->setupUi(this);
09 sender=new QUdpSocket(this);
10 }
11
12 Widget::~Widget()
13 {
14 delete ui;
15 }
16 void Widget::on_pushButton_clicked()
17 {
18 QByteArray datagram =“ON!”;
19 sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress(ui->lineEdit->text()),45454);
20 }
21 void Widget::on_pushButton_2_clicked()
22 {
23 QByteArray datagram =“OFF!”;
24 sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress(ui->lineEdit->text()),45454);
25 }
.h
C++语言: Codee#23278
01 #ifndef WIDGET_H
02 #define WIDGET_H
03
04 #include</span>
05 #include</span>
06 namespace Ui {
07 class Widget;
08 }
09
10 class Widget : public QWidget
11 {
12 Q_OBJECT
13
14 public:
15 explicit Widget(QWidget *parent = );
16 ~Widget();
17 private slots:
18 void on_pushButton_clicked();
19 void on_pushButton_2_clicked();
20 private:
21 Ui::Widget *ui;
22 QUdpSocket *sender;
23 };
24
25 #endif // WIDGET_H </div> Receiver .cpp
02 #define WIDGET_H
03
04 #include
05 #include
06 namespace Ui {
07 class Widget;
08 }
09
10 class Widget : public QWidget
11 {
12 Q_OBJECT
13
14 public:
15 explicit Widget(QWidget *parent = );
16 ~Widget();
17 private slots:
18 void on_pushButton_clicked();
19 void on_pushButton_2_clicked();
20 private:
21 Ui::Widget *ui;
22 QUdpSocket *sender;
23 };
24
25 #endif // WIDGET_H </div> Receiver .cpp
01 #include “widget.h”
02 #include “ui_widget.h”
03
04 Widget::Widget(QWidget *parent) :
05 QWidget(parent),
06 ui(new Ui::Widget)
07 {
08 ui->setupUi(this);
09 receiver=new QUdpSocket(this);
10 receiver->bind(45454,QUdpSocket::ShareAddress);
11 connect(receiver,SIGNAL(readyRead()),this,SLOT(processPendingDatagram()));
12 }
13
14 Widget::~Widget()
15 {
16 delete ui;
17 }
18 void Widget::processPendingDatagram()
19 {
20 while(receiver->hasPendingDatagrams())
21 {
22 QByteArray datagram;
23 datagram.resize(receiver->pendingDatagramSize());
24 receiver->readDatagram(datagram.data(),datagram.size());
25 ui->label->setText(datagram);
26
27 }
28 }
.h
02 #include “ui_widget.h”
03
04 Widget::Widget(QWidget *parent) :
05 QWidget(parent),
06 ui(new Ui::Widget)
07 {
08 ui->setupUi(this);
09 receiver=new QUdpSocket(this);
10 receiver->bind(45454,QUdpSocket::ShareAddress);
11 connect(receiver,SIGNAL(readyRead()),this,SLOT(processPendingDatagram()));
12 }
13
14 Widget::~Widget()
15 {
16 delete ui;
17 }
18 void Widget::processPendingDatagram()
19 {
20 while(receiver->hasPendingDatagrams())
21 {
22 QByteArray datagram;
23 datagram.resize(receiver->pendingDatagramSize());
24 receiver->readDatagram(datagram.data(),datagram.size());
25 ui->label->setText(datagram);
26
27 }
28 }
01 #ifndef WIDGET_H
02 #define WIDGET_H
03
04 #include</span>
05 #include</span>
06 namespace Ui {
07 class Widget;
08 }
09
10 class Widget : public QWidget
11 {
12 Q_OBJECT
13
14 public:
15 explicit Widget(QWidget *parent = );
16 ~Widget();
17 private slots:
18 void processPendingDatagram();
19 private:
20 Ui::Widget *ui;
21 QUdpSocket *receiver;
22 };
23
24 #endif // WIDGET_H </div> 下载源码 转载请注明：[于哲的博客][1] » [Qt学习笔记(2)：Udp局域网通信][2] [1]: http://lazynight.me [2]: http://lazynight.me/542.html
02 #define WIDGET_H
03
04 #include
05 #include
06 namespace Ui {
07 class Widget;
08 }
09
10 class Widget : public QWidget
11 {
12 Q_OBJECT
13
14 public:
15 explicit Widget(QWidget *parent = );
16 ~Widget();
17 private slots:
18 void processPendingDatagram();
19 private:
20 Ui::Widget *ui;
21 QUdpSocket *receiver;
22 };
23
24 #endif // WIDGET_H </div> 下载源码 转载请注明：[于哲的博客][1] » [Qt学习笔记(2)：Udp局域网通信][2] [1]: http://lazynight.me [2]: http://lazynight.me/542.html