06_QT网络编程之UDP通信
QT网络编程之UDP通信
udp编程
udp不分客户端和服务器,只需要使用一个类QUdpSocket。
代码
Udp.pro
#-------------------------------------------------
#
# Project created by QtCreator 2024-04-13T23:07:41
#
#-------------------------------------------------
QT += core gui network
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = Udp
TEMPLATE = app
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
main.cpp \
widget.cpp
HEADERS += \
widget.h
FORMS += \
widget.ui
widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QUdpSocket>
#include <QString>
#include <QMessageBox>
#include <QHostAddress>
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
QUdpSocket *udpSocket;
private slots:
void on_openBt_clicked();
void readyRead_slot();
void on_sendBt_clicked();
void on_closeBt_clicked();
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
widget.cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
udpSocket = new QUdpSocket(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_openBt_clicked()
{
bool flag;
flag = udpSocket->bind(ui->localPort->text().toUInt());
if(flag)
{
QMessageBox::information(this, "提示", "成功");
}else
{
QMessageBox::information(this, "提示", "失败");
}
connect(udpSocket, SIGNAL(readyRead()), this, SLOT(readyRead_slot()));
}
void Widget::readyRead_slot()
{
while (udpSocket->hasPendingDatagrams()) {
QByteArray array;
array.resize(udpSocket->pendingDatagramSize()); //将array调整到和udpsocket中没读完的数据一样大小
udpSocket->readDatagram(array.data(), array.size());
ui->receiveEdit->appendPlainText(array.data());
}
}
void Widget::on_sendBt_clicked()
{
QString buff;
QHostAddress address;
buff = ui->sendEdit->text();
address.setAddress(ui->targetIp->text());
udpSocket->writeDatagram(buff.toLocal8Bit().data(), buff.length(), address, ui->targetPort->text().toUInt());
}
void Widget::on_closeBt_clicked()
{
udpSocket->close();
}
widget.ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Widget</class>
<widget class="QWidget" name="Widget">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>451</width>
<height>481</height>
</rect>
</property>
<property name="windowTitle">
<string>Widget</string>
</property>
<layout class="QGridLayout" name="gridLayout">
<item row="0" column="0">
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QGroupBox" name="groupBox">
<property name="title">
<string>接收框</string>
</property>
</widget>
</item>
<item>
<widget class="QPlainTextEdit" name="receiveEdit">
<property name="readOnly">
<bool>true</bool>
</property>
</widget>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_2">
<item>
<widget class="QLabel" name="label">
<property name="text">
<string>本地端口:</string>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="localPort"/>
</item>
<item>
<widget class="QLabel" name="label_2">
<property name="text">
<string>目标端口:</string>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="targetPort"/>
</item>
</layout>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<widget class="QLabel" name="label_3">
<property name="text">
<string>目标IP:</string>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="targetIp"/>
</item>
</layout>
</item>
<item>
<widget class="QGroupBox" name="groupBox_2">
<property name="title">
<string>发送框</string>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="sendEdit"/>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QPushButton" name="openBt">
<property name="text">
<string>打开</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
<item>
<widget class="QPushButton" name="closeBt">
<property name="text">
<string>关闭</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_2">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
<item>
<widget class="QPushButton" name="sendBt">
<property name="text">
<string>发送</string>
</property>
</widget>
</item>
</layout>
</item>
</layout>
</item>
</layout>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources/>
<connections/>
</ui>