首先在工程文件.pro中加入
QT += network
需要加的头文件
#include
#include
服务端
1.创建初始化对象
mServer = new QTcpServer();
mSocket = new QTcpSocket();
2.关联客户端
connect(mServer,SIGNAL(newConnection()),this,SLOT(new_client()));
3.启动监听服务
mServer->listen(QHostAddress::Any,1122);
4.接受数据
mSocket = mServer->nextPendingConnection();//与客户端通信的套接字
connect(mSocket,SIGNAL(readyRead()),this,SLOT(read_client_data()));
5.发送数据
mSocket->write((char*)msg,5);
实现代码
tcpServer::tcpServer(QWidget *parent) :
QDialog(parent),
ui(new Ui::tcpServer)
{
ui->setupUi(this);
mServer = new QTcpServer();
//关联客户端连接信号newConnection
connect(mServer,SIGNAL(newConnection()),this,SLOT(new_client())); //连接客户端
//启动服务器监听
mServer->listen(QHostAddress::Any,1122);
}
tcpServer::~tcpServer()
{
delete ui;
}
void tcpServer::new_client()
{
mSocket = mServer->nextPendingConnection();//与客户端通信的套接字
//关联接收客户端数据信号readyRead信号(客户端有数据就会发readyRead信号)
connect(mSocket,SIGNAL(readyRead()),this,SLOT(read_client_data()));
}
void tcpServer::read_client_data()
{
//可以实现同时读取多个客户端发送过来的消息
QTcpSocket *obj = (QTcpSocket*)sender();
QByteArray msg = obj->readAll();
unsigned short size = msg.size();
unsigned char msg1[10] = {0};
memcpy(msg1, msg.data(), size);
qDebug()<
}
void tcpServer::on_pushButton_clicked()
{
unsigned char msg[10];
msg[0]=‘*‘;
msg[1]=10;
msg[2]=30;
msg[4]=1;
mSocket->write((char*)msg,5);
}
客户端
1.创建初始化
mSocket = new QTcpSocket();
2.连接服务器，设置IP和端口
mSocket->connectToHost(QHostAddress::LocalHost,1122);
3.接收数据
connect(mSocket,SIGNAL(readyRead()),this,SLOT(read_data()));
QByteArray msg = mSocket->readAll();
4.发送数据
mSocket->write((char*)msg,5);
实现代码
tcpClick::tcpClick(QWidget *parent) :
QWidget(parent),
ui(new Ui::tcpClick)
{
ui->setupUi(this);
mSocket = new QTcpSocket();
//关联数据信号
connect(mSocket,SIGNAL(readyRead()),this,SLOT(read_data()));
//连接服务器，设置ip和端口号
mSocket->connectToHost(QHostAddress::LocalHost,9988);
}
tcpClick::~tcpClick()
{
delete ui;
}
void tcpClick::read_data()
{
QByteArray msg = mSocket->readAll();
unsigned short size = msg.size();
unsigned char msg1[10] = {0};
memcpy(msg1, msg.data(), size);
qDebug()<
}
void tcpClick::on_pushButton_clicked()
{
unsigned char msg[10];
msg[0]=‘*‘;
msg[1]=30;
msg[2]=20;
msg[4]=11;
mSocket->write((char*)msg,5);
}