QT网络调试助手
- 1.开发流程
- 2.QTtcp服务器
-
- [ 1.1 服务端数据读取](# 1.1 服务端数据读取)
- [ 1.2 服务端发送数据-所有客户端](# 1.2 服务端发送数据-所有客户端)
- [ 1.3 服务端自动刷新ip地址](# 1.3 服务端自动刷新ip地址)
- [ 1.4 服务端检测客户端断开状态](# 1.4 服务端检测客户端断开状态)
- [ 1.5 服务端发送数据-指定特定客户端发送数据](# 1.5 服务端发送数据-指定特定客户端发送数据)
- [ 1.6 服务端停止监听和断开](# 1.6 服务端停止监听和断开)
- 3.QTtcp客户端
1.开发流程
2.QTtcp服务器
c
1.添加网络访问权限
QT += network
2.创建一个新对象
server = new QTcpServer(this);
3.当监听按钮按下后开始监听
void Widget::on_btnListen_clicked()
{
//2.监听:bool QTcpServer::listen(const QHostAddress &address = QHostAddress::Any, quint16 port = 0) 8888-15000
//QHostAddress addr("192.168.0.101");
port = ui->lineEditPort->text().toUInt();
if(!server->listen(QHostAddress(ui->comboBoxAddr->currentText()),port)){ //自动检测ip地址:QHostAddress::Any
QMessageBox msgBox;
msgBox.setWindowTitle("监听失败");
msgBox.setText("端口号被占用");
msgBox.exec();
return;
}
ui->btnListen->setEnabled(false);
ui->btnLineOut->setEnabled(true);
ui->btnStopListen->setEnabled(true);
ui->btnSend->setEnabled(true);
//qDebug() << QHostAddress(ui->comboBoxAddr->currentText());
}
4.监听到新的newConnection()信号后对新的连接进行处理
connect(server,SIGNAL(newConnection()),this,SLOT(on_newClient_connect()));
void Widget::on_newClient_connect()
{
//所有的数据操作都是TcpSocket进行
//bool QTcpServer::hasPendingConnections() const 有新的连接返回True
if(server->hasPendingConnections()){
//QTcpSocket *QTcpServer::nextPendingConnection() 返回下个连接来的connect
QTcpSocket *connection = server->nextPendingConnection(); //获得到的客户端连接信息都在connection里,并将信息也保存在server中
qDebug() << "client addr: " <<connection->peerAddress().toString() <<",port: " << connection->peerPort();
ui->textEditRev->insertPlainText("客户端地址:" + connection->peerAddress().toString()+
"\n客户端端口号:" + QString::number(connection->peerPort())+ "\n");
connect(connection,SIGNAL(readyRead()),this,SLOT(on_readyRead_handler()));
//断开后信号:void QAbstractSocket::disconnected()
//connect(connection,SIGNAL(disconnected()),this,SLOT(mdisconnected()));
//void QAbstractSocket::stateChanged(QAbstractSocket::SocketState socketState)
connect(connection,SIGNAL(stateChanged(QAbstractSocket::SocketState)),
this,SLOT(mstateChanged(QAbstractSocket::SocketState)));
ui->comboBoxChildren->addItem(QString::number(connection->peerPort()));
ui->comboBoxChildren->setCurrentText(QString::number(connection->peerPort()));
if(!ui->btnSend->isEnabled()){
ui->btnSend->setEnabled(true);
}
}
}
1.1 服务端数据读取
c
connect(connection,SIGNAL(readyRead()),this,SLOT(on_readyRead_handler());
void Widget::on_readyRead_handler()
{
QTcpSocket *tmpSocket = qobject_cast<QTcpSocket *>(sender()); //获得信号的发出者
QByteArray RevData = tmpSocket->readAll();
ui->textEditRev->insertPlainText("客户端:" + RevData + '\n');
ui->textEditRev->moveCursor(QTextCursor::End); //将读取光标移动至尾部
ui->textEditRev->ensureCursorVisible(); //确定光标可见
}
1.2 服务端发送数据-所有客户端
c
在on_newClient_connect()中
QTcpSocket *connection = server->nextPendingConnection(); 会将信息也保存在server中,server是全局变量,对server来说,每一个socket都是server的child
所以通过其父类QObject的FindChildren可以找到所有的socket
}
void Widget::on_btnSend_clicked()
{
//QTcpSocket *connection = server->nextPendingConnection(); //获得到的客户端连接信息都在connection里,并将信息也保存在server中
QList<QTcpSocket *> tcpSocketClients = server->findChildren<QTcpSocket *>();
for(QTcpSocket *tmp : tcpSocketClients){
//ui->textEditSend->toPlainText().toStdString().c_str()--先将QString转换成标准的c++字符串,再转换成const char*型
tmp->write(ui->textEditSend->toPlainText().toStdString().c_str());
}
}
1.3 服务端自动刷新ip地址
c
QNetworkInterface
QList<QHostAddress> QNetworkInterface::allAddresses()
//QList<QHostAddress> QNetworkInterface::allAddresses()
QList<QHostAddress> address = QNetworkInterface::allAddresses(); //获取地址
for(QHostAddress tmp : address){
if(tmp.protocol() == QAbstractSocket::IPv4Protocol) //将ipv4的地址刷入combox
ui->comboBoxAddr->addItem(tmp.toString());
}
1.4 服务端检测客户端断开状态
c
注:每次一断开之后必须清空通道即deleteLater();
否则server中会一直保留该通道
1.信号:void QAbstractSocket::disconnected()
connect(connection,SIGNAL(disconnected()),this,SLOT(mdisconnected()));
void Widget::mdisconnected()
{
QTcpSocket *tmpSocket = qobject_cast<QTcpSocket *>(sender()); //获得信号的发出者
qDebug() << "client Out";
ui->textEditRev->insertPlainText("客户端断开! ");
tmpSocket->deleteLater();
}
2.信号:void QAbstractSocket::stateChanged(QAbstractSocket::SocketState socketState)
void Widget::mstateChanged(QAbstractSocket::SocketState socketState)
{
QTcpSocket *tmpSocket = qobject_cast<QTcpSocket *>(sender()); //获得信号的发出者
switch(socketState){
case QAbstractSocket::ClosingState:
//case QAbstractSocket::UnconnectedState:
ui->textEditRev->insertPlainText("客户端断开! ");
tmpSocket->deleteLater();
break;
}
}
1.5 服务端发送数据-指定特定客户端发送数据
c
1.因为ComboBox不提供鼠标点击刷新事件,因此需要重写ComboBox的鼠标点击事件和信号
void MyComboBox::mousePressEvent(QMouseEvent *e)
{
if(e->button() == Qt::LeftButton){
emit ComboBox_clicked();
}
QComboBox::mousePressEvent(e);
}
2.将控件提升为MyComboBox,并绑定信号与槽
connect(ui->comboBoxChildren,&MyComboBox::ComboBox_clicked,this,&Widget::MyComboBox_refresh);
//刷新ComboBox控件内容---为ComboBox添加接入的端口
void Widget::MyComboBox_refresh()
{
ui->comboBoxChildren->clear();
QList<QTcpSocket *> tcpSocketClients = server->findChildren<QTcpSocket *>();
for(QTcpSocket *tmp : tcpSocketClients){
ui->comboBoxChildren->addItem(QString::number(tmp->peerPort()));
}
ui->comboBoxChildren->addItem("all");
}
2.重写发送
void Widget::on_btnSend_clicked()
{
//QTcpSocket *connection = server->nextPendingConnection(); //获得到的客户端连接信息都在connection里,并将信息也保存在server中
QList<QTcpSocket *> tcpSocketClients = server->findChildren<QTcpSocket *>();
if(tcpSocketClients.isEmpty()){
QMessageBox msg;
msg.setText("当前无连接");
msg.exec();
ui->btnSend->setEnabled(false);
return ;
}
if(ui->comboBoxChildren->currentText() != "all"){
QString currentname = ui->comboBoxChildren->currentText();
for(QTcpSocket *tmp :tcpSocketClients){
if(QString::number(tmp->peerPort()) == currentname){
tmp->write(ui->textEditSend->toPlainText().toStdString().c_str());
}
}
}else{
for(QTcpSocket *tmp : tcpSocketClients){
//ui->textEditSend->toPlainText().toStdString().c_str()--先将QString转换成标准的c++字符串,再转换成const char*型
tmp->write(ui->textEditSend->toPlainText().toStdString().c_str());
}
}
}
1.6 服务端停止监听和断开
c
void Widget::on_btnStopListen_clicked()
{
QList<QTcpSocket *> tcpSocketClients = server->findChildren<QTcpSocket *>();
for(QTcpSocket *tmp : tcpSocketClients){
tmp->close();
}
server->close();
ui->btnListen->setEnabled(true);
ui->btnLineOut->setEnabled(false);
ui->btnStopListen->setEnabled(false);
}
void Widget::on_btnLineOut_clicked()
{
on_btnStopListen_clicked();
delete server;
this->close();
}
3.QTtcp客户端
c
客户端逻辑相对简单直接上代码:
void Widget::on_pushButtonConnect_clicked()
{
//void connectToHost(const QHostAddress &address, quint16 port, QIODevice::OpenMode openMode = ReadWrite)
client->connectToHost(ui->lineEditIp->text(),ui->lineEditPort->text().toUInt()); //连接服务器
timer = new QTimer(this);
timer->setSingleShot(1);
timer->setInterval(5000);
connect(timer,SIGNAL(timeout()),this,SLOT(onTimerOut()));
connect(client,SIGNAL(connected()),this,SLOT(onConnected()));
//void QAbstractSocket::error(QAbstractSocket::SocketError socketError)
connect(client,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(onError(QAbstractSocket::SocketError)));
this->setEnabled(false);
timer->start();
}
void Widget::mread_data_from_server()
{
setInsertColor(Qt::black, "服务器:"+ client->readAll());
}
void Widget::on_btnSend_clicked()
{
QByteArray sendData = ui->textEditSend->toPlainText().toStdString().c_str();
client->write(sendData);
setInsertColor(Qt::red,"客户端:" + sendData);
}
void Widget::on_pushButtonOut_clicked()
{
client->close();
ui->textEditRev->append("断开连接\n");
ui->pushButtonConnect->setEnabled(true);
ui->lineEditIp->setEnabled(true);
ui->lineEditPort->setEnabled(true);
ui->pushButtonOut->setEnabled(false);
ui->btnSend->setEnabled(false);
}
void Widget::onConnected()
{
timer->stop();
this->setEnabled(true);
ui->textEditRev->insertPlainText("连接成功\n");
ui->pushButtonConnect->setEnabled(false);
ui->lineEditIp->setEnabled(false);
ui->lineEditPort->setEnabled(false);
ui->pushButtonOut->setEnabled(true);
ui->btnSend->setEnabled(true);
}
void Widget::onError(QAbstractSocket::SocketError error)
{
this->setEnabled(true);
on_pushButtonOut_clicked();
}
void Widget::onTimerOut()
{
ui->textEditRev->insertPlainText("连接超时!");
client->abort(); //放弃当前连接
this->setEnabled(true);
}
void Widget::setInsertColor(Qt::GlobalColor color, QString str)
{
QTextCursor cursor = ui->textEditRev->textCursor();
QTextCharFormat format;
QBrush brush(color);
format.setForeground(brush);
cursor.setCharFormat(format);
cursor.insertText(str+'\n');
ui->textEditRev->moveCursor(QTextCursor::End); //将光标移动至尾部
ui->textEditRev->ensureCursorVisible(); //确定光标可见
}
链接:https://pan.baidu.com/s/1uI_bhvufjcuW1R6CrR9P7g
提取码:3urt
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