qt tcpsocket 传送结构体信息

#include "client.h" #include "ui_client.h" #include <QtNetwork> Client::Client(QWidget *parent) : QDialog(parent), ui(new Ui::Client) { ui->setupUi(this); tcpSocket = new QTcpSocket(this); connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readMessage()));//PC端在得到readyRead信号之后进行读取操作 connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError))); } Client::~Client() { delete ui; } void Client::newConnect() { // 初始化数据大小信息为0 nextBlockSize = 0; // 取消已有的连接 tcpSocket->abort(); ui->hostLineEdit->setText("127.0.0.1"); ui->portLineEdit->setText("8888"); tcpSocket->connectToHost(ui->hostLineEdit->text(),ui->portLineEdit->text().toInt()); } void Client::readMessage() { QDataStream in(tcpSocket); in.setVersion(QDataStream::Qt_4_3); forever{ if(nextBlockSize == 0){ if(tcpSocket->bytesAvailable()<sizeof(quint16)) break; in>>nextBlockSize; } if(nextBlockSize==0xFFFF){ break; } if(tcpSocket->bytesAvailable()<nextBlockSize) break; quint8 requestType; in>>requestType; if(requestType=='C') in>>message_rev.SN>>message_rev.IP>>message_rev.Condition; } qDebug()<<message_rev.SN<<message_rev.IP<<message_rev.Condition; ui->SN_lineEdit_2->setText(QString("%1").arg(message_rev.SN)); ui->IP_lineEdit->setText(message_rev.IP); ui->STATE_lineEdit_3->setText(message_rev.Condition); } void Client::displayError(QAbstractSocket::SocketError) { qDebug() << tcpSocket->errorString(); } // 连接按钮 void Client::on_connectButton_clicked() { newConnect(); }