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[提问]关于一个TCP的通信问题 [复制链接]

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离线wizardxbl
新手上路
 
只看楼主 倒序阅读 楼主  发表于: 2011-02-20
先说一下需求：QT负责界面显示，LINUX C负责其他的事情，由C发数据给QT，然后QT做出显示。比如C发1，QT就显示个1。
问题：我不怎么会QT，参考C++ GUI QT4编程里面的TCP部分，写了个server的程序，然后用C写客户端，C这边提示能够建立连接，QT那边也进入到处理链接的函数了，可是，我不知道怎么把收到的数据显示出来，或者说不知道收到了什么数据。没有界面，我还不知道怎么加个label之类的进去……。下面贴出来QT的代码，希望各位大大，多多指教。
main.cpp
复制代码
  1. #include <QtGui/QApplication>
  2. #include "server.h"
  4. int main(int argc, char *argv[])
  5. {
  6.     QApplication app(argc, argv);
  7.     TripServer server;
  8.    if (!server.listen(QHostAddress::Any, 6178)) {
  9.         fprintf(stderr,"Failed to bind to port\n");
  10.         return 1;
  11.     }
  12.     //server.show();
  13.     return app.exec();
  14. }

server.h
复制代码
  1. #ifndef SERVER_H
  2. #define SERVER_H
  3. #include <QtGui/QWidget>
  4. #include <QTcpServer>
  5. #include <QTcpSocket>
  6. #include <QString>
  7. #include <QDate>
  8. class TripServer : public QTcpServer
  9. {
  10.     Q_OBJECT
  11. public:
  12.     TripServer(QObject *parent=0);
  13. private:
  14.     void incomingConnection(int socketId);
  15. };
  17. class ClientSocket : public QTcpSocket
  18. {
  19.     Q_OBJECT
  20. public:
  21.     ClientSocket(QObject *parent=0);
  22. private slots:
  23.     void readClient();
  24. private:
  25.     void generateRandomTrip(const QString &from, const QString &to, const QDate &date, const QTime &time);
  26.     quint16 nextBlockSize;
  27. };
  28. #endif // SERVER_H

server.cpp
复制代码
  1. #include "server.h"
  3. TripServer::TripServer(QObject *parent):QTcpServer(parent)
  4. {
  6. }
  8. void TripServer::incomingConnection(int socketId)
  9. {
  10.     ClientSocket *socket = new ClientSocket(this);
  11.     socket->setSocketDescriptor(socketId);
  12. }
  14. ClientSocket::ClientSocket(QObject *parent):QTcpSocket(parent)
  15. {
  16.     connect(this, SIGNAL(readyRead()),this,SLOT(readClient()));
  17.     connect(this,SIGNAL(disconnected()),this,SLOT(deleteLater()));
  19.     nextBlockSize = 1;
  20. }
  22. void ClientSocket::readClient()
  23. {
  24.     QDataStream in(this);
  25.     if (nextBlockSize==0) {
  26.         if(bytesAvailable()<sizeof(quint16)) {
  27.             fprintf(stderr,"-AAAA-");
  28.             return;
  29.         }
  30.         fprintf(stderr,"-BBBB-");
  31.         in >> nextBlockSize;
  32.     }
  33.     if (bytesAvailable()<nextBlockSize) {
  34.         fprintf(stderr,"-CCCC[%d]-",nextBlockSize);
  35.         return;
  36.     }
  37. fprintf(stderr,"-ABCD-");
  38.     quint8 requestType;
  39.     QString from;
  40.     QString to;
  41.     QDate date;
  42.     QTime time;
  43.     quint8 flag;
  44.     QString tmp1 = "a";
  45.     QString tmp2;
  46.     //in >> requestType;
  47.     in >> tmp2;
  49.     if (tmp2 == tmp1)
  50.         fprintf(stderr,"A!\n");
  52.     QByteArray tmp = tmp2.toLatin1();
  53.     fprintf(stderr,"[%s]\n",(const char *)tmp);
  54. /*
  55.     if (requestType == 'S') {
  56.             in >> from >> to >> date >> time >> flag;
  57.             //std::srand(from.length()*3600+to.length()*60+time.hour());
  58.             int numTrips = 5;//std::rand()%8;
  59.             for (int i = 0; i<numTrips; ++i) {
  60.                 generateRandomTrip(from,to,date,time);
  61.             }
  62.             QDataStream out(this);
  63.             out << quint16(0x41);
  64.     }
  65.   */
  66.     //close();
  67. }
  69. void ClientSocket::generateRandomTrip(const QString &, const QString &, const QDate &date, const QTime &time)
  70. {
  71.     QByteArray block;
  72.     QDataStream out(&block, QIODevice::WriteOnly);
  73.     out.setVersion(QDataStream::Qt_4_0);
  74.     quint16 duration = 5;//std::rand()%200;
  75.     out << quint16(0) << date << time << duration << quint8(1) << QString("InterCity");
  76.     out.device()->seek(0);
  77.     out << quint16(block.size()-sizeof(quint16));
  79.     write(block);
  80. }
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离线morriszy
侠客
只看该作者 1楼 发表于: 2011-02-21
增加一个MainWindow或者Widget呀！
VS2010+Qt4.7.0
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