Hi,
I have a multithread application with 1 server and multiple client.

This is my QTCode:

Qt Code: 
  1. #ifndef MESSAGETHREAD_H
  2. #define MESSAGETHREAD_H
  3.  
  4. #include <QThread>
  5. #include <QTcpSocket>
  6. #include <QTcpServer>
  7.  
  8. class MessageThread : public QThread
  9. {
  10. 	Q_OBJECT
  11.  
  12. public:
  13. 	MessageThread();
  14.  
  15. 	void run();
  16.  
  17. 	public slots:
  18. 		void newMessConnection();
  19.  
  20. signals:
  21. 	void error(QTcpSocket::SocketError socketError);
  22.  
  23. private:
  24. 	QTcpServer* messageSrv;
  25. 	QString text;
  26. };
  27.  
  28. #endif
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Implementation:

Qt Code: 
  1. #include "MessageThread.h"
  2.  
  3. #include <QtNetwork>
  4.  
  5.  
  6. #define IPADDRESS "192.168.1.160"
  7.  
  8. MessageThread::MessageThread()
  9. {
  10. }
  11.  
  12. void MessageThread::run()
  13. {
  14. 	QTcpServer* messageServer = new QTcpServer;
  15. 	messageSrv = messageServer;
  16. 	connect(messageServer, SIGNAL(newConnection()), this, SLOT(newMessConnection()));
  17.  
  18. 	QHostAddress xIpAddress;
  19. 	quint16 port;
  20.  
  21. 	xIpAddress.setAddress(IPADDRESS);
  22. 	port = 2223;
  23.  
  24. 	if(!messageServer->listen(xIpAddress, port)) 
  25. 	{
  26. 		printf("\n Communication Manager.d: Unable to start the server.");
  27. 		messageServer->close();
  28. 	}
  29.  
  30. 	if (messageServer->isListening())
  31. 	{
  32. 		printf("\n Message Server initialized");
  33. 	}
  34. 	exec();
  35.  
  36.  
  37. }
  38.  
  39. void MessageThread::newMessConnection()
  40. {
  41. 	printf("\n Message server: send data....");
  42. 	QTcpSocket* connection = 	messageSrv->nextPendingConnection();
  43. 	QString test = "test data";
  44.  
  45. 	QByteArray block;
  46. 	QDataStream out(&block, QIODevice::WriteOnly);
  47. 	out.setVersion(QDataStream::Qt_4_0);
  48. 	out << (quint16)0;
  49. 	out << test;
  50. 	out.device()->seek(0);
  51. 	out << (quint16)(block.size() - sizeof(quint16));
  52. 	connection->write(block);
  53.  
  54. }
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When I create this thread the line "connection->write(block);" show me this error:

QObject: Cannot create children for a parent that is in a different thread.
Parent's thread is MessageThread, current thread is QThread.


How i can solve it?
Can anyone help me please?

Bye