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void TcpServerWidget::on_startServerButton_clicked()//点击开启服务器按钮
{
server = new QTcpServer;
server->listen(QHostAddress::Any,51234);
connect(server,SIGNAL(newConnection()),this,SLOT(newConnectSlot()));
}
void TcpServerWidget::newConnectSlot()
{
socket = server->nextPendingConnection();
connect(socket,SIGNAL(readyRead()),this,SLOT(readMessageSlot()));
}