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while(sockClient->bytesAvailable()>0)
{
qDebug()<<"readBufferSize:"<<sockClient->readBufferSize();//结果为什么0?
memset(&msg,0,sizeof(msg));
sockClient->setSocketOption(QAbstractSocket::ReceiveBufferSizeSocketOption,1200);//这个没有任何作用
readByte=sockClient->read((char *)(&msg),sizeof(msg));
}