QT transfers the received JSON data (including Chinese) Unicode to utf8

Recently in use qt adopt json Data format transfer data , Receive from device to qt Interface data display , There's a problem , The specific reasons for this are still in place .cpu adopt json Transfer data information to qt End , Because the data information contains Chinese , Chinese characters will be converted by default unicode Format transfer , In this way qt End receiving and parsing json Data time , If the amount of data is too large , Will cause parsing json The data of failure , Cannot find corresponding string ( The exact reason is unknown , The judgment should be caused by this reason ), The amount of data is relatively small, and this problem does not occur for the time being .
The method to avoid this problem can transcode the received data , To utf8:

LocalSocket::instance()->recvMsg(msg);// Received data 
QTextCoder *code = QTextCodec::codevcForName("utf-8");
QByteArray msgUtf8 = code->fornUnicode(msg);// Transcoded data msgUtf8