QT serialization qdatastream

Communication data serialization of all platforms , Every language will encounter QT As a cross platform language , Comparison has also done a good job ;

QDataStream  to glance at API , Meeting <<  ,>>  Overloaded , You can format native data types , Such as QString int; 

    QDataStream::QDataStream(QIODevice * d)
    template <typename T>
    inline QDataStream & operator<<(QDataStream & s, const QList<T> & l)
    template <typename T>
    inline QDataStream & operator>>(QDataStream & s, QList<T> & l)

Use samples ：

write in ：

  QByteArray outBlock;
  
  QDataStream sendout(&outBlock,QIODevice::WriteOnly);

  int totalBytes = 30;
  QString type = "name";

     OffSetArray offset;
    offset.pt1 =0.1;
    offset.pt2 =0.2;
    offset.pt3 =0.3;
    offset.pt4 =0.4;

   QByteArray data;//=offset;
   data.append((char*)&offset,sizeof (OffSetArray));

  sendout<<totalBytes<<uchar(0)  <<type<<data;

 // read

  int total   ;
  QString name = "";
  QByteArray tmp;

   sendout>>totalBytes>>name>>tmp;
 
   OffSetArray *pTest = (OffSetArray*)tmp.data();

   QString str = QString("%1,%2,%3,%4").arg(pTest->pt1).arg(pTest->pt2).arg(pTest->pt3).arg(pTest->pt4);

  qDebug() << "pt  --"<<str;

Of course , It can be serialized directly , Structure , But it needs to be realized by yourself , I prefer to switch according to the type ;