[QT] 型態轉換

• const char * to QString
  
  const char *charstr = "charstring";
  QString qstring = QString(QLatin1String(charstr));


• Integer to QString
  
  int num = 10;
  QString qstring = QString::number(num,10);


• QString to const char *
  
  QString message = "test";
  char * c_message = message.toLatin1().data();


• QByteArray to unsigned char *
  
  QByteArray message;
  message.resize(5);
  message[0] = 0xFF;
  message[1] = 0xFE;
  unsigned char * c_message = (unsigned char *)message.data();