Описание тега qbytearray
A QByteArray is a class from the Qt toolkit which provides an array of bytes.
QByteArray is meant to replace char * arrays. It can hold both raw bytes, and 8-bit null-terminated strings. QByteArray is initialized as easy as this:
QByteArray myArray("Hello, world!");
It also makes sure that the string is always null-terminated.
QByteArray supports indexed and iterator-based access, as well as it has methods like append() or prepend(), replace(), and other of the kind.
The official Qt documentation can be found here for Qt 4.8 and here for Qt 5.