Qt: save QPixmap to std::vector<unsigned char> - or convert QByteArray to std::vector<unsigned char>

Question

I wanted to convert a QPixmap to std::vector . For now I am doing the following

     QPixmap pixmap;
     QByteArray bytes;
     QBuffer buffer(&bytes);
     buffer.open(QIODevice::WriteOnly);
     pixmap.save(&buffer, "JPG");

However I donot know how to convert QbyteArray to std::vector<unsigned char>

any suggestions ?

Answer 1

仅供记录，因为用户@ Lol4t0没有这样做：

 std::vector<unsigned char> c(bytes.constData(), bytes.constData() + bytes.size());