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QPixmap pixmap("./images/airplane.png");
QByteArray bytes;
QBuffer buffer(&bytes);
buffer.open(QIODevice::WriteOnly);
pixmap.save(&buffer,"PNG");
qDebug()<<bytes;[code=c]
[/code]
QFile f(pFilePath);
QByteArray mFileData;
if (f.open(QIODevice::ReadOnly))
{
mFileData = f.readAll();
f.close();
}