QFile QDataStream QTextStream

void get_buffer_split2(QByteArray readInArray,QList<QByteArray> &data,int buffer_size)
{

float t = buffer_size;
int num = ceil(float(readInArray.size())/float(t));

for(int i=1;i<=num;i++)
{
QByteArray _temp =  readInArray.left(buffer_size);
readInArray.remove(0,buffer_size);
data.push_back(_temp);
}
}

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QByteArray readArray;
QFile readFile("/home/gearslogy/icon.png");
if(!readFile.open(QFile::ReadOnly))
{
qDebug() << "error read file";
readFile.close();
return 2;
}
readArray = readFile.readAll();

QList<QByteArray> split_data;
get_buffer_split2(readArray,split_data,10);

QFile writeFile("/home/gearslogy/iconCopy.png");
if(!writeFile.open(QFile::WriteOnly))
{
qDebug() << "write file error";
writeFile.close();
return 0;
}

for(int i=0;i<split_data.size();i++)
{
QByteArray _temp = split_data[i];
writeFile.write(_temp);
}
writeFile.close();

return a.exec();
}