How to extract a resource from qrc (Solved)

fronald

Hi,

I need extract 1 file on first run of my desktop application. My resource is in a qrc.

How do it?

Thanks.

pkj__

QFile::copy(":/path/to/qrc", "path/to/copy");
copies the file from qrc to directory you specify. You can use other methods of QFile to load the file in memory.

lgeyer

Resources are completely transparent to the application and they might be treated as regular files, for example for copying (see previous post). The only restriction is that they are read-only, both the files itself (you cannot modify them) and the directory strucuture they are contained in (you cannot add or remove files to or from a resource collection).

fronald

Qt is wonderful -

My simple question have a simple answer.

Thanks!

thanhxp

@pkj__
I did as you said but I cannot write a QT resource file to a directory-structure-path.
Here is my code:

#include <QCoreApplication>
#include <QFile>
#include <QString>
#include <QDebug>
#include <QTextStream>
#include <iostream>

using namespace std;

void read(QString filename)
{
    QFile file(filename);
    if(!file.open(QFile::ReadOnly |
                  QFile::Text))
    {
        qDebug() << " Could not open the file for reading";
        return;
    }

    QTextStream in(&file);
    QString myText = in.readAll();

    // put QString into qDebug stream
    qDebug() << myText;

    file.close();
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    read(":/resources/hello.pro");
    bool status = QFile::copy(":/resources/hello.pro" , "~/abc/hel.pro");
    if(status) {
            cout << "Success" << endl;
        } else {
            cout << "Failed" << endl;
        }


    return 0;
}

Could you help me why I am getting Failed. I am expecting that I will create a new folder named abc inside the current directory and copy the resource file into that.
Thank and best regards.

Thanh C. Tran

mrjj

@thanhxp
Hi
Copy will not make a new folder
You must do that yourself
QDir().mkdir("~/abc");

Update:
https://forum.qt.io/topic/72915/copy-qt-resource-file-into-filesystem/2

thanhxp

@mrjj
Thanks, problem solved.
Best regards,
Thanh C. Tran