Unable to copy a file from one directory to another

[ejoshva]

#include "mainwindow.h"
#include <QApplication>
#include <QDir>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QDir qd;
    QFile srcfile;
    QFile destifile;
 
    QString dbsrcfilepath = "/Users/user/build-learnOn-Desktop_Qt_5_4_0_clang_64bit-Debug/learnOn.app/Contents/MacOS/learnOn1.sqlite";
    dbsrcfilepath = QDir::toNativeSeparators(dbsrcfilepath);
    destifile.setFileName(dbsrcfilepath);
    if(!(QDir("/Users/user/learnOnContent/").exists()))
        QDir().mkdir("/Users/user/learnOnContent/");
 
    QString dbdestinationfilepath = "/Users/user/learnOnContent/learnOn.sqlite";
    dbdestinationfilepath = QDir::toNativeSeparators(dbdestinationfilepath);
    srcfile.setFileName(dbdestinationfilepath);
 
    if(!srcfile.exists())
    {
        bool success = true;
        success &= destifile.open( QFile::ReadOnly );
        success &= srcfile.open( QFile::WriteOnly | QFile::Truncate );
 
        success &= srcfile.write( destifile.readAll() ) >= 0;
        destifile.close();
        srcfile.close();
    }
    else
    {
        srcfile.copy(dbdestinationfilepath);
    }
 
    return a.exec();
}

#include "mainwindow.h"
#include <QApplication>
#include <QDir>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QDir qd;
    QFile srcfile;
    QFile destifile;

    QString dbsrcfilepath = "/Users/user/build-learnOn-Desktop_Qt_5_4_0_clang_64bit-Debug/learnOn.app/Contents/MacOS/learnOn1.sqlite";
    dbsrcfilepath = QDir::toNativeSeparators(dbsrcfilepath);
    destifile.setFileName(dbsrcfilepath);
    if(!(QDir("/Users/user/learnOnContent/").exists()))
        QDir().mkdir("/Users/user/learnOnContent/");

    QString dbdestinationfilepath = "/Users/user/learnOnContent/learnOn.sqlite";
    dbdestinationfilepath = QDir::toNativeSeparators(dbdestinationfilepath);
    srcfile.setFileName(dbdestinationfilepath);

    if(!srcfile.exists())
    {
        bool success = true;
        success &= destifile.open( QFile::ReadOnly );
        success &= srcfile.open( QFile::WriteOnly | QFile::Truncate );

        success &= srcfile.write( destifile.readAll() ) >= 0;
        destifile.close();
        srcfile.close();
    }
    else
    {
        srcfile.copy(dbdestinationfilepath);
    }
    
    return a.exec();
}

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copying from dbsrcfilepath to dbdestinationfilepath