How to read from QFile? It shows that file not accessible - c++

Question

I've been trying to read .xml file using QFile. But qt creator can't even find it, but file exists inside project (also I tried to read it from another directory, not project's, it doesn't work, too). Debuger says file not accessible.
Here's my code:
QFile file("../info.xml");
if (file.exists())
if (file.open(QFile::ReadOnly | QFile::Text))
qDebug(qPrintable("File exist"));

Answer 1

This is not a complete answer, but rather a list of what may have gone wrong.
Check the file path :
QFileInfo inf (file);
qDebug() << inf.QFileInfo::path();
Ensure that the file is in the right directory, i.e. in the same you have your .exe (build-ProjectName-...). You can check this by using QDir::currentPath()
Check which if causes the problem : is it the first one which checks file existence or the second one that cannot open it ?
I am not sure it is a good idea to use the QFile::Text for .xml files.
In the end, I would do something like this :
QFile file("../info.xml");
QFileInfo inf (file);
qDebug() << "File path : "<< inf.QFileInfo::path() << Qt::endl;
qDebug() << "Current path : " << QDir::currentPath() << Qt::endl;
qDebug() << "Current path (expected) : " << QDir::currentPath() + "/info.xml" << Qt::endl;
if (file.exists()){
qDebug() << "exists" << Qt::endl;
if (file.open(QFile::ReadOnly)){qDebug() << "opened";}
}