Checking if a folder exists and creating folders in Qt C

Question

In Qt  how do I check if a given folder exists in the current directory  If it doesn t exist  how do I then create an empty folder

User · Answer

If you need an empty folder you can loop until you get an empty folder

    QString folder= QString ("%1").arg(QDateTime::currentMSecsSinceEpoch());
    while(QDir(folder).exists())
    {
         folder= QString ("%1").arg(QDateTime::currentMSecsSinceEpoch());
    }
    QDir().mkdir(folder);

This case you will get a folder name with a number .

User · Answer

Why use anything else     mkdir

User · Answer

To check if a directory named  Folder  exists use   QDir  Folder   exists      To create a new folder named  MyFolder  use   QDir   mkdir  MyFolder

User · Answer

To both check if it exists and create if it doesn t  including intermediaries   QDir dir  path to dir    if   dir exists        dir mkpath

User · Answer

When you use QDir mkpath   it returns true if the path already exists  in the other hand QDir mkdir   returns false if the path already exists  So depending on your program you have to choose which fits better   You can see more on Qt Documentation

[c++] Checking if a folder exists (and creating folders) in Qt, C++

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