Ofstream MacOS gui app does not work question

MacOSX and iOS
1

Hi,

There is something i don’t get regarding standard C++ file streams on MacOS. Here’s some very basic standard C++ code that creates a file and writes something into it:

#include
#include

std::ofstream myfile;
myfile.open (“testing123.txt”);
myfile << “Hello file system.\n”;
myfile.close();

Now when i create a Console Application in the Producer and put this code in it works like a charm. However when i create a GUI Application in the Producer and put this code in, i don’t get an error but it just does not create a file…

I know that the JUCE file class works like a charm and i should use that instead ;-)hing Mac
I also suspect that this is not a JUCE issue but something MacOS related or so…

I just would like to understand what the problem is witch is why can i use std::ofstream in a Console app but not in a GUI app on MacOS… By the way on windows it works perfectly fine…

-Martijn-

PS: the inculdes are iostream and fstream but for some reason not displayed here…

2

Do you really specify the relative file path that you posted above? If so, the file might actually be written but somewhere you would‘t expect it. To which location such a file is relative is dependent of from where the executable has been invoked etc. so it‘s likely that a GUI app contained in an App Bundle behaves different to a command line application.
You should always use absolute paths and as you already mentioned, the File class can help you with that.

3

Thank you so much !!! I had no idea that one should always use absolute paths in a MacOS application… But now i do :wink:

What i still find a bit strange though is why:
This does work: myfile.open ("/Users/martijn/test123.txt");
But this does not: myfile.open ("~/test123.txt");

Cheers,
-Martijn-

4

I should think that ~ is something that BASH/ZSH etc. is expanding to /Users/martijn but the OS calls are not.

5

Allright than, absulute path’s they must be :wink:

-M-

6

Again, the File class helps you here:

auto filePath = File::getSpecialLocation (userHomeDirectory).getChildFile ("test123.txt");
myfile.open (filePath.getFullPathName.toRawUTF8());
1 Like
7

Yes it all makes sense now thanks again !!!

-M-