A little trick

Question

rogerkjode OP

Created Jul ’24

Replies 2

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I had a problem that my app did not work outside Xcode (had to include the metalkit.framework

I found a simple trick to get my NSLog outputs and locate the issue:

NSURL *downloadsDirectory = [[[NSFileManager defaultManager] URLsForDirectory:NSDownloadsDirectory inDomains:NSUserDomainMask] firstObject];

NSURL *fileURL = [downloadsDirectory URLByAppendingPathComponent:@"Log.txt"];

NSString *filePath = [fileURL path];
    
    // Redirect stderr to the file
   freopen([filePath fileSystemRepresentation], "a+", stderr);

Now you get debug info in your Download folder!

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Answer 1

DTS Engineer OP

Apple

Jul ’24

Thanks for sharing!

An alternative way to do this, one that doesn’t require code changes, is to run your app from Terminal. I give an example of this, albeit towards a different goal, in the App Can’t Be Opened section of Resolving Trusted Execution Problems.

Share and Enjoy
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Answer 2

rogerkjode OP

Jul ’24

This was of course the first thing I attempted, but got no output.

Roger Kjøde

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