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Hi there! So it’s the future now (2023 to be precise) and the recommendations in this post aren’t valid anymore. I’d recommend you have a look at CocoaLumberjack instead of using the code here in anything you’re working on.
Have you ever found yourself needing to have your application record quite a bit of data? Think pushing it to the user’s console is messy? (it is!) Here’s your answer. In the main.m of your cocoa application, simply add the following imports:
#import <stdio.h.
#import <sys/param.h>
Then make your “main” method look like this:
int main(int argc, char *argv[])
{
id pool = [NSAutoreleasePool new];
NSString *applicationName = [NSString stringWithFormat: @"Library/Logs/%@.log", [[NSBundle mainBundle] objectForInfoDictionaryKey: @"CFBundleName"]];
NSString *logPath = [NSHomeDirectory() stringByAppendingPathComponent: applicationName];
freopen([logPath fileSystemRepresentation], "a", stderr);
[pool release];
return NSApplicationMain(argc, (const char **) argv);
}
Now, all of your logging messages will be pushed to a log file with the same name as your application under ~/Library/Logs/.