How do I redirect all errors, including uncaught exceptions, NSLog calls, and other logs, to a log file on Mac OS X?

Question

I am attempting to find a logging framework for a Cocoa application, written in ObjC.

What I\'ve attempted so far:

1. Use NSLog, but then realise that it

Answer 1

You can use the Foundation function NSSetUncaughtExceptionHandler to set a callback function that will handle all uncaught exceptions:

void CustomLogger(NSString *format, ...) {
   //do other awesome logging stuff here...
}

void uncaughtExceptionHandler(NSException *exception) {
   //do something useful, like this:
   CustomLogger(@"%@", [exception reason]);
}

NSSetUncaughtExceptionHandler(&uncaughtExceptionHandler);

For NSLog, you can use a macro to override it :)

#define NSLog(...) CustomLogger(__VA_ARGS__);