Which are free available good logging framework for cocoa environment? [duplicate]

Question

As of now I use NSLog for logging from my OS X application. But NSLog gives me no control over log level, size and number of log files. Other problem I face with NSLog is even though I redirect log statements to a file, I still see entries in System log (using console).

I found a logging framework log4cocoa, but this looks very old. Before making decision and start using log4cocoa, I want to know which all free logging frameworks are available for cocoa and merits / demerits of those.

Update: I also found one more logging framework called lumberjack. I am gonna try these two and see how they fair

Answer 1

OS X includes a built-in logging facility, the Apple System Logger (ASL). ASL supports multiple output streams, and logging levels.

Peter Hosey's series on the ASL is still the best introduction to the system and its API. The ASL API is in C, but it's quite easy to write an Objective-C wrapper and some preprocessor macros to make your life easier. The Google Toolbox for Mac has the GTMLogger class that supports flat-file, stdout, and ASL (via the GTMLogger+ASL category). If you don't mind taking an additional dependency, I would use GTM and its GTMLogger facilities.

Answer 2

Check Best Logger for cocoa answers too.