Custom formatter for CocoaLumberjack to get XCGLogger (https://github.com/DaveWoodCom/XCGLogger) style log messages w/ log level, thread, file name, line #, & method name.

DTCustomFormatter.h

#import "DDLog.h"

@interface DTCustomFormatter : NSObject <DDLogFormatter>

@end

DTCustomFormatter.m

#import "DTCustomFormatter.h"

@implementation DTCustomFormatter

- (NSString *)formatLogMessage:(DDLogMessage *)logMessage {
  NSString *levelStr;
  
  switch (logMessage->_flag) {
    case DDLogFlagError:
      levelStr = @"Error";
      break;
    case DDLogFlagWarning:
      levelStr = @"Warning";
      break;
    case DDLogFlagInfo:
      levelStr = @"Info";
      break;
    case DDLogFlagDebug:
      levelStr = @"Debug";
      break;
    default:
      levelStr = @"Verbose";
      break;
  }
  
  // Ex: "[Debug] [13469294] [DTAppDelegate:15] -[DTAppDelegate application:didFinishLaunchingWithOptions:] > Application launched"
  return [NSString stringWithFormat:@"[%@] [%@] [%@:%lu] %@ > %@",
            levelStr,
            logMessage->_threadID,
            logMessage->_fileName,
            (unsigned long)logMessage->_line,
            logMessage->_function,
            logMessage->_message];
}

@end