CocoaLumberjack Custom Log Formatter with time, log level, filename, line number, selector and message. The code `DDLogDebug(@"Enabled notification for status characteristic");` will write to the console: `12:19:13:539 V: DeviceConnector.m:101 bt_onConnected: | Enabled notification for status characteristic`

CustomLogFormatter.h

//
// Created by Ben Clayton on 23/12/14.
// Copyright (c) 2014 Calvium Ltd. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "DDLog.h"

@interface CustomLogFormatter : NSObject<DDLogFormatter>
@property(nonatomic, strong) NSRegularExpression *regex;

- (NSString *)formatLogMessage:(DDLogMessage *)logMessage;
@end

CustomLogFormatter.m

//
// Created by Ben Clayton on 23/12/14.
// Copyright (c) 2014 Calvium Ltd. All rights reserved.
//

#import "CustomLogFormatter.h"

@implementation CustomLogFormatter {
    NSDateFormatter *threadUnsafeDateFormatter;
    NSRegularExpression *_regex;
}

- (instancetype)init {
    self = [super init];
    if (self) {
        threadUnsafeDateFormatter = [[NSDateFormatter alloc] init];
        [threadUnsafeDateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
        [threadUnsafeDateFormatter setDateFormat:@"HH:mm:ss:SSS"];

        _regex = [NSRegularExpression regularExpressionWithPattern:@".?\\[.+? (.+?)\\]"
                                                           options:NSRegularExpressionCaseInsensitive
                                                             error:nil];
    }

    return self;
}

- (NSString *)formatLogMessage:(DDLogMessage *)logMessage {
    NSString *fileName = [logMessage->_file lastPathComponent];

    NSString *level;
    switch (logMessage->_level) {
        case DDLogLevelError:
            level = @"E:";
            break;
        case DDLogLevelWarning:
            level = @"W:";
            break;
        case DDLogLevelInfo:
            level = @"I:";
            break;
        case DDLogLevelDebug:
            level = @"D:";
            break;
        case DDLogLevelVerbose:
            level = @"V:";
            break;
        default:
            level = @"";
    }

    NSString *function = logMessage->_function;

    NSArray *array = [_regex matchesInString:function options:0 range:NSMakeRange(0, function.length)];
    if (array.count==1) {
        NSTextCheckingResult *res = array[0];
        if (res.numberOfRanges>1) {
            function = [function substringWithRange:[res rangeAtIndex:1]];
        }
    }

    return [NSString stringWithFormat:@"%@ %@ %@:%d %@ | %@",
                                      [threadUnsafeDateFormatter stringFromDate:(logMessage->_timestamp)],
                                      level,
                                      fileName,
                                      logMessage->_line,
                                      function,
                                      logMessage->_message];
}

@end

Usage.m

// E.g. in your applicationDidFinishLaunching...

DDTTYLogger *logger = [DDTTYLogger sharedInstance];
logger.logFormatter = [[CustomLogFormatter alloc] init];
[DDLog addLogger:logger];