CustomLogFormatter for CocoaLumberjack - Swift

CustomLogFormatter.swift

import Foundation
import CocoaLumberjack

class CustomLogFormatter : NSObject, DDLogFormatter
{
    private var dateFormatter : NSDateFormatter!

    override init()
    {
        self.dateFormatter = NSDateFormatter()
        self.dateFormatter.dateFormat = "yyyy/MM/dd HH:mm:ss:SSS"
    }

    func formatLogMessage(logMessage: DDLogMessage!) -> String!
    {
        var logLevel : String!
        switch (logMessage.flag)
        {
        case DDLogFlag.Error:
            logLevel = "Error"
        case DDLogFlag.Warning:
            logLevel = "Warning"
        case DDLogFlag.Info:
            logLevel = "Info"
        case DDLogFlag.Debug:
            logLevel = "Debug"
        case DDLogFlag.Verbose:
            logLevel = "Verbose"
        default:
            logLevel = "All"
        }

        let dateAndTime = self.dateFormatter.stringFromDate(logMessage.timestamp)
        let formattedString = String(format: "\(dateAndTime) [\(logLevel)] \(logMessage.function)(\(logMessage.line)): \(logMessage.message)")
        return formattedString
    }
}

A custom logger for CocoaLumberjack in the format

Date/Time [LogLevel] functionName(lineNumber): Message

e.g.
2015/08/11 16:01:37:227 [Verbose] foo(38): something happened

To use:

    let logger = DDTTYLogger.sharedInstance()
    logger.logFormatter = CustomLogFormatter()        
    DDLog.addLogger(logger)