NoveLogger

A simple Swift logger using print in Debug and NSLog in Production.

Features

• Uses print in Debug and NSLog in Production.
• Format output in Debug and in Production.
• Supports log levels
• Contains the date, the log level, the file, the line and the function of the log’s call.
• Is unit tested.

Requirements

• iOS 9.0+
• Mac OS X 10.15+
• WatchOS 2.0+
• TV OS 9.0+

Installation

NoveLogger uses CocoaPods. It is a dependency manager for Cocoa projects.

To integrate NoveLogger into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
use_frameworks!

pod 'NoveLogger', '~> 1.0'

Then, run the following command:

$ pod install

Usage

Basics

Import NoveLogger first:

import NoveLogger

You have 3 ways to log:

// Using static functions (it will use the default logger)
NoveLogger.verbose("Your log message")

// Using the default logger
NoveLogger.defaultLogger.verbose("Your log message")

// Using an instanciated logger
let logger = NoveLogger()
logger.verbose("Your log message")

Here is an exemple of an output:

2019-12-02 15:25:41.031 [VERBOSE] [NoveLoggerTests.swift:42] testSimpleMessage(): Your log message

Log levels

NoveLogger allows 5 log levels:

NoveLogger.verbose("Verbose log.")
NoveLogger.debug("Debug log.")
NoveLogger.info("Info log.")
NoveLogger.warning("Warning log.")
NoveLogger.error("Error log.")

A log will not be outputted if its level is lower than the log level defined in the logger.

let logger = NoveLogger()
logger.logLevel = .info
logger.verbose("This message will not be printed.")
logger.error("This message will be printed.")

When you set the log level of your logger, you can set, from low to high:

.all // Everything will be printed.
.verbose
.debug
.info
.warning
.error
.off // Nothing will be printed.

By default, log levels are set as .all in Debug and .warning in Production.

You can override the default logger level by calling (for example):

NoveLogger.defaultLogger.logLevel = .debug

Format

You can use format to include contents into your log:

NoveLogger.verbose("Here is a message containing %d %@.", args: 2, "arguments")

> 2019-12-02 15:25:40.023 [VERBOSE] [NoveLoggerTests.swift:51] testFormat(): Here is a message containing 2 arguments.

Credits

Steve Gigou (Website, Twitter)

License

NoveLogger is available under the MIT license. See the LICENSE file for more informations.