Swift Logger

Log.swift

import Foundation

public class Log {
    private enum LogType: Int, CustomStringConvertible {
        public var description: String {
            switch self {
            case .verbose:
                return "[VERBOSE]"
            case .info:
                return "[INFO]"
            case .debug:
                return "[DEBUG]"
            case .warning:
                return "[WARNING]"
            case .error:
                return "[ERROR]"
            }
        }
        
        case verbose = 0
        case info = 1
        case debug = 2
        case warning = 3
        case error = 4
    }
    
    private static var formatter: DateFormatter = {
        let dateformatter = DateFormatter()
        dateformatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
        dateformatter.timeZone = TimeZone(abbreviation: "UTC")
        dateformatter.locale = Locale(identifier: "en_US_POSIX")
        return dateformatter
    }()
    
    
    private class func log(_ message: Any, type: LogType, file: String, line: UInt) {
        let log: String = "\(formatter.string(from: Date())) \(type.description) \(file.split(separator: "/").last ?? ""):\(line)  \(message)"
        print(log)
    }
    
    //MARK: Log functions
    public class func v(_ message: @autoclosure () -> Any, _ file: String = #file, _ line: UInt = #line) {
        log(message(), type: .verbose, file: file, line: line)
    }
    
    public class func i(_ message: @autoclosure () -> Any, _ file: String = #file, _ line: UInt = #line) {
        log(message(), type: .info, file: file, line: line)
    }
    
    public class func d(_ message: @autoclosure () -> Any, _ file: String = #file, _ line: UInt = #line) {
        log(message(), type: .debug, file: file, line: line)
    }
    
    public class func w(_ message: @autoclosure () -> Any, _ file: String = #file, _ line: UInt = #line) {
        log(message(), type: .warning, file: file, line: line)
    }
    
    public class func e(_ message: @autoclosure () -> Any, _ file: String = #file, _ line: UInt = #line) {
        log(message(), type: .error, file: file, line: line)
    }
}

Simple yet elegant swift logger.

Usage

Log.v(123)
Log.i("ABC")
Log.d("@$#!^%")
Log.w(Date())
Log.e([0.1,1,"A",Date()])

Example Log:

1990-02-19T22:45:36.250Z [VERBOSE] MyFile.swift:19 - 123
1991-03-20T20:33:44.777Z [INFO] MyFile.swift:20 - ABC
1992-04-21T09:53:51.021Z [DEBUG] MyFile.swift:21 - @$#!^%
1993-05-22T11:05:02.000Z [WARNING] MyFile.swift:22 - 2017-10-04 22:45:36 +0000
1994-06-23T15:13:00.146Z [ERROR] MyFile.swift:23 - [0.10000000000000001, 1, "A", 2017-10-04 09:55:36 +0000]

To use it. Simple compy content of this file into your project. Replace all your swift print() with Log and that's it!
You can modify this log class how you like. Change the print format, add condition for log hierarhy and more

For more advance Swift logger take a look in here:
SLLog