Latest 1.0.0
License MIT
Platforms ios 8.0, requires ARC

Build Status

NOCLog is a very simple library that provides log output for debugging in Objective-C projects.

Xcode includes great debugging tools.
It mainly debugs using breakpoint and lldb, but sometimes debugging is done using console logs.

NOCLog is a very simple log output library, and you can use the log level to determine whether to outputs by log type.


You can install it using CocoaPods, the project dependency management tool using Objective-C and Swift.

Installation with CocoaPods

To inject a NOCLog dependency into your Xcode project using CocoaPods, add NOCLog in the Podfile.

source ''
platform :ios, '8.0'

target 'YourProjectName' do
pod 'NOCLog', '~> 0.1'

If you are already using a Podfile, you only need to add the NOCLog dependency.

pod 'NOCLog', '~> 0.1'

If the NOCLog dependency is added to the Podfile, execute the following command.

$ pod install


Whether to outputs the log is determined by log type(NOCLogType) and log level(NOCLogLevel).

Set the log level

1. Set the log level using macro definition

The log level can be specified using the LOGLEVEL macro definition.

#define LOGLEVEL 31
#import "NOCLog.h"


The LOGLEVEL macro must be defined before importing the header file of the NOCLog library.
Otherwise, it is set to the default value(NOCLogLevelWarn = 3).

2. Set the log level using preprocessor macro

You can set the log level by specifying the LOGLEVEL value at the Preprocessor Macro in the Project Setting of the Build Settings.


Set the log level using preprocessor macro

Using Preprocessor Macros is recommended because you can specify a separate log level for the Debug and Release environments.

Available the log levels

Log Level NOCLogLevel Explanation
0 NOCLogLevelOff Outputs no logs.
1 NOCLogLevelError Outputs only error logs.
3 NOCLogLevelWarn Outputs error and warning logs.
7 NOCLogLevelInfo Outputs error, warning and information logs.
15 NOCLogLevelDebug Outputs error, warning, information and debug logs.
31 NOCLogLevelVerbose Outputs all logs including detailed logs.

Log output macro functions

Macro Functions Log Type Explanation
NOCLogE NOCLogTypeError Used for error log output.
NOCLogW NOCLogTypeWarn Used for warning log output.
NOCLogI NOCLogTypeInfo Used for information log output.
NOCLogD NOCLogTypeDebug Used for debug log output to understand execution flow.
NOCLogV NOCLogTypeVerbose Used for log output for more information.


You can also refer to the demo app.

- (BOOL)application:(UIApplication *)application
  didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
            @"application  : ", application,
            @"launchOptions: ", launchOptions);

    NOCLogE(@"%@", @"Error Message!");
    NOCLogW(@"%@", @"Warning Message!");
    NOCLogI(@"%@", @"Information Message!");
    NOCLogV(@"%@", @"Verbose Message!");

    return YES;

If you add the log output code as above and run the app, it will be output to the console as below.

Sample log output

The above sample is when the log level(LOGLEVEL) is set to a value of 31 or more.

If the log level(LOGLEVEL) is not specified(default: 3), only logs using NOCLogE and NOCLogW will be output to the console.


NOCLog is released under the MIT license.
See LICENSE for details.

Latest podspec

    "name": "NOCLog",
    "version": "1.0.0",
    "summary": "NOCLog is a very simple library that provides a debug logs in an Objective-C projects.",
    "homepage": "",
    "license": {
        "type": "MIT",
        "file": "LICENSE"
    "authors": {
        "Jaeo Bok": "[email protected]"
    "social_media_url": "",
    "platforms": {
        "ios": "8.0"
    "requires_arc": true,
    "source": {
        "git": "",
        "tag": "1.0.0"
    "source_files": "NOCLog/*.{h,m}"

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