# iwasrobbed/Objective-C-CheatSheet

A quick reference cheat sheet for common, high level topics in Objective-C.

Repository: https://github.com/iwasrobbed/Objective-C-CheatSheet
Canonical: https://ross.abutalabs.com/products/objective-c-cheatsheet
License Family: other
Topics: objective-c, ios, cheatcheat, cheatsheets
Last push: 2019-10-09T02:32:44+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4668, "days_push": 2521, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1361, forks 198 (observed 2026-08-28T04:04:30.111865+00:00)

## What it is
A quick-reference cheat sheet covering common, high-level Objective-C topics such as data types, classes, methods, properties, blocks, and common patterns. It is a documentation-style guide rather than software, aimed at developers who already know the basics.

## Use cases
- quickly look up Objective-C syntax for declaring classes and methods
- refresh memory on Objective-C blocks and literals
- review naming conventions and common Cocoa patterns
- find a concise reference for properties, variables, and error handling in Objective-C
- get a PDF reference of Objective-C essentials
- compare Objective-C basics before migrating to Swift

## When to choose
- you need a fast, concise reference for common Objective-C topics
- you are maintaining or reading legacy iOS or macOS Objective-C code
- you already know Objective-C basics and just need a refresher on syntax and patterns

## When to avoid
- you are a complete beginner learning Objective-C from scratch
- you are starting a new iOS project where Swift is the recommended language
- you need in-depth, up-to-date coverage of advanced Objective-C topics

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation
- domain: programming-languages, mobile-development, tutorials, developer-tools
- platform: -
- tags: objective-c, cheat-sheet, reference, ios-development, quick-reference, ios, macos

## Member repositories
- iwasrobbed/Objective-C-CheatSheet (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:30.111865+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:41:35.233166+00:00, confidence not recorded.
  - readme: https://github.com/iwasrobbed/Objective-C-CheatSheet (fetched 2026-08-28T04:04:30.111865+00:00, sha edca727b6202)
- Data as of 2026-08-30T08:39:29.467469+00:00.