# krzysztofzablocki/PropertyMapper

Property mapping for Objective-C iOS apps.

Repository: https://github.com/krzysztofzablocki/PropertyMapper
Canonical: https://ross.abutalabs.com/products/propertymapper
Homepage: http://merowing.info
Language: Objective-C
License: MIT
License Family: permissive
Last push: 2021-01-06T15:38:40+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4788, "days_push": 2065, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1119, forks 80 (observed 2026-08-28T04:03:39.355561+00:00)

## What it is
A lightweight Objective-C library for iOS that maps values from NSDictionary/NSArray data into object properties, handling NSNull, optional params, type conversions, and validation. It is a self-contained alternative to heavier mapping frameworks like Mantle or RestKit.

## Use cases
- map server JSON responses to model properties in iOS apps
- parse dictionaries into Objective-C objects without repetitive boilerplate
- convert string values to typed properties like NSURL
- safely handle NSNull and optional fields when parsing API data
- validate and type-box data during model mapping
- extract nested values from dictionaries into flat object properties

## When to choose
- you maintain an Objective-C iOS codebase and want minimal, self-contained data mapping
- you find Mantle or RestKit too heavy and want something easy to remove
- you need simple type boxing and validation while parsing dictionaries

## When to avoid
- you are building a new Swift project, where Codable is the standard
- you need full JSON-to-model mapping directly from raw JSON rather than native collections
- you need an actively developed library with ongoing updates

## Facets
- artifact type: library
- maturity: maintenance
- function: serialization, sdk
- domain: mobile-development, apis
- platform: -
- tags: objective-c, data-mapping, -parsing, cocoapods, type-boxing, validation, ios, mobile

## Member repositories
- krzysztofzablocki/PropertyMapper (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:39.355561+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 2026-08-30T06:41:12.292708+00:00, confidence not recorded.
  - readme: https://github.com/krzysztofzablocki/PropertyMapper (fetched 2026-08-28T04:03:39.355561+00:00, sha 85836d1a0ec2)
  - homepage: http://merowing.info (fetched 2026-08-29T12:45:07.191357+00:00, sha 61f3f84527cc)
  - site_page: https://merowing.info/about (fetched 2026-08-29T12:45:07.200545+00:00, sha 169bfe72ef06)
  - site_page: https://merowing.info/posts/eval-loops-for-llm-features (fetched 2026-08-29T12:45:07.202931+00:00, sha b28398939c2f)
- Data as of 2026-08-30T08:39:29.467469+00:00.