# kishikawakatsumi/IBPCollectionViewCompositionalLayout

Backport of UICollectionViewCompositionalLayout to earlier iOS 12

Repository: https://github.com/kishikawakatsumi/IBPCollectionViewCompositionalLayout
Canonical: https://ross.abutalabs.com/products/ibpcollectionviewcompositionallayout
Language: Swift
License: MIT
License Family: permissive
Topics: uicollectionviewlayout, compositional-layouts, uikit, backport
Last push: 2022-04-25T18:42:31+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2584, "days_push": 1591, "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 1553, forks 149 (observed 2026-08-28T04:05:02.892267+00:00)

## What it is
A Swift/Objective-C library that backports UICollectionViewCompositionalLayout from iOS 13 to iOS 12 and earlier. It lets developers use Apple's compositional collection view layout APIs without maintaining separate codebases for older iOS versions.

## Use cases
- use compositional layout on iOS 12
- backport UICollectionViewCompositionalLayout to older iOS
- create complex collection view layouts without custom UICollectionViewLayout subclasses
- avoid maintaining two codebases for iOS 12 and iOS 13
- build nested collection views with independently scrolling sections

## When to choose
- you must support iOS 12 or earlier but want modern compositional layout APIs
- you want declarative collection view layouts without subclassing UICollectionViewLayout
- your app targets users on older iOS versions during a transition period

## When to avoid
- your minimum deployment target is iOS 13 or later (use the native API)
- the project needs actively maintained dependencies (last release 2022)
- you use SwiftUI collection views instead of UIKit

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components, developer-tools
- domain: mobile-development, cross-platform
- platform: -
- tags: uikit, uicollectionviewlayout, compositional-layout, backport, cocoapods, spm, ios, swift, mobile

## Member repositories
- kishikawakatsumi/IBPCollectionViewCompositionalLayout (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:02.892267+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 2026-08-30T04:30:09.234948+00:00, confidence not recorded.
  - readme: https://github.com/kishikawakatsumi/IBPCollectionViewCompositionalLayout (fetched 2026-08-28T04:05:02.892267+00:00, sha d6f1b57e4669)
- Data as of 2026-08-30T08:39:29.467469+00:00.