A data-driven UICollectionView framework for building fast and flexible lists.
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Andrew Cuneo 30a1f16e61 Formalize that the IGListAdapterDelegateAnnouncer is main-thread affined
Summary:
Today, the IGListAdapterDelegateAnnouncer is different than most other announcers in IG/FB/etc in that it not thread safe to add and remove listeners.

However, this isn't really enforced, and has lead to people calling add / remove on background threads, which is creating crashes: https://fburl.com/logview/f1x4ytdl

A different way to deal with this problem is to make the IGListAdapterDelegateAnnouncer thread safe (eg D87806041), but the principle there seems to be that this class is only intended to be dealt with on the main threasd.

So, the fix here is to just make sure we call this on the thread and add asserts. using on_main here guarantees that we don't dispatch if we are already on the main thread, so it should be safe to add.

Reviewed By: manicakes

Differential Revision: D88427711

fbshipit-source-id: 41f352495e0238618e4d6efe938bdaed370bb139
2025-12-10 17:18:43 +09:00
.github Remove iOS 26.0 reference from the GitHub Actions manifest (#1643) 2025-12-10 17:18:43 +09:00
docs Fix 'veiw' mispelling 2025-12-10 17:18:42 +09:00
Examples Provided support for iOS 13 Context Menus (#1430) 2025-12-10 17:18:43 +09:00
Guides Improve SwiftPM support (#1546) 2025-12-10 17:18:09 +09:00
IGListKit.xcodeproj Fix the SPM build errors caused by removal of unprefixed headers (#1644) 2025-12-10 17:18:43 +09:00
remodel-plugin Standarize the copyright notice in all source files 2025-12-10 17:18:09 +09:00
Resources Add new dark/light mode compatible logo 2025-12-10 17:18:11 +09:00
scripts Remove privacy manifest file and related build tooling 2025-12-10 17:18:11 +09:00
Source Formalize that the IGListAdapterDelegateAnnouncer is main-thread affined 2025-12-10 17:18:43 +09:00
spm/Sources Fix missing project and SPM references (#1621) 2025-12-10 17:18:12 +09:00
Tests Provided support for iOS 13 Context Menus (#1430) 2025-12-10 17:18:43 +09:00
.gitignore Improve SwiftPM support (#1546) 2025-12-10 17:18:09 +09:00
.slather.yml Omit the test suite from code coverage stats 2025-12-10 17:18:10 +09:00
.swiftlint.yml Updated and reintegrated Danger into GitHub Actions CI 2025-12-10 17:18:09 +09:00
CHANGELOG.md Bump IGListKit to v5.1.0 2025-12-10 17:18:43 +09:00
CODE_OF_CONDUCT.md Adopt Contributor Covenant 2025-12-10 17:17:53 +09:00
Dangerfile Updated and reintegrated Danger into GitHub Actions CI 2025-12-10 17:18:09 +09:00
Gemfile Remove using CocoaPods to build IGListKit's test suite (#1641) 2025-12-10 17:18:43 +09:00
IGListDiffKit.podspec Remove privacy manifest file and related build tooling 2025-12-10 17:18:11 +09:00
IGListKit.podspec Remove privacy manifest file and related build tooling 2025-12-10 17:18:11 +09:00
IGListSwiftKit.podspec Remove privacy manifest file and related build tooling 2025-12-10 17:18:11 +09:00
LICENSE.md Standarize the copyright notice in all source files 2025-12-10 17:18:09 +09:00
Package.swift General fixes to restore GitHub CI (#1622) 2025-12-10 17:18:12 +09:00
README.md Bump IGListKit to v5.1.0 2025-12-10 17:18:43 +09:00
README.zh.md Bump IGListKit to v5.1.0 2025-12-10 17:18:43 +09:00

Build Status Coverage Status Pods Version Platforms Carthage Compatible


A data-driven UICollectionView framework for building fast and flexible lists.

Main Features
🙅 Never call performBatchUpdates(_:, completion:) or reloadData() again
🏠 Better architecture with reusable cells and components
🔠 Create collections with multiple data types
🔑 Decoupled diffing algorithm
Fully unit tested
🔍 Customize your diffing behavior for your models
📱 Simply UICollectionView at its core
🚀 Extendable API
🐦 Written in Objective-C with full Swift interop support

IGListKit is built and maintained with ❤️ by Instagram engineering. We use the open source version main branch in the Instagram app.

Multilingual translation

Chinese README

Requirements

  • Swift 5.1+
  • iOS 11.0+
  • tvOS 11.0+
  • macOS 10.13+ (diffing algorithm components only)
  • Interoperability with Swift 3.0+

Installation

CocoaPods

The preferred installation method is with CocoaPods. Add the following to your Podfile:

pod 'IGListKit', '~> 5.1.0'

Carthage

For Carthage, add the following to your Cartfile:

github "Instagram/IGListKit" ~> 5.1.0

Swift Package Manager

For Swift Package Manager:

To integrate using Xcode:

File -> Swift Packages -> Add Package Dependency

Enter package URL: https://github.com/Instagram/IGListKit, and select the latest release.

For advanced usage, see our Installation Guide.

Getting Started

Try out IGListKit by opening any of the sample apps available in the Examples directory.

Documentation

You can find the docs here. Documentation is generated with jazzy and hosted on GitHub-Pages.

To regenerate docs, run ./scripts/build_docs.sh from the root directory in the repo.

Vision

For the long-term goals and "vision" of IGListKit, please read our Vision doc.

Contributing

Please see the CONTRIBUTING file for how to help. At Instagram, we sync the open source version of IGListKit daily, so we're always testing the latest changes. But that requires all changes be thoroughly tested and follow our style guide.

We have a set of starter tasks that are great for beginners to jump in on and start contributing.

License

IGListKit is MIT-licensed.

The files in the /Examples/ directory are licensed under a separate license as specified in each file. Documentation is licensed CC-BY-4.0.

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