032e1b0b83
Summary: Originally, `allowsBackgroundReloading` was added to improve performance, but ironically, it's causing lots of performance issues among other issues. * Performance: Looking back, it's not too surprising that it causes perf issues. We're falling back to a full `-reloadData` if the view is not in the window, which can happen pretty often. For example, if a view-controller is within a `UINavigationController` stack but not on top, or within a `UITabBarController`. Because a full `-reloadData` will re-query the cells and re-create the entire layout, it's going to be more expensive than an incremental update via `-performUpdatesAnimated`. The proof is in the data and we have a few examples where this flag was the cause of significant UI stalls. * Bugs: Because we might reload cells often, it can create strange animation artifacts. Specifically, it was breaking the `UIView` snapshots just before a transition, like the new zoom animator. Overall, we ended disabling this feature and I think most apps will be in the same boat. But what if this flag does improve my app's performance? * File an issue and lets chat! I'd be curious to understand why that's the case. If a full `-reloadData` is more performant than an incremental `-performUpdatesAnimated`, than something odd is happening and I don't think this flag is the right solution. Reviewed By: joetam Differential Revision: D25884777 fbshipit-source-id: c4626a52082ef4c7b7300b21077529f26c551e70 |
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| .github | ||
| docs | ||
| Examples | ||
| Guides | ||
| IGListKit.xcodeproj | ||
| IGListKit.xcworkspace | ||
| Pods | ||
| remodel-plugin | ||
| Resources | ||
| scripts | ||
| Source | ||
| Tests | ||
| .gitignore | ||
| .slather.yml | ||
| .travis.yml | ||
| CHANGELOG.md | ||
| CODE_OF_CONDUCT.md | ||
| Dangerfile | ||
| Gemfile | ||
| Gemfile.lock | ||
| IGListDiffKit.podspec | ||
| IGListKit.podspec | ||
| IGListSwiftKit.podspec | ||
| LICENSE.md | ||
| Package.swift | ||
| Podfile | ||
| Podfile.lock | ||
| README.md | ||
| README.zh.md | ||
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 master branch in the Instagram app.
Multilingual translation
Requirements
- Xcode 9.0+
- iOS 9.0+
- tvOS 9.0+
- macOS 10.11+ (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', '~> 4.0.0'
Carthage
For Carthage, add the following to your Cartfile:
github "Instagram/IGListKit" ~> 4.0.0
For advanced usage, see our Installation Guide.
Getting Started
$ git clone https://github.com/Instagram/IGListKit.git
$ cd IGListKit/
$ ./scripts/setup.sh
- Our Getting Started guide
- Ray Wenderlich's IGListKit Tutorial: Better UICollectionViews
- Our example projects
- Ryan Nystrom's talk at try! Swift NYC(Note: this talk was for an earlier version. Some APIs have changed.)
- Migrating an UITableView to IGListCollectionView, by Rodrigo Cavalcante
- Keeping data fresh in Buffer for iOS with AsyncDisplayKit, IGListKit & Pusher, Andy Yates, Buffer
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.