Vincent Riemer
e532f861ec
Summary: Changelog: [iOS][Internal] - Fix ghost pointer leave/out events firing due to view recycling on iOS While implementing the properties on the PointerEvent object on iOS I noticed that in certain specific scenarios I was seeing pointerLeave events being fired seemingly without corresponding pointerEvent events and even more strangely, when the pointer wasn't even close to the view in question. After a lot of research I discovered that this was caused by an incompatibility between my strategy of keeping track/identifying views which are being hovered and RN's handling of creating/deleting views on iOS. See on iOS RN has the `RCTComponentViewRegistry` class which manages the creation & deletion of UIViews and adds an optimization of recycling views instead of outright deleting them. This is causing issues with my tracking of which views are hovered because I compare the view's object references which, while accurate towards confirming equality of an underlying UIView — isn't accurate in confirming the equality of views from react's perspective. This diff addresses this issue by adding a simple wrapper class that can be used around the UIViews which stores the view's react ID at initialization time ensuring it doesn't get updated even if the underlying view's react id is. As an additional precaution the wrapper class will also not return the view it's wrapping if their react tags do not match. Reviewed By: lunaleaps Differential Revision: D38546628 fbshipit-source-id: 8b732d52da0e61a5447001e8940e4439f49c6baf
React Native
Learn once, write anywhere:
Build mobile apps with React.
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React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.
- Declarative. React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug.
- Component-Based. Build encapsulated components that manage their state, then compose them to make complex UIs.
- Developer Velocity. See local changes in seconds. Changes to JavaScript code can be live reloaded without rebuilding the native app.
- Portability. Reuse code across iOS, Android, and other platforms.
React Native is developed and supported by many companies and individual core contributors. Find out more in our ecosystem overview.
Contents
- Requirements
- Building your first React Native app
- Documentation
- Upgrading
- How to Contribute
- Code of Conduct
- License
📋 Requirements
React Native apps may target iOS 12.4 and Android 5.0 (API 21) or newer. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS. Tools like Expo can be used to work around this.
🎉 Building your first React Native app
Follow the Getting Started guide. The recommended way to install React Native depends on your project. Here you can find short guides for the most common scenarios:
📖 Documentation
The full documentation for React Native can be found on our website.
The React Native documentation discusses components, APIs, and topics that are specific to React Native. For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.
The source for the React Native documentation and website is hosted on a separate repo, @facebook/react-native-website.
🚀 Upgrading
Upgrading to new versions of React Native may give you access to more APIs, views, developer tools, and other goodies. See the Upgrading Guide for instructions.
React Native releases are discussed in this discussion repo.
👏 How to Contribute
The main purpose of this repository is to continue evolving React Native core. We want to make contributing to this project as easy and transparent as possible, and we are grateful to the community for contributing bug fixes and improvements. Read below to learn how you can take part in improving React Native.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Contributing Guide
Read our Contributing Guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React Native.
Open Source Roadmap
You can learn more about our vision for React Native in the Roadmap.
Good First Issues
We have a list of good first issues that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.
Discussions
Larger discussions and proposals are discussed in @react-native-community/discussions-and-proposals.
📄 License
React Native is MIT licensed, as found in the LICENSE file.
React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.