react / react/react-native

`onPress` not working while animating views

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まだ誰も着手していません。

Issue: Author Provided Repro Resolution: PR Submitted Type: New Architecture
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説明

Description

Historically there have been issues with Pressability on the new arch:

There was a specific fix for the Animated API where we on animation end make a state update to actually re-render the component with the latest animated value to sync back to the shadow tree:

While this fix works on animation end it doesn't work for running animations.

In these recordings you can see how the onPress is fired while animating while on new arch its not, so its a regression:

Old Arch New Arch
Works on every press during animation: Doesn't work:

Now, this problem isn't exactly just limited to RNs Animated API. There are examples from other libraries, for example reanimated. They don't sync the values back on the JS thread yet in any way once an animation is done. Now we could blame reanimated for it and ask them to fix it, but ultimately it would suffer the same problem as RNs Animated API that it will be broken during animation. Issues for reference:

Potential solutions

One solution is to switch the native implementation for the measure function back to how it's working on paper: measuring on the native view hierarchy.

This way when a touch gets dispatched on the native side and we calculate the area of the view, we know 100% for sure that it will be accurately the same to what we have on the screen right now:

In a lot of those issues it's recommended to switch to use Pressable from react-native-gesture-handler. This works because RNGH also uses the native view hierarchy to figure out where things are.

We might either want to fully switch measure and measureInWindow or create separate methods like measureNative and use those for press-ability (or just add a param like measureOnUI)?

The only downside I can see is that measureNative would be async. That would be fine for the pressability use case but I am not sure if thats causing issues in other places for Meta? Right now measure is also async by callback although it could become sync as far as I can see.

Another solution might be to still commit those updates to the shadow tree but ask to not mount the updates?

Steps to reproduce
  1. Get the reproducer
  2. yarn install
  3. yarn android
  4. Try pressing on the blue area
  5. (In gradle.proeprties turn off new arch and test again, notice how its working)
React Native Version

0.79.2

Affected Platforms

Runtime - Android, Runtime - iOS

Areas

Fabric - The New Renderer

Output of npx @react-native-community/cli info
System:
  OS: macOS 15.3.1
  CPU: (12) arm64 Apple M2 Pro
  Memory: 83.97 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.18.1
    path: ~/.nvm/versions/node/v20.18.1/bin/node
  Yarn:
    version: 1.22.19
    path: ~/.nix-profile/bin/yarn
  npm:
    version: 10.8.2
    path: ~/.nvm/versions/node/v20.18.1/bin/npm
  Watchman:
    version: 2024.03.11.00
    path: /Users/hannomargelo/.nix-profile/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /Users/hannomargelo/.rbenv/shims/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.2
      - iOS 18.2
      - macOS 15.2
      - tvOS 18.2
      - visionOS 2.2
      - watchOS 11.2
  Android SDK:
    API Levels:
      - "28"
      - "30"
      - "31"
      - "32"
      - "33"
      - "33"
      - "34"
      - "35"
    Build Tools:
      - 28.0.3
      - 30.0.2
      - 30.0.3
      - 31.0.0
      - 33.0.0
      - 33.0.1
      - 33.0.2
      - 34.0.0
      - 35.0.0
      - 35.0.1
      - 36.0.0
    System Images:
      - android-33 | Google Play ARM 64 v8a
      - android-34 | Google APIs ARM 64 v8a
      - android-34 | Google APIs ATD ARM 64
    Android NDK: 27.1.12297006
IDEs:
  Android Studio: 2024.3 AI-243.24978.46.2431.13208083
  Xcode:
    version: 16.2/16C5032a
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.7
    path: /Users/hannomargelo/.jenv/shims/javac
  Ruby:
    version: 3.3.4
    path: /Users/hannomargelo/.rbenv/shims/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 18.0.0
    wanted: 18.0.0
  react:
    installed: 19.0.0
    wanted: 19.0.0
  react-native:
    installed: 0.79.2
    wanted: 0.79.2
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: false
Stacktrace or Logs
Logs are not relevant for this bug.
MANDATORY Reproducer

https://github.com/hannojg/rn-animated-pressability

Screenshots and Videos

See description above

コントリビューションガイド

コントリビューションガイドを開く

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

調査の方向性

github.com/hannojg/rn-animated-pressability にある必須の再現ケースから始め、新アーキテクチャを有効にした場合と無効にした場合で、アニメーション中の押下を比較してください。次に、ReactAndroid/src/main/java/com/facebook/react/uimanager/NativeViewHierarchyManager.java と ReactCommon/react/renderer/dom/DOM.cpp の参照されている実装を読み、ネイティブ測定で Pressability をどのようにサポートすべきかを判断してください。影響を受けるプラットフォームで、測定動作を後退させることなく、アニメーション中の押下が確実に機能すれば完了です。

索引モデルが issue の本文から書いたものです。

評価

技術スタック
react-native
領域
mobile-dev
issue の種類
バグ
難易度
5/5
見積もり時間
1週間以上
活発さ
停滞
明瞭さ
おおむね明確
初心者へのやさしさ
30/100

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