react / react/react-native

Some `accessibilityRole`/`role` have no effect on both iOS and Android

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Needs: Triage :mag: Platform: Android Platform: iOS
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描述

Description

Some values for the props accessibilityRole and role have no effect on both iOS and Android platforms.
Meaning the screenreader doesn't read the role after the accessibilityLabel.

accessibilityRole
With no effect
On iOS
[
  'alert', 'combobox', 'menu', 'menubar', 'menuitem', 'radio', 'radiogroup', 'scrollbar', 'spinbutton', 'tab',
  'tabbar', 'tablist', 'timer', 'list', 'toolbar',
]
On Android
[
  'tabbar', // Throws error on Android
  'search', 'keyboardkey',
]
With questionable effect
On iOS
[
  'togglebutton', // Gets the Traits value: `Button`, while the 'switch` role gets 2 traits `Button` and `Toggle`. Shouldn't the role togglebutton have the same traits as the 'switch' role?
]
role
With no effect
On iOS
[
  'alert', 'alertdialog', 'application', 'article', 'banner', 'cell', 'columnheader','combobox', 'complementary',
  'contentinfo', 'definition', 'dialog', 'directory', 'document', 'feed', 'figure', 'form', 'grid', 'group',
  'list', 'listitem', 'log', 'main', 'marquee', 'math', 'menu', 'menubar', 'menuitem', 'meter', 'navigation',
  'none', 'note', 'option', 'presentation', 'radiogroup', 'region', 'row', 'rowgroup', 'rowheader', 'scrollbar',
  'searchbox', 'separator', 'slider', 'spinbutton', 'status', 'tab', 'table', 'tablist', 'tabpanel', 'term', 'timer',
  'toolbar', 'tooltip', 'tree', 'treegrid', 'treeitem',
]
On Android
[
  'alertdialog', 'application', 'article', 'banner', 'cell', 'columnheader', 'complementary', 'contentinfo', 'definition', 'dialog',
  'directory', 'document', 'feed', 'figure', 'form', 'group', 'listitem', 'log', 'main', 'marquee', 'math', 'meter', 'navigation',
  'note', 'option', 'presentation', 'region', 'row', 'rowgroup', 'rowheader', 'searchbox', 'separator', 'status', 'table', 'tablist',
  'tabpanel', 'term', 'tooltip', 'tree', 'treegrid', 'treeitem',
]
With questionable effect
On iOS
[
  'radio', // Not questionable, but if the same value is provided on the `accessibilityRole` prop, no effect is taken.
]
Steps to reproduce
  1. Run application either on ios or android yarn ios or yarn android
  2. Enable VoiceOver or TalkBack
  3. Inspect elements which indicates the chosen platform in red
  4. The screen reader will reader only the accessibilityLabel "Item" although it have a role
React Native Version

0.78.0

Affected Platforms

Runtime - Android, Runtime - iOS

Output of npx @react-native-community/cli info
System:
  OS: macOS 15.2
  CPU: (12) arm64 Apple M3 Pro
  Memory: 71.34 MB / 18.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 22.8.0
    path: /opt/homebrew/bin/node
  Yarn: Not Found
  npm:
    version: 10.8.2
    path: /opt/homebrew/bin/npm
  Watchman:
    version: 2024.09.09.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.0
      - iOS 18.0
      - macOS 15.0
      - tvOS 18.0
      - visionOS 2.0
      - watchOS 11.0
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.1 AI-241.18034.62.2412.12266719
  Xcode:
    version: 16.0/16A242d
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.12
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.0.1
    wanted: 15.0.1
  react:
    installed: 19.0.0
    wanted: 19.0.0
  react-native:
    installed: 0.78.0
    wanted: 0.78.0
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true
Stacktrace or Logs
N/A
Reproducer

https://github.com/JoaoMosmann/ReactNativeVoiceOverRolesWithNoEffectReproducer-

Screenshots and Videos

Android Example:
https://github.com/user-attachments/assets/6ca4e808-c571-4758-a484-4d271810f33a

iOS Example:
https://github.com/user-attachments/assets/a5f8b125-eb0e-4420-bbfa-8f1afb5fd901

Whole list:

Image Image Image

贡献指南

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从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

调研方向

从链接的 ReactNativeVoiceOverRolesWithNoEffectReproducer 开始,并使用 yarn iosyarn android 运行它。使用 VoiceOver 和 TalkBack 检查列出的 accessibilityRolerole 值,然后跟踪平台对 accessibility-role 的处理。受影响的 role 能够在没有 Android 错误的情况下产生预期的播报,即表示完成。

由索引模型根据 Issue 内容生成。

评估

技术栈
android, ios, react-native
领域
accessibility, mobile
Issue 类型
缺陷
难度
4/5
预计耗时
3-5 天
活跃度
冷清
描述清晰度
基本清楚
新手友好度
48/100

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