VoiceOver focus order breaks when UI is updated asynchronously
还没有人认领这个 Issue。
评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 52/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 活跃
- 技术栈
- ios, react-native
- 领域
- accessibility, mobile
调研方向
首先在启用 VoiceOver 的 iPhone 上安装并运行 https://github.com/coolsoftwaretyler/focusissues 中的强制复现程序,然后按照列出的步骤操作,以观察异步更新后出现的过时文本和被困住的焦点。更新后的文本能够被朗读,并且向右滑过该文本时仍保持预期的焦点顺序而不会跳出应用,即表示完成。
由索引模型根据 Issue 内容生成。
描述
Description
When UI is updated from some asynchronous call like setTimeout, it seems the focus order of elements on the screens becomes broken (even when that focus order is correct before the UI change). The focus order jumps outside of the app (into the OS status bar, it seems?) and becomes trapped.
This seems like it may be related to https://github.com/react/react-native/issues/49462, but there are a few important differences I want to focus on:
- No keyboard behavior at all.
- This is not a problem that needs to be solved with custom focus order: the focus order is originally correct in a simple screen, but breaks when UI is changed from a
setTimeout(I'm assuming it has something to do with being an async UI update, but I haven't discovered enough details yet to back up that claim)
Steps to reproduce
- Install the reproducer on an iPhone device
- Open the application
- Turn on VoiceOver
- Walk through the screen. The focus order should work as you'd expect (goes down the screen in-order as elements are written)
- Move the focus back up to the "A" button and double tap to use it. UI is updated
- Move focus down the screen to the "B" button. It should work as it did in your first pass.
- Double tap the "B" button, wait for text to update to "2 new messages"
- Swipe to move focus down. Now you'll notice a few issues:
First issue: we read out the stale "checking for new messages" text, which is no longer visible if you waited for the messages to be checked and resolve to "2 new messages"
Second issue: if you try to move focus past "2 new messages" by swiping right, your focus jumps up to the top of the screen, and then you can't get out of it by swiping left or right.
React Native Version
0.87.0
Affected Platforms
Runtime - iOS
Output of npx @react-native-community/cli info
System:
OS: macOS 26.6.2
CPU: (16) arm64 Apple M3 Max
Memory: 500.75 MB / 48.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 24.2.0
path: /Users/tylerwilliams/.asdf/installs/nodejs/24.2.0/bin/node
Yarn:
version: 1.22.22
path: /Users/tylerwilliams/.asdf/shims/yarn
npm:
version: 11.3.0
path: /Users/tylerwilliams/.asdf/installs/nodejs/24.2.0/bin/npm
Watchman:
version: 2026.05.11.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.16.2
path: /Users/tylerwilliams/.asdf/shims/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 25.5
- iOS 26.5
- macOS 26.5
- tvOS 26.5
- visionOS 26.5
- watchOS 26.5
Android SDK:
API Levels:
- "31"
- "34"
- "35"
- "36"
- "36"
- "37"
Build Tools:
- 30.0.3
- 33.0.1
- 34.0.0
- 35.0.0
- 36.0.0
- 37.0.0
System Images:
- android-29 | Google Play ARM 64 v8a
- android-31 | Google APIs ARM 64 v8a
- android-32 | Google Play ARM 64 v8a
- android-33 | Google Play ARM 64 v8a
- android-34 | Google Play ARM 64 v8a
- android-35 | Google Play ARM 64 v8a
- android-36.1 | Google Play ARM 64 v8a
- android-36 | Google Play ARM 64 v8a
- android-37.1 | 16 KB Page Size Google Play ARM 64 v8a
Android NDK: Not Found
IDEs:
Android Studio: 2026.1 AI-261.26222.65.2613.15948027
Xcode:
version: 26.6/17F113
path: /usr/bin/xcodebuild
Languages:
Java:
version: 17.0.13
path: /usr/bin/javac
Ruby:
version: 3.3.4
path: /Users/tylerwilliams/.asdf/shims/ruby
npmPackages:
"@react-native-community/cli":
installed: 20.2.0
wanted: 20.2.0
react:
installed: 19.2.3
wanted: 19.2.3
react-native:
installed: 0.87.0
wanted: 0.87.0
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: true
newArchEnabled: true
iOS:
hermesEnabled: true
newArchEnabled: true
Stacktrace or Logs
No stack trace or log, it's not a crash or failure, just incorrect behavior.
MANDATORY Reproducer
https://github.com/coolsoftwaretyler/focusissues
Screenshots and Videos
https://github.com/user-attachments/assets/9506a48b-7ac4-4728-8908-1148aeb7ad07
- 主要语言
- C++
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