Setting caretHidden for a TextInput component on iOS (iPhone SE 3) causes continuous metal rendering errors
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描述
Description
Setting the caretHidden prop on a <TextInput> component when rendered on iOS results in an error that spams the iOS logs (~ 20-30 times per second):
Surface 1073741823 x 1073741823 is too large
As the error is generated so frequently this creates a lot of activity on the app. In my use case this is causing XCUITest to wait continuously for the app to be idle which never happens, so our end to end tests tend to stall when displaying a text input with a hidden caret.
We are using the iPhone SE 3 in the simulator for our testing which shows the error, it does not seem to occur with the iPhone 17 Pro, I haven't tested other phones but the obvious difference is the home button on the SE 3. I was able to reproduce this problem on a fresh v0.87 metro app with a single text input.
I believe this may be due to calculations that use the caret position that run even though the caret is not displayed, though I'm not 100% sure.
RCTUITextField.mm (for single line input) and RCTUITextView.mm for multi line input both set the caret to CGRectZero which would give it dimensions and size of 0, which I could see causing the problem, though I'm not sure what code is using these values for calculations.
Steps to reproduce
- Install the app with
npm install - Run the app on iOS on the iPhone SE 3 with
npm run ios -- --simulator="iPhone SE 3" - Open the Console.app and start viewing logs for the simulator (you can filter by
metalto make the error more clear) - Focus the input field by tapping on it
- Check the errors in the console app
React Native Version
0.87.1
Affected Platforms
Runtime - iOS
Output of npx @react-native-community/cli info
System:
OS: macOS 26.6.2
CPU: (14) arm64 Apple M4 Pro
Memory: 435.84 MB / 48.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 24.11.0
path: /Users/mario/.local/share/mise/installs/node/24.11.0/bin/node
Yarn:
version: 1.22.22
path: /Users/mario/.local/share/mise/installs/node/24.11.0/bin/yarn
npm:
version: 11.6.1
path: /Users/mario/.local/share/mise/installs/node/24.11.0/bin/npm
Watchman:
version: 2026.01.12.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.16.2
path: /Users/mario/.local/share/mise/installs/ruby/3.4.8/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 25.2
- iOS 26.2
- macOS 26.2
- tvOS 26.2
- visionOS 26.2
- watchOS 26.2
Android SDK:
API Levels:
- "29"
- "33"
- "35"
- "36"
Build Tools:
- 33.0.2
- 35.0.0
- 36.0.0
System Images:
- android-28 | Google APIs ARM 64 v8a
- android-29 | Google APIs ARM 64 v8a
Android NDK: Not Found
IDEs:
Android Studio: 2025.3 AI-253.32098.37.2534.15336583
Xcode:
version: 26.2/17C52
path: /usr/bin/xcodebuild
Languages:
Java:
version: javac 17
path: /Users/mario/.local/share/mise/shims/javac
Ruby:
version: 3.4.8
path: /Users/mario/.local/share/mise/installs/ruby/3.4.8/bin/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: 0.87.1
wanted: 0.87.1
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: true
newArchEnabled: true
iOS:
hermesEnabled: true
newArchEnabled: true
Stacktrace or Logs
Subsystem: com.apple.coreanimation
Category: Metal
Surface 1073741823 x 1073741823 is too large
MANDATORY Reproducer
https://github.com/mariovisic/react-native-example-ios-carret-error
Screenshots and Videos
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- 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
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- 提交 Pull Request,并在描述里引用这个 Issue 编号。
调研方向
使用 npm install 和 npm run ios -- --simulator="iPhone SE 3" 在必需的示例应用中复现该问题,然后检查 RCTUITextField.mm 第 216 行附近以及 RCTUITextView.mm 第 369-378 行附近的代码。对比启用 caretHidden 时的行为,并在字段获得焦点时查看 Metal 日志。对于已复现的 iOS TextInput 用例,不再出现连续的 Surface 1073741823 x 1073741823 is too large 错误即表示完成。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- ios, objective-c, react-native
- 领域
- mobile
- Issue 类型
- 缺陷
- 难度
- 3/5
- 预计耗时
- 1-2 天
- 活跃度
- 活跃
- 描述清晰度
- 基本清楚
- 新手友好度
- 68/100