react / react/react-native

In IOS TextInput does not update style if copy and pasted string is bigger then maxLength

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Component: TextInput Issue: Author Provided Repro Newer Patch Available Platform: iOS
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描述

Description

In IOS the TextInput component does not update properly the style when copy and pasted string is bigger then maxLength, issue does not happen on Android. In the minimal reproducible example, there is a simple TextInput that should change text color to red, if text length is bigger or equal then 100 characters. If we copy and paste (using paste with long press) a string longer then 100, the color does not update to red. If user removes and adds last character manually, we can see color changing correctly to red.

Steps to reproduce
  1. Run yarn && npx pod-install && yarn ios
  2. Copy a string bigger then 100 characters
  3. Paste (using long press) the string
  4. Might be necessary to repeat steps 2 and 3 one more time
  5. Noticed color is still green and not red
React Native Version

0.75.2

Affected Platforms

Runtime - iOS

Output of npx react-native info
System:
  OS: macOS 14.5
  CPU: (12) arm64 Apple M2 Pro
  Memory: 91.03 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.12.1
    path: ~/.nvm/versions/node/v18.12.1/bin/node
  Yarn:
    version: 3.6.4
    path: ~/.nvm/versions/node/v18.12.1/bin/yarn
  npm:
    version: 8.19.2
    path: ~/.nvm/versions/node/v18.12.1/bin/npm
  Watchman: Not Found
Managers:
  CocoaPods:
    version: 1.15.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.5
      - iOS 17.5
      - macOS 14.5
      - tvOS 17.5
      - visionOS 1.2
      - watchOS 10.5
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.1 AI-241.15989.150.2411.11948838
  Xcode:
    version: 15.4/15F31d
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.10
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /Users/aureobeck/.rbenv/shims/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.75.2
    wanted: 0.75.2
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false
Stacktrace or Logs
No logs
Reproducer

https://github.com/aureosouza/TextInputDemo

Screenshots and Videos

Simulator Screenshot - iPhone 15 Pro - 2024-09-12 at 17 17 19

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 TextInputDemo 复现用例开始,并按照文档中的 yarn、pod-install 和 yarn ios 步骤操作。调查粘贴超过 100 个字符时 iOS TextInput 的行为,然后验证长度达到 maxLength 时颜色是否一致地发生变化;Android 应保持不受影响。

由索引模型根据 Issue 内容生成。

评估

技术栈
react-native
领域
mobile
Issue 类型
缺陷
难度
4/5
预计耗时
3-5 天
活跃度
停滞
描述清晰度
基本清楚
新手友好度
32/100

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