react / react/react-native

iOS - borderStyle: 'dashed' and 'dotted' no longer works in combination with overflow: hidden in 0.76

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Issue: Author Provided Repro Platform: iOS Resolution: PR Submitted
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描述

Description

After upgrading to expo 52 and react-native 0.76.3 I noticed some of my dashed borders had disappeared in some cases on iOS. On further investigation, I discovered that dashed borders no longer work when borderStyle: "dashed" | "dotted" are used in combination with overflow: "hidden" or overflow: "scroll". Instead of a dashed or dotted border, it shows a solid border.
Dotted and dashed borders work correctly with overflow: "visible"
Dotted and dashed borders also work correctly in android.

I took a cursory look through the source code, but couldn't see the issue - that being said, if someone can point me in somewhat the right direction, I'd be happy to take a swing at a fix.

Steps to reproduce
  1. Install the application and launch ios emulator
  2. look at the code in the stylesheet for the two items
  3. look at the missing borderStyle
Screenshot 2024-12-03 at 12 27 00 PM
React Native Version

0.76.3

Affected Platforms

Runtime - iOS

Output of npx react-native info
info Fetching system and libraries information...
System:
  OS: macOS 14.5
  CPU: (16) x64 Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz
  Memory: 181.07 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.19.0
    path: ~/.nvm/versions/node/v18.19.0/bin/node
  Yarn:
    version: 1.22.22
    path: /usr/local/bin/yarn
  npm:
    version: 10.2.3
    path: ~/.nvm/versions/node/v18.19.0/bin/npm
  Watchman:
    version: 4.9.0
    path: /usr/local/bin/watchman
Managers:
  CocoaPods:
    version: 1.10.0
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.1
      - iOS 18.1
      - macOS 15.1
      - tvOS 18.1
      - visionOS 2.1
      - watchOS 11.1
  Android SDK: Not Found
IDEs:
  Android Studio: 4.1 AI-201.8743.12.41.6953283
  Xcode:
    version: 16.1/16B40
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 18.0.1.1
    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: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.76.3
    wanted: 0.76.3
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: false
Stacktrace or Logs
no logs
Reproducer

https://github.com/jorjordandan/borderIssue

Screenshots and Videos

No response

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  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 borderIssue reproducer 开始,比较 overflow: hidden 或 scroll 与 visible 时 iOS 对虚线和点线边框的渲染效果。跟踪 React Native iOS 边框渲染路径,确定这些情况下边框变为实线的原因。当虚线和点线边框在受影响的 overflow 值下能够正确渲染,且不会导致 Android 或 visible overflow 行为发生回归时,即视为完成。

由索引模型根据 Issue 内容生成。

评估

技术栈
ios, 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
35/100

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