iOS: negative min value and 0 as maximum value turns maximum to 1

まず、報告されたスライダー設定を iOS で再現し、Android と比較します。iOS の Slider 実装を追跡し、maximumValue が 0 の場合に minimumValue と maximumValue がどのように扱われるかを確認してから、最小値が負で最大値が 0 のケースのカバレッジを追加または更新します。完了条件は、指定された最大値を変更せずに iOS でスライダーが 0 に到達することです。

Environment

• react-native info output:

System:
  OS: macOS 26.3
  CPU: (12) arm64 Apple M2 Pro
  Memory: 109.70 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.19.5 // also tried node 24
    path: /Users/.../.nvm/versions/node/v20.19.5/bin/node
  npm:
    version: 10.9.4
    path: /Users/.../node_modules/.bin/npm
  Watchman: Not Found
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/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: Not Found
IDEs:
  Android Studio: 2025.1 AI-251.26094.121.2513.14007798
  Xcode:
    version: 26.3/17C529
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.17
    path: /Users/.../Library/Java/JavaVirtualMachines/corretto-17.0.17/Contents/Home/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.1.3
    wanted: 15.1.3
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.81.5
    wanted: 0.81.5
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Description

When creating a slider with minimumValue = -10 and maximumValue = 0, the application in android works as expected, but on iOS the maximumValue gets overwritten to 1.

Reproducible Demo

<Slider
      value={-5}
      minimumValue={-10}
      maximumValue={0} 
      step={0.5}
      onValueChange={(value) => {console.log('CURENTLY AT: ', value)}}
      onSlidingComplete=={(value) => {console.log('COMPLETE AT: ', value)}}
      tapToSeek={false}
/>

Using this slider the logs will show CURRENTLY AT 1 when sliding fully to the right on iOS and 0 on Android

My current workaround

I set maximum to 0.1 and for my business logic in onSlidingComplete I do Math.min(value, 0)