react / react/react-native

[0.73.1] fontWeight not apply while using custom font

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描述

Description

I just tried to use custom font in my project template, and i realize when i want to use fontWeight as a reference of my custom font family it's not applicable, is it expected or am i doing something wrong while linking my custom font?

I'm expecting fontWeight should applicable with font as google fonts declared

  1. Thin 100
  2. Thin 100 Italic
  3. ExtraLight 200
  4. ...
Screen Shot 2024-01-02 at 00 08 25
Steps to reproduce
  1. Download font from google
  2. Extract downloaded font and copy font into project directory (without pt prefix)
  3. linking the fonts with react-native-asset
  4. Paste this code in App.[js/tsx]
import React from 'react';
import { Text, View } from 'react-native';

const TextExample = props => {
  const fontListRegularWithFontWeight = [
    {fontFamily: 'DMSans-Regular', fontWeight: '100'},
    {fontFamily: 'DMSans-Regular', fontWeight: '200'},
    {fontFamily: 'DMSans-Regular', fontWeight: '300'},
    {fontFamily: 'DMSans-Regular', fontWeight: '400'},
    {fontFamily: 'DMSans-Regular', fontWeight: '500'},
    {fontFamily: 'DMSans-Regular', fontWeight: '600'},
    {fontFamily: 'DMSans-Regular', fontWeight: '700'},
    {fontFamily: 'DMSans-Regular', fontWeight: '800'},
    {fontFamily: 'DMSans-Regular', fontWeight: '900'},
  ];

  const fontListWithCustomFontOnly = [
    {fontFamily: 'DMSans-Thin'},
    {fontFamily: 'DMSans-ExtraLight'},
    {fontFamily: 'DMSans-Light'},
    {fontFamily: 'DMSans-Regular'},
    {fontFamily: 'DMSans-Medium'},
    {fontFamily: 'DMSans-SemiBold'},
    {fontFamily: 'DMSans-Bold'},
    {fontFamily: 'DMSans-ExtraBold'},
    {fontFamily: 'DMSans-Black'},
  ];

  return (
    <View style={{flex: 1}}>
      <Text style={{textAlign: 'center'}}>Custom Font Regular with fontWeight</Text>
      <View style={{borderWidth: 1, margin: 14, padding: 14, marginBottom: 24, alignItems: 'center'}}>
        {fontListRegularWithFontWeight.map((x, i) => (
          <Text key={x.fontFamily + i} style={x}>
            {JSON.stringify(x)}
          </Text>
        ))}
      </View>

      <Text style={{textAlign: 'center'}}>Custom Font With Exact Font Name</Text>
      <View style={{borderWidth: 1, margin: 14, padding: 14, alignItems: 'center'}}>
        {fontListWithCustomFontOnly.map((x, i) => (
          <Text key={x.fontFamily + i} style={x}>
            {JSON.stringify(x)}
          </Text>
        ))}
      </View>
    </View>
  );
};

export default TextExample;
React Native Version

0.73.1

Affected Platforms

Runtime - Android

Output of npx react-native info
info Fetching system and libraries information...
System:
  OS: macOS 12.5
  CPU: (8) x64 Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
  Memory: 679.42 MB / 16.00 GB
  Shell:
    version: 5.8.1
    path: /bin/zsh
Binaries:
  Node:
    version: 18.19.0
    path: /usr/local/bin/node
  Yarn:
    version: 1.22.19
    path: ~/.yarn/bin/yarn
  npm:
    version: 10.2.3
    path: /usr/local/bin/npm
  Watchman:
    version: 2023.12.04.00
    path: /usr/local/bin/watchman
Managers:
  CocoaPods: Not Found
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 21.4
      - iOS 16.0
      - macOS 12.3
      - tvOS 16.0
      - watchOS 9.0
  Android SDK:
    API Levels:
      - "27"
      - "28"
      - "29"
      - "30"
      - "31"
      - "33"
      - "34"
    Build Tools:
      - 28.0.3
      - 29.0.2
      - 29.0.3
      - 30.0.2
      - 30.0.3
      - 31.0.0
      - 33.0.0
      - 33.0.1
      - 33.0.2
      - 34.0.0
    System Images:
      - android-23 | Intel x86 Atom_64
      - android-27 | Google APIs ARM 64 v8a
      - android-28 | Google APIs Intel x86 Atom
      - android-29 | Google APIs Intel x86 Atom
      - android-30 | Google APIs Intel x86 Atom
      - android-30 | Google Play ARM 64 v8a
      - android-34 | Google APIs Intel x86_64 Atom
    Android NDK: Not Found
IDEs:
  Android Studio: 2022.3 AI-223.8836.35.2231.10406996
  Xcode:
    version: 14.0.1/14A400
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.9
    path: /usr/bin/javac
  Ruby:
    version: 2.7.4
    path: /Users/administrator_1/.rvm/rubies/ruby-2.7.4/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.1
    wanted: 0.73.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: false


### Stacktrace or Logs

```text
noneed
Reproducer

https://snack.expo.dev/w667bnl74

Screenshots and Videos
Screen Shot 2024-01-02 at 00 14 50

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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 Snack 和 Android 0.73.1 上的 App.[js/tsx] 复现开始,检查两个 fontFamily/fontWeight 数组以及链接的 DM Sans 资源。将观察到的字重与预期的 100–900 映射进行比较;完成的标准是确定这是 React Native Android bug,还是字体链接或使用问题,并记录所需的修复或指导。

由索引模型根据 Issue 内容生成。

评估

技术栈
android, javascript, 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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