luoyi_flutter_font 1.0.1

flutter dynamic load font, optimize chinese font render effect

优化flutter中文字体渲染问题，动态从网络加载字体

安装依赖

flutter pub add luoyi_flutter_font

初始化默认字体

• 更新main.dart

import 'package:flutter/material.dart';
import 'package:luoyi_flutter_font/luoyi_flutter_font.dart';

late List<String> _fontFamilyFallback;

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  _fontFamilyFallback = await FlutterFont.initDefaultFont();
  runApp(const _App());
}

class _App extends StatelessWidget {
  const _App();

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        fontFamily: FlutterFont.fontFamily,
        fontFamilyFallback: _fontFamilyFallback,
      ),
      home: const HomePage(),
    );
  }
}

• pubspec.yaml添加中文字体，这是裁剪后的谷歌 NotoSansSC 字体，每个字体大约500kb，包含最常用的2000个中文汉字

flutter:
  uses-material-design: true
  fonts:
    - family: NotoSansSC
      fonts:
        - asset: packages/luoyi_flutter_font/fonts/NotoSansSC/NotoSansSC-Medium.ttf
        - asset: packages/luoyi_flutter_font/fonts/NotoSansSC/NotoSansSC-Bold.ttf

加载动态字体

void test() {
  // 加载系统字体
  FlutterFont.loadFont(FlutterFont.systemFont);

  // 加载 NotoSansSC 中文字体
  FlutterFont.loadFont(FlutterFont.chineseFont);

  // 加载初始化时应用的字体
  FlutterFont.loadFont(FlutterFont.initialFont);

  // 加载资产包中的字体，不要定义 fontUrl 和 fontWeights
  FlutterFont.loadFont(FontModel(
    fontFamily: 'my_font',
  ));

  // 加载在线字体
  FlutterFont.loadFont(FontModel(
    fontFamily: 'LongCang',
    fontUrl: 'https://fonts.gstatic.com/s/a/f626a05f45d156332017025fc68902a92f57f51ac57bb4a79097ee7bb1a97352.ttf',
  ));

  // 加载多种字重在线字体
  FlutterFont.loadFont(FontModel(
    fontFamily: 'NotoSansSC',
    fontWeights: {
      400: 'https://fonts.gstatic.com/s/a/eacedb2999b6cd30457f3820f277842f0dfbb28152a246fca8161779a8945425.ttf',
      500: 'https://fonts.gstatic.com/s/a/5383032c8e54fc5fa09773ce16483f64d9cdb7d1f8e87073a556051eb60f8529.ttf',
      700: 'https://fonts.gstatic.com/s/a/a7a29b6d611205bb39b9a1a5c2be5a48416fbcbcfd7e6de98976e73ecb48720b.ttf',
    },
  ));
}

库中的预设字体

以下字体配置已是测试出的最佳显示，有些字体文件比较特殊，例如苹方字体，Medium字库已自带了medium、bold两种字重， 当然，下面的字体只能渲染常用字重，如果引入100、200、300、800、900等极细、极重字体会大幅度增加应用尺寸。

flutter:
  uses-material-design: true
  fonts:
    # 谷歌开源字体，可以商用
    - family: NotoSansSC
      fonts:
        - asset: packages/luoyi_flutter_font/fonts/NotoSansSC/NotoSansSC-Bold.ttf
        - asset: packages/luoyi_flutter_font/fonts/NotoSansSC/NotoSansSC-Medium.ttf
        - asset: packages/luoyi_flutter_font/fonts/NotoSansSC/NotoSansSC-Regular.ttf
    # 苹方字体，Apple下的设备可以商用
    - family: PingFang SC
      fonts:
        - asset: packages/luoyi_flutter_font/fonts/PingFangSC/PingFangSC-Medium.otf
        - asset: packages/luoyi_flutter_font/fonts/PingFangSC/PingFangSC-Regular.otf
    # 小米字体，可以商用，提示：我试了多次，小米的字体文件不能同时加载400、500字重的字体
    - family: MiSans
      fonts:
        - asset: packages/luoyi_flutter_font/fonts/MiSans/MiSans-Semibold.ttf
        - asset: packages/luoyi_flutter_font/fonts/MiSans/MiSans-Medium.ttf
    # 鸿蒙字体，可以商用
    - family: HarmonyOS Sans SC
      fonts:
        - asset: packages/luoyi_flutter_font/fonts/HarmonyOS/HarmonyOS-Bold.ttf
        - asset: packages/luoyi_flutter_font/fonts/HarmonyOS/HarmonyOS-Medium.ttf
        - asset: packages/luoyi_flutter_font/fonts/HarmonyOS/HarmonyOS-Regular.ttf