欢迎光临
我的个人博客网站

avalonia项目在银河麒麟操作系统arm架构上运行报错:default font family is not be null or empty

最近在做c#跨平台项目的时候,遇到了avalonia项目在银河麒麟操作系统上运行时报错:default font family is not be null or empty。但是在windows、ubuntu上运行没有问题。最终通过查看avalonia源码和官方提供的测试示例找到解决方案。(记录一下,避免以后忘了。。。)

第一步:将字体最为项目的嵌入资源导入进项目。

avalonia项目在银河麒麟操作系统arm架构上运行报错:default font family is not be null or empty

<ItemGroup>     <EmbeddedResource Include="AssetsFontsmsyh.ttc" />     <EmbeddedResource Include="AssetsFontsmsyhbd.ttc" />     <EmbeddedResource Include="AssetsFontsmsyhl.ttc" />   </ItemGroup>

第二步:新建一个类,作为自定义字体管理类。

public class CustomFontManagerImpl : IFontManagerImpl     {         private readonly Typeface[] _customTypefaces;         private readonly string _defaultFamilyName;          //Load font resources in the project, you can load multiple font resources         private readonly Typeface _defaultTypeface =             new Typeface("resm:AvaloniaApplication1.Assets.Fonts.msyh#微软雅黑");          public CustomFontManagerImpl()         {             _customTypefaces = new[] { _defaultTypeface };             _defaultFamilyName = _defaultTypeface.FontFamily.FamilyNames.PrimaryFamilyName;         }          public string GetDefaultFontFamilyName()         {             return _defaultFamilyName;         }          public IEnumerable<string> GetInstalledFontFamilyNames(bool checkForUpdates = false)         {             return _customTypefaces.Select(x => x.FontFamily.Name);         }          private readonly string[] _bcp47 = { CultureInfo.CurrentCulture.ThreeLetterISOLanguageName, CultureInfo.CurrentCulture.TwoLetterISOLanguageName };          public bool TryMatchCharacter(int codepoint, FontStyle fontStyle, FontWeight fontWeight, FontFamily fontFamily,             CultureInfo culture, out Typeface typeface)         {             foreach (var customTypeface in _customTypefaces)             {                 if (customTypeface.GlyphTypeface.GetGlyph((uint)codepoint) == 0)                 {                     continue;                 }                  typeface = new Typeface(customTypeface.FontFamily.Name, fontStyle, fontWeight);                  return true;             }              var fallback = SKFontManager.Default.MatchCharacter(fontFamily?.Name, (SKFontStyleWeight)fontWeight,                 SKFontStyleWidth.Normal, (SKFontStyleSlant)fontStyle, _bcp47, codepoint);              typeface = new Typeface(fallback?.FamilyName ?? _defaultFamilyName, fontStyle, fontWeight);              return true;         }          public IGlyphTypefaceImpl CreateGlyphTypeface(Typeface typeface)         {             SKTypeface skTypeface;              switch (typeface.FontFamily.Name)             {                 case FontFamily.DefaultFontFamilyName:                 case "微软雅黑":  //font family name                     skTypeface = SKTypeface.FromFamilyName(_defaultTypeface.FontFamily.Name); break;                 default:                     skTypeface = SKTypeface.FromFamilyName(typeface.FontFamily.Name,                         (SKFontStyleWeight)typeface.Weight, SKFontStyleWidth.Normal, (SKFontStyleSlant)typeface.Style);                     break;             }              return new GlyphTypefaceImpl(skTypeface);         }     }

第三步:在App.axaml.cs中重写RegisterServices()函数,将我们自定义的字体管理对象注册进去。

/// <summary>         /// override RegisterServices register custom service         /// </summary>         public override void RegisterServices()         {             AvaloniaLocator.CurrentMutable.Bind<IFontManagerImpl>().ToConstant(new CustomFontManagerImpl());             base.RegisterServices();         }

 

经过以上三个步骤,我的程序可以在windows、Ubuntu、银河麒麟操作系统上正常运行,没有出错。

赞(0) 打赏
未经允许不得转载:张拓的天空 » avalonia项目在银河麒麟操作系统arm架构上运行报错:default font family is not be null or empty
分享到: 更多 (0)

评论 抢沙发

  • 昵称 (必填)
  • 邮箱 (必填)
  • 网址

专业的IT技术经验分享 更专业 更方便

联系我们本站主机

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏