我正在尝试使用“Pdf 创建库”在 flutter 应用程序中生成 pdf。当用其他语言生成 pdf 时，它会出现异常

Question

这是用于生成其他语言字体的 pdf 的代码：

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final Uint8List fontData = File('fonts/shivaji05.ttf').readAsBytesSync();\nfinal ttf = Font.ttf(fontData.buffer.asByteData());\n

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这就是我在文本中使用定义字体的方式：

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Text('\xe0\xa4\xb8\xe0\xa4\xbe\xe0\xa4\x88 \xe0\xa4\xac\xe0\xa4\xbe\xe0\xa4\xac\xe0\xa4\xbe', textScaleFactor: 2, style: new TextStyle(font: ttf)),\n

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错误日志

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E/flutter (26251): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: 'package:pdf/src/font.dart': Failed assertion: line 145 pos 14: 'false': \nE/flutter (26251): ---------------------------------------------\nE/flutter (26251): Can not decode the string to Latin1.\nE/flutter (26251): This font does not support Unicode characters.\nE/flutter (26251): If you want to use strings other than Latin strings, use a TrueType (TTF) font instead.</i>\n

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Answer 1

当我尝试使用 \xe2\x80\x9c Pdf 创建库\xe2\x80\x9d 在 flutter 应用程序中生成 pdf 时，我遇到了类似的错误。生成 pdf 时，在我的源文本中具有正确的单引号“ \xe2\x80\x99 ”“’”。

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有错误的代码

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final String soutceString = \'My source text with " \xe2\x80\x99 "\';\n\nfinal Document pdf = Document(deflate: zlib.encode);\n\npdf.addPage(\n    MultiPage(\n       build: (Context context) => <Widget>[\n            Paragraph(text: soutceString),\n       ]\n    )\n);\n

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错误日志

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flutter: \'package:pdf/src/font.dart\': Failed assertion: line 145 pos 14: \'false\':\n---------------------------------------------\nCan not decode the string to Latin1.\nThis font does not support Unicode characters.\nIf you want to use strings other than Latin strings, use a TrueType (TTF) font instead. \n

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当我发现错误的符号时，我只是替换它。

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具有快速修复功能的代码

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\nfinal String sourceString = \'My source text with " \xe2\x80\x99 "\';\n\nfinal Document pdf = Document(deflate: zlib.encode);\n\nsourceString.replaceAll(\'\xe2\x80\x99\', \'`\'),\n\npdf.addPage(MultiPage(\n   build: (Context context) => <Widget>[\n            Paragraph(text: sourceString)\n        ]\n    )\n);\n

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但我担心将来会出现新的错误符号。我将 arial.ttf 字体添加到资产中（arial.ttf 包含我的符号）并使用它。添加资产

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最适合我的情况

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import \'package:flutter/services.dart\' show rootBundle;\n\n\n\nfinal String sourceString = \'My source text with " \xe2\x80\x99 "\';\n\nfinal Document pdf = Document(deflate: zlib.encode);\n\npdf.addPage(MultiPage(\n     theme: Theme.withFont(\n        base: Font.ttf(await rootBundle.load("assets/arial.ttf")),\n        bold: Font.ttf(await rootBundle.load("assets/arial.ttf")),\n        italic: Font.ttf(await rootBundle.load("assets/arial.ttf")),\n        boldItalic: Font.ttf(await rootBundle.load("assets/arial.ttf")),\n      ),\n   build: (Context context) => <Widget>[\n            Paragraph(text: sourceString)\n          ]\n    )\n);\n\n

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