没有为“ThemeData”类定义吸气剂“accentColor”

Question

运行 Gradle 任务“assembleDebug”时，它失败并出现以下错误：

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Running Gradle task 'assembleDebug'...\n../../AppData/Local/Pub/Cache/hosted/pub.dev/rflutter_alert-2.0.4/lib/src/dialog_button.dart:63:43: Error: The getter 'accentColor' isn't defined for the class 'ThemeData'.\n - 'ThemeData' is from 'package:flutter/src/material/theme_data.dart' ('/C:/flutter/packages/flutter/lib/src/material/theme_data.dart').\nTry correcting the name to the name of an existing getter, or defining a getter or field named 'accentColor'.\n        color: color ?? Theme.of(context).accentColor,\n                                      ^^^^^^^^^^^\n

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这是包dialog_button.dart中的相应部分material

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decoration: BoxDecoration(\n    color: color ?? Theme.of(context).accentColor,\n    gradient: gradient,\n    borderRadius: radius,\n    border: border,\n),\n

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安装版本：

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Flutter 3.10.0-5.0.pre.29 \xe2\x80\xa2 channel master \xe2\x80\xa2 https://github.com/flutter/flutter.git\nFramework \xe2\x80\xa2 revision f74054467b (2 hours ago) \xe2\x80\xa2 2023-04-14 07:17:25 -0400\nEngine \xe2\x80\xa2 revision 4b96e38c92\nTools \xe2\x80\xa2 Dart 3.1.0 (build 3.1.0-4.0.dev) \xe2\x80\xa2 DevTools 2.23.1\n

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主题设置main.dart：

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theme: ThemeData.dark().copyWith(\n    pageTransitionsTheme: PageTransitionsTheme(\n      builders: Map<TargetPlatform, PageTransitionsBuilder>.fromIterable(\n        TargetPlatform.values,\n        value: (dynamic _) =>\n            const FadeUpwardsPageTransitionsBuilder(), //applying old animation\n      ),\n    ),\n    textSelectionTheme: const TextSelectionThemeData(\n      cursorColor: Colors.grey,\n      selectionHandleColor: Colors.grey,\n    ),\n    inputDecorationTheme: const InputDecorationTheme(\n      focusedBorder: UnderlineInputBorder(\n        borderSide: BorderSide(color: Colors.grey, width: 2),\n      ),\n    ),\n  ),\n

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如何修复它？

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Answer 1

Theme.of(context).accentColor在我的版本（3.7.9）上已弃用，可能在更新版本上删除，您可以使用

Theme.of(context).colorScheme.secondary,

Answer 2

您不应该更新.pub_cache. 您将丢失下一个的所有更改pub get。相反，像这样添加chewie_audio到您的dev_dependencies中pubspec.yaml：

dev_dependencies:
  chewie_audio: ^1.5.0

一旦原始chewie包解决了这个问题，您就可以将其从pubspec.yaml.