Flutter，pubspec.yaml 文件显示一些错误

Posted 2023-02-23

【中文标题】Flutter，pubspec.yaml 文件显示一些错误

【英文标题】：Flutter,pubspec.yaml file is showing some errors

【发布时间】：2020-08-24 22:53:16

【问题描述】：

我不知道发生了什么，但我无法使用 pubspec.yaml file.Pub get 不加载依赖项通过资产图像插入图像。

请帮帮我。我正在运行一个颤振项目。

这是pubspec.yaml文件的代码

name: mi_card_flutter
description: A new Flutter application.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for ios style icons.
  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter
flutter:
  uses-material-design: true
  assets:
    images/khushi.jpg

错误是：

在 pubspec.yaml 中检测到错误： 预期“资产”是一个列表，但得到了图像/（字符串）。 请更正 C:\Users\khush\androidStudioProjects\mi_card_flutter\pubspec.yaml 中的 pubspec.yaml 文件 进程以退出代码 1 结束

【参考方案1】：

images/kushi.jpg 的缩进是错误的。

试试下面的代码：效果很好：

name: mi_card_flutter
description: A new Flutter application.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

dev_dependencies:
  flutter_test:
    sdk: flutter
flutter:
  uses-material-design: true
  assets:
    -images/

我希望这会有所帮助。

【讨论】：

在 pubspec.yaml 中检测到错误：预期“资产”是一个列表，但得到了 -images/khushi.jpg（字符串）。请更正 C:\Users\khush\AndroidStudioProjects\mi_card_flutter\pubspec.yaml 中的 pubspec.yaml 文件 进程以退出代码 1 完成，现在正在显示...基本上 pub get 不起作用

预期“资产”是一个列表，但得到了 -assests/images/（字符串）。这是什么意思？

预期的“资产”是一个列表，但得到了 -assests/images/（字符串）。

贴一张你的图片所在目录的截图@KhushiZawar

我也添加了截图

【参考方案2】：

请在pubspec.yaml文件中写入assets，如下图所示

dev_dependencies:
  flutter_test:
    sdk: flutter
flutter:
  uses-material-design: true
  assets:
    images/khushi.jpg

而不是这个

dev_dependencies:
  flutter_test:
    sdk: flutter
flutter:
  uses-material-design: true
  assets:
    - images/khushi.jpg

【讨论】：

C:\Users\khush\Downloads\flutter_windows_v1.12.13+hotfix.9-stable\flutter\bin\flutter.bat --no-color pub get 在 pubspec.yaml 中检测到错误：预期“ assets" 是一个列表，但得到了 images/khushi.jpg (String)。请更正 C:\Users\khush\AndroidStudioProjects\trial\pubspec.yaml 中的 pubspec.yaml 文件 再次相同！

@KhushiZawar 请在你使用这张图片的地方添加你的类文件代码？

好的，错误得到解决，现在显示这个，pub get 没有加载 C:\Users\khush\Downloads\flutter_windows_v1.12.13+hotfix.9-stable\flutter\bin\flutter.bat --no-color pub get 在 mi_card_flutter 中运行“flutter pub get”... 1.1s 进程以退出代码 0 结束

主要 dart 代码：import 'package:flutter/cupertino.dart'import 'package:flutter/material.dart'; void main() runApp(Myapp()); class Myapp extends StatelessWidget @override Widget build(BuildContext context) return MaterialApp( home: Scaffold( backgroundColor: Colors.black, body: SafeArea( child: Column( children: [ CircleAvatar( radius: 50.0, backgroundImage: AssetImage('images/khushi.jpg')), ], ), ), ), );

@KhushiZawar 使用 CircleAvatar(radius: 50.0, backgroundImage: AssetImage('assets/images/khushi.jpg'))

【参考方案3】：

所以终于在这个疑问上花了 3 个小时后。我得到了答案。我所做的是从终端运行 pub get 并且它起作用了！