升级Flutter至v3.7.6后flutter pub get/upgrade命令失效求助

核心问题：pubspec.yaml格式错误 #

你的pubspec.yaml存在缩进结构错误，flutter_lints: ^2.0.0被错误放置在flutter_native_splash配置块下方，不属于任何依赖节点，导致pub命令无法正确解析配置文件，这是引发flutter pub get/upgrade失败的直接原因。

修正后的pubspec.yaml配置 #

name: untitled1
description: A new Flutter project.

publish_to: 'none'

version: 1.0.0+1

environment:
  sdk: '>=2.18.1 <3.0.0'


dependencies:
  flutter_svg: ^1.1.6
  flutter:
    sdk: flutter

  cupertino_icons: ^1.0.2
  google_fonts: ^3.0.1
  lottie: ^2.2.0

dev_dependencies:
  flutter_native_splash: ^2.2.18
  flutter_test:
    sdk: flutter
  flutter_lints: ^2.0.0 # 移至dev_dependencies下，缩进对齐

flutter_native_splash:
  image: assets/newlogolight.jpg
  color: "ffffff"

flutter:
  uses-material-design: true
  assets:
     - assets/

后续操作步骤 #

1. 保存修正后的pubspec.yaml文件
2. 执行命令清理项目缓存：

   flutter clean
   

3. 重新获取依赖：

   flutter pub get
   

额外注意事项 #

如果修正格式后仍有问题，检查依赖版本兼容性：

• flutter_svg: ^1.1.6版本较老，Flutter 3.7.6建议升级至^2.0.0+1及以上版本
• 所有依赖版本可通过flutter pub upgrade自动适配当前Flutter版本（格式修正后执行）

内容的提问来源于stack exchange，提问作者Lucky Ugwu