flutter - 无法运行 'flutter pub get' 因为我的 sdk 版本低于它应该是

Question

我在项目中遇到问题。我想迁移到 flutter with null-safety。但是当我想运行“flutter pub get”时，我收到消息 -

The current Dart SDK version is 2.12.0-133.2.beta.

Because flutter_shareit requires SDK version >=2.12.0 <3.0.0, version solving failed.pub upgrade failed (1; Because flutter_shareit requires SDK version >=2.12.0 <3.0.0, version solving failed.)

我的 flutter 和 dart 版本是

Flutter 2.0.5 • channel stable • https://github.com/flutter/flutter.gitFramework • revision adc687823a (4 days ago) • 2021-04-16 09:40:20 -0700Engine • revision b09f014e96Tools • Dart 2.12.3

我尝试使用 flutter clean，但一切仍然保持不变

我的 pubspec.yaml

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^1.0.2
  flutter_icons: ^1.1.0
  dots_indicator: ^2.0.0
  flutter_staggered_grid_view: ^0.4.0
  flutter_point_tab_bar: ^0.2.0
  splashscreen: ^1.3.5




dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_launcher_icons: "^0.8.1"

flutter_icons:
  image_path: "assets/icons/logoo.png"   
  android: true
  ios: true

flutter:
  uses-material-design: true

  assets:
    - assets/images/friends/
    - assets/images/posts/
    - assets/images/saved/
    - assets/images/story/
    - assets/images/splash/
  #   - images/a_dot_ham.jpeg

  fonts:
    - family: Ubuntu-Regular
      fonts:
        - asset: assets/fonts/Ubuntu-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700

Answer 1

将 sdk 设置为 ">=2.10.0 <3.0.0" .切换到稳定版，然后将 flutter 升级到 2.0。

之后，您应该检查所有包并首先将它们升级到空安全。

只需关注 migration guide了解更多详情