Question

我尝试用以前的版本替换 riverpod 的版本，但没有任何效果。我也尝试删除 pubspec.lock 文件，运行 flutter clean 命令等，但没有任何效果。如果任何使用 flutter 2.2.2 的人能够使用 riverpod（任何版本），请帮忙。

pubspec.yaml 文件：

name: riverpod
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# 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.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.2
  flutter_riverpod: ^0.14.0+3

dev_dependencies:
  flutter_test:
    sdk: flutter

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true
  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg
  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.
  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages
  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

我在下面附上输出：

Running "flutter pub get" in riverpod...                        
Because riverpod depends on flutter_riverpod ^0.14.0+3 which depends on riverpod ^0.14.0+3, riverpod ^0.14.0+3 is required.
So, because riverpod is 1.0.0+1, version solving failed.

pub get failed (1; So, because riverpod is 1.0.0+1, version solving failed.)
exit code 1```

Answer 1

使用riverpod时，您只需要包含一个依赖项。

看来您包括了riverpod 和 flutter_riverpod。

相反，只使用 flutter_riverpod。

为了说明这一点：

有效的 pubspec.yaml 用于：

纯飞镖：

customWebpackConfig

非钩子：

dependencies:
  riverpod: ^0.14.0

钩子：

dependencies:
  flutter_riverpod: ^0.14.0

可以通过 flowchart in the docs 查看此信息。

编辑：您的具体问题是因为您的项目名为 riverpod。它与 hooks_riverpod 和 flutter_riverpod 的 riverpod 依赖相冲突。重命名您的项目，它就会起作用。

Answer 2

我遇到了这个问题。这是因为我将 name: riverpod 放在了我的 pubspec.yaml 文件中。我可以看到你也犯了同样的错误。更改名称并尝试。希望您节省时间。

使用新的 Flutter 2.2.2 版本为 Riverpod 运行“flutter pub get”时版本解决失败

2 个答案: