URI 的目标不存在：'package:velocity_x/velocity_x.dart'

问题描述

我刚刚为 Flutter 开发设置了我的 Windows，

所以我下载了Flutter SDK，并将其放在我的目录中。之后，我在命令行中设置了路径变量以使用 Flutter。

我还使用 Dart-Code 设置了我的 Visual Studio 代码，因此我有正确的语法高亮、IntelliSense 等。

我想使用veLocityX并安装了扩展。 并使用 PubSpec Assistant (Ctrl+Shift+p) 我添加了依赖项

所以当我打开visual studio代码时，它突出显示了导入方法，如下图（仅对VeLocityX包显示错误，不适用于material.dart）：

我想使用veLocityX并安装了扩展。 并使用 PubSpec Assistant 添加了依赖项。

这是我的 PubSpec 文件：-

name: radio_app
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: ">=2.7.0 <3.0.0"

dependencies:
  Flutter:
    sdk: Flutter
  audioplayers: ^0.17.4
  cupertino_icons: ^1.0.2
  veLocity_x: ^2.5.0

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

我也做了以下命令：-

Flutter clean

Flutter get packages

Flutter upgrade packages

并重新启动 VS 代码仍然无法正常工作

任何帮助将不胜感激..!!!!

解决方法

您需要保存 pubspec.yaml 文件。然后你就可以拿到那个包裹了。该文件仍处于编辑模式，如您的屏幕截图所示。

,

运行 flutter pub get 这应该可以解决问题。