TypeError：无法读取扑动中未定义的属性“应用程序”？颤动的网络不起作用？

Posted 2023-02-23

【中文标题】TypeError：无法读取扑动中未定义的属性“应用程序”？颤动的网络不起作用？

【英文标题】：TypeError: Cannot read property 'app' of undefined in flutter? and flutter web not working?

【发布时间】：2021-08-25 11:33:44

【问题描述】：

**我创建了新的颤振项目并在 pubspec.yaml 文件中添加了 cloud firestore，然后在我的项目未在 chrome web 上运行并显示“[+1534 ms] TypeError: Cannot read property 'app' of undefined”并删除Cloud Firestore 的依赖然后在 Web 上完美运行它的工作**

pubspec.yaml
name: ra_store
description: A new Flutter application.

# 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


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter
  cloud_firestore: ^2.2.1
  firebase_storage: ^8.1.1
  image_picker: ^0.8.0+1
  firebase_auth: ^1.3.0
  shared_preferences: ^2.0.6
  fluttertoast: ^8.0.7
  flutter_staggered_grid_view: ^0.4.0
  image: ^3.0.2
  provider: ^5.0.0
  path_provider: ^2.0.2
  intl:
#  cloud_firestore_web: ^2.1.1




# 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

谁能帮我解决这个错误

【问题讨论】：

这能回答你的问题吗？ TypeError: Cannot read property 'app' of undefined Error - Flutter using firebase Auth and Firestore in flutter web app

【参考方案1】：

将您的依赖项移至“依赖项”下。而不是 dev_dependencies 下。这应该可以解决您的问题。

dependencies:
  flutter:
    sdk: flutter

  cloud_firestore: ^2.2.1
  firebase_storage: ^8.1.1
  image_picker: ^0.8.0+1
  firebase_auth: ^1.3.0
  shared_preferences: ^2.0.6
  fluttertoast: ^8.0.7
  flutter_staggered_grid_view: ^0.4.0
  image: ^3.0.2
  provider: ^5.0.0
  path_provider: ^2.0.2
  intl:

  cupertino_icons: ^1.0.2

【讨论】：

您要运行哪个模拟器？是iOS还是安卓。因为要运行 iOS，您需要在 Podfile 中设置您的平台 :ios、'10.0'，然后需要运行 flutter clean、pod install 和其他一些步骤才能使用最新版本的 firebase 服务。

它在安卓上完美运行，但不能在网络上运行（Chrome）

抱歉，不是从网络开始的，只能在手机上工作。祝你好运，继续挖掘。你很快就会解决的。。。