Flutter Error: Member not found: 'UnicodeChar' [closed] - flutter

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After upgrading to flutter 3.0.0.
i am getting this error:
Error: Member not found: 'UnicodeChar'.
int get UnicodeChar => Char.UnicodeChar;
Error: Setter not found: 'UnicodeChar'.
set UnicodeChar(int value) => Char.UnicodeChar = value;
Error: Member not found: 'AsciiChar'.
int get AsciiChar => Char.AsciiChar;
Error: Setter not found: 'AsciiChar'.
set AsciiChar(int value) => Char.AsciiChar = value;
here is the image:

In my case, it was one of the transitive dependencies that was outdated.
Upgrading dependencies resolved the issue for me.
From the Terminal (inside the project's folder):
flutter pub upgrade
From Visual Studio Code
Open Command Palette... (⌘ Command+P on MacOS)
Type Flutter: Upgrade Packages
From Android Studio
Open Search Everywhere (Shift, Shift on MacOS)
Type Flutter Pub Upgrade

To solve the error do the following
upgrade all the third party packages
flutter clean
delete pubspec.lock file
flutter pub get
You can learn more from the link below
https://youtu.be/lxeB5ZZyJXM

if it happens to you during flutterfire configure command put it into your terminal to fix it:
dart pub global activate flutterfire_cli

Related

screen_util.dart:58:5: Error: 'FlutterWindow' isn't a type. FlutterWindow? window,

:/Users/afaqz/AppData/Local/Pub/Cache/hosted/pub.dev/flutter_screenutil-5.6.0/lib/src/screen_util.dart:58:5: Error: Type 'FlutterWindow' not found.
FlutterWindow? window,
^^^^^^^^^^^^^
/C:/Users/afaqz/AppData/Local/Pub/Cache/hosted/pub.dev/flutter_screenutil-5.6.0/lib/src/screen_util.dart:58:5: Error: 'FlutterWindow' isn't a type.
FlutterWindow? window,
^^^^^^^^^^^^^ show this massage when i upgrade the flutter dont know what to do?
i try alot but how to fix this problen no find any where
Was facing the same issue. Running flutter pub upgrade and flutter pub outdated in the terminal in the root folder of the project worked.

Member not found: 'FirebaseAppPlatform.verifyExtends' [duplicate]

This question already has answers here:
Error: Member not found: 'FirebaseAppPlatform.verifyExtends'
(17 answers)
Closed last month.
I am trying to build my first flutter project that given to me by my mentor. I did not change any code in my project but I encountered with this problem.
Error: Member not found: 'FirebaseAppPlatform.verifyExtends'.
FirebaseAppPlatform.verifyExtends(_delegate);
How can I solve this? I already tried most known solutions btw.
Probably you are using some Firebase dependency that is upgrading the Firebase Core Platform to the version 4.5.2. So what you should do is to explicitly add the version 4.5.1 in the dependencies of your pubspec.yaml file like this:
dependencies:
firebase_core_platform_interface: 4.5.1

When running the App, I get the error: Cannot find 'webviewController' in scope

I have searched the internet but cannot find others with the same problem. Does any one know how to fix the below error?
After updated XCode to version 14.0, my Flutter app failed to build. I have found out that the problematic package is html_editor_enhanced. If I remove it, then the build is successful, but I need it for allowing WYSIWYG editor. I see that it depends on another package called flutter_inappwebview, so I added it, but to no avail. When I try to build, the error in VSCode is:
Swift Compiler Error (Xcode): Cannot find 'webviewController' in scope /Users/<username>/development/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_inappwebview-5.4.3+7/ios/Classes/InAppWebView/FlutterWebViewFactory.swift:32:8 2
Swift Compiler Error (Xcode): Cannot find 'webviewController' in scope /Users/<username>/development/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_inappwebview-5.4.3+7/ios/Classes/InAppWebView/FlutterWebViewFactory.swift:33:15
And in XCode, the error is:
Cannot find 'webviewController' in scope
Below is the screenshot from XCode.
running the following command fixed the problem:
flutter pub cache repair

Flutter error: Unable to locate Android SDK

I know that there are a ton of solutions on Stack Overflow for this issue but none of them is working for me.
I downloaded the Android SDK using Homebrew and set the path to the SDK using this command: flutter config --android-sdk /usr/local/Caskroom/android-sdk and I got this output:
Setting "android-sdk" value to "/usr/local/Caskroom/android-sdk".
You may need to restart any open editors for them to read new settings.
Now, when I run flutter doctor --android-licenses, I get this error:
Unable to locate Android SDK.
I've tried almost all the solutions on Stack Overflow. What can I try next?

Flutter ObjectBox Unit Testing - Failed to load dynamic library 'lib/objectbox.dll' [closed]

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Closed 1 year ago.
This post was edited and submitted for review 6 months ago and failed to reopen the post:
Original close reason(s) were not resolved
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I'm building my new Flutter app with objectBox as DB.
When I write a unittest that includes objectBox, at running the test I get following error message:
Failed to load "C:\Dev\flutter_rebuild\test\db_model_test.dart": Invalid argument(s): Failed to load dynamic library 'lib/objectbox.dll': 126
I found this on:
https://opensourcelibs.com/lib/objectbox-dart
It shows how to download an include the "objectbox.dll" to Windows so that the test can run in Android Studio.
Dart standalone programs:
Install the packages pub get
Install objectbox-c system-wide:
macOS/Linux: execute the following command (answer Y when it asks about installing to /usr/lib)
bash <(curl -s https://raw.githubusercontent.com/objectbox/objectbox-dart/main/install.sh)
macOS: if dart later complains that it cannot find the libobjectbox.dylib you probably have to unsign the dart binary (source: dart issue):
sudo codesign --remove-signature $(which dart)
Windows: use "Git Bash" or similar to execute the following command
bash <(curl -s https://raw.githubusercontent.com/objectbox/objectbox-dart/main/install.sh)
Then copy the downloaded lib/objectbox.dll to C:\Windows\System32\ (requires admin privileges).
ObjectBox generates code binding code for classes you want stored based using build_runner. After you've defined your persisted entities (see below), run pub run build_runner build or flutter pub run build_runner build.