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:

CodePudding user response：

To solve the error do the following

1. flutter clean
2. delete pubspec.lock file
3. flutter pub get

You can learn more from the link below https://youtu.be/lxeB5ZZyJXM

CodePudding user response：

In my case, it was one of the transitive dependencies that was outdated.

Upgrading packages resolved the issue for me.

From Terminal (inside project's folder):

flutter pub upgrade

From VSCode

Open Command Palette....
Select Flutter: Upgrade Packages