升级到Flutter 3.0.0后.
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:
