A TextInputFormatter that prevents the insertion of more characters (currently defined as Unicode scalar values) than allowed.
Since this formatter only prevents new characters from being added to the text, it preserves the existing TextEditingValue.selection.
- maxLength, which discusses the precise meaning of "number of characters" and how it may differ from the intuitive meaning.
TextEditingValue oldValue TextEditingValue newValue) → TextEditingValue
Called when text is being typed or cut/copy/pasted in the EditableText. [...]
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → String
Returns a string representation of this object.