import 'package:flutter/services.dart';

class StarInputFormatter extends TextInputFormatter {
  @override
  TextEditingValue formatEditUpdate(
      TextEditingValue oldValue, TextEditingValue newValue) {
    // 将新输入的文本转换为星号
    return TextEditingValue(
      text: '*' * newValue.text.length,
      selection: TextSelection.collapsed(offset: newValue.text.length),
    );
  }
}