Flutter输入验证插件 in_validator 的使用

in_validator 是一个用于验证印度身份号码（如PAN、AADHAAR等）的Flutter插件。虽然该插件不会与政府数据进行验证，但它通过正则表达式和算法来验证这些号码。

特性

• 验证PAN
• 验证AADHAAR
• 验证驾驶执照号码
• 验证GST号码
• 验证护照号码

开始使用

在您的 pubspec.yml 文件中添加以下依赖项：

dependencies:
  in_validator: {version}

请将 {version} 替换为最新的版本号。

使用方法

首先，导入 in_validator 包：

import 'package:in_validator/in_validator.dart';

然后，您可以使用以下方法来验证不同的身份号码：

验证PAN

bool isValidPAN = PANValidator().isValid('XXXXX9999X');
print(isValidPAN); // 输出 true 或 false

验证AADHAAR

bool isValidAadhaar = AadhaarValidator().isValid('999941057058');
print(isValidAadhaar); // 输出 true 或 false

验证驾驶执照号码

bool isValidDL = DrivingLicenseValidator().isValid('HR-0620220034761');
print(isValidDL); // 输出 true 或 false

验证GST号码

bool isValidGST = GSTValidator().isValid('10AABCU9603R1Z2');
print(isValidGST); // 输出 true 或 false

验证护照号码

bool isValidPassport = PassportValidator().isValid('A2190457');
print(isValidPassport); // 输出 true 或 false

示例 Demo

完整的示例代码如下所示，展示如何在一个Flutter应用中集成 in_validator 插件：

import 'package:flutter/material.dart';
import 'package:in_validator/in_validator.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      debugShowCheckedModeBanner: false,
      home: const Example(),
    );
  }
}

class Example extends StatefulWidget {
  const Example({Key? key}) : super(key: key);

  [@override](/user/override)
  _ExampleState createState() => _ExampleState();
}

class _ExampleState extends State<Example> {
  final TextEditingController _panController = TextEditingController();
  final TextEditingController _aadhaarController = TextEditingController();
  final TextEditingController _dlController = TextEditingController();
  final TextEditingController _gstController = TextEditingController();
  final TextEditingController _passportController = TextEditingController();

  bool _isPanValid = false;
  bool _isAadhaarValid = false;
  bool _isDlValid = false;
  bool _isGstValid = false;
  bool _isPassportValid = false;

  void _validateInputs() {
    setState(() {
      _isPanValid = PANValidator().isValid(_panController.text);
      _isAadhaarValid = AadhaarValidator().isValid(_aadhaarController.text);
      _isDlValid = DrivingLicenseValidator().isValid(_dlController.text);
      _isGstValid = GSTValidator().isValid(_gstController.text);
      _isPassportValid = PassportValidator().isValid(_passportController.text);
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('in_validator Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              controller: _panController,
              decoration: InputDecoration(
                labelText: 'PAN Number',
                errorText: !_isPanValid && _panController.text.isNotEmpty ? 'Invalid PAN' : null,
              ),
            ),
            TextField(
              controller: _aadhaarController,
              decoration: InputDecoration(
                labelText: 'AADHAAR Number',
                errorText: !_isAadhaarValid && _aadhaarController.text.isNotEmpty ? 'Invalid AADHAAR' : null,
              ),
            ),
            TextField(
              controller: _dlController,
              decoration: InputDecoration(
                labelText: 'Driving License Number',
                errorText: !_isDlValid && _dlController.text.isNotEmpty ? 'Invalid DL' : null,
              ),
            ),
            TextField(
              controller: _gstController,
              decoration: InputDecoration(
                labelText: 'GST Number',
                errorText: !_isGstValid && _gstController.text.isNotEmpty ? 'Invalid GST' : null,
              ),
            ),
            TextField(
              controller: _passportController,
              decoration: InputDecoration(
                labelText: 'Passport Number',
                errorText: !_isPassportValid && _passportController.text.isNotEmpty ? 'Invalid Passport' : null,
              ),
            ),
            ElevatedButton(
              onPressed: _validateInputs,
              child: const Text('Validate'),
            ),
          ],
        ),
      ),
    );
  }
}