Flutter身份验证插件 dni_nie_validator 的使用

dni_nie_validator 是一个用于验证西班牙身份证（DNI）和外国人身份证（NIE）格式是否正确的Flutter插件。它不仅能验证输入的格式，还能计算对应的校验字母。

开始使用

引入插件

要在项目中使用该插件，请在 pubspec.yaml 文件中添加依赖：

dependencies:
  dni_nie_validator: ^最新版本号

然后导入到你的 Dart 文件中：

import 'package:dni_nie_validator/dni_nie_validator.dart';

示例代码

下面是一个完整的示例Demo，展示了如何使用 dni_nie_validator 插件来验证用户输入的DNI或NIE号码，并通过Snackbar显示验证结果。

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

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'DNI/NIE Validator',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'DNI/NIE Validator'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  final myController = TextEditingController();

  [@override](/user/override)
  void dispose() {
    myController.dispose();
    super.dispose();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'DNI/NIE Validator',
              style: TextStyle(
                fontWeight: FontWeight.bold,
                fontSize: 20,
              ),
            ),
            SizedBox(height: 10),
            Padding(
              padding: const EdgeInsets.all(16.0),
              child: TextField(
                controller: myController,
                decoration: InputDecoration(
                  border: OutlineInputBorder(borderSide: BorderSide(color: Colors.teal)),
                  hintText: 'Enter a document number',
                  labelText: 'DNI/NIE number',
                  prefixIcon: Icon(Icons.article_outlined, color: Colors.blue),
                ),
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _validateDocument(myController.text);
        },
        child: Icon(Icons.check),
        backgroundColor: Colors.blue,
      ),
    );
  }

  void _validateDocument(String value) {
    String validationMessage;
    if (value.isValidDNI()) {
      validationMessage = 'DNI Valid';
    } else if (value.isValidNIE()) {
      validationMessage = 'NIE Valid';
    } else {
      validationMessage = 'Invalid document';
    }

    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
      content: Text(validationMessage),
      action: SnackBarAction(
        label: 'Accept',
        onPressed: () {},
      ),
    ));
  }
}