Flutter密码验证插件flutter_pw_validator的使用

Flutter Password Validator

Flutter Password Validator 插件可以帮助您根据自定义规则验证用户输入的密码。以下是该插件的使用方法。

如何使用

1. 依赖它

在 pubspec.yaml 文件中添加依赖：

dependencies:
  flutter_pw_validator: ^latest_version # 替换为最新版本号

2. 安装它

通过命令行安装包：

flutter pub get

3. 使用

首先需要导入文件：

import 'package:flutter_pw_validator/flutter_pw_validator.dart';

然后将其放在密码输入框下方，并传递控制器给它：

TextField(
  controller: _passwordController,
),
FlutterPwValidator(
  controller: _passwordController,
  minLength: 6,
  uppercaseCharCount: 2,
  lowercaseCharCount: 2,
  numericCharCount: 3,
  specialCharCount: 1,
  width: 400,
  height: 150,
  onSuccess: yourCallbackFunction,
  onFail: yourCallbackFunction,
)

属性

国际化 (i18n)

如果您想翻译此插件，只需实现 FlutterPwValidatorStrings 类并将其传递给组件：

class FrenchStrings implements FlutterPwValidatorStrings {
  @override
  final String atLeast = 'Au moins - caractères';
  @override
  final String uppercaseLetters = '- Lettres majuscules';
  @override
  final String numericCharacters = '- Chiffres';
  @override
  final String specialCharacters = '- Caractères spéciaux';
}

FlutterPwValidator(
  // ...
  // 您的配置
  strings: FrenchStrings(),
)

示例项目

您可以参考 示例项目 来了解如何使用该插件。

完整示例代码

以下是一个完整的示例代码，展示了如何使用 flutter_pw_validator 插件：

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: Text("Flutter Pw Validator"),
        ),
        body: AppHome(),
      ),
    );
  }
}

class AppHome extends StatelessWidget {
  final TextEditingController controller = TextEditingController();

  /// 传递一个 key 以访问验证函数
  final GlobalKey<FlutterPwValidatorState> validatorKey = GlobalKey<FlutterPwValidatorState>();

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        Padding(
          padding: const EdgeInsets.symmetric(vertical: 15.0, horizontal: 12.5),
          child: Column(
            children: [
              Flexible(
                flex: 5,
                child: FlutterLogo(size: 200),
              ),
              Flexible(
                flex: 7,
                child: SingleChildScrollView(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      Padding(
                        padding: const EdgeInsets.symmetric(horizontal: 2.0),
                        child: TextField(
                          controller: controller,
                          decoration: InputDecoration(
                            hintText: "Password",
                            border: OutlineInputBorder(
                              borderSide: BorderSide(),
                            ),
                          ),
                        ),
                      ),
                      SizedBox(height: 5),
                      FlutterPwValidator(
                        key: validatorKey,
                        controller: controller,
                        minLength: 8,
                        uppercaseCharCount: 2,
                        lowercaseCharCount: 3,
                        numericCharCount: 3,
                        specialCharCount: 1,
                        normalCharCount: 3,
                        width: 400,
                        height: 200,
                        onSuccess: () {
                          print("MATCHED");
                          ScaffoldMessenger.of(context).showSnackBar(
                            SnackBar(content: Text("Password is matched")),
                          );
                        },
                        onFail: () {
                          print("NOT MATCHED");
                        },
                      ),
                    ],
                  ),
                ),
              )
            ],
          ),
        ),
      ],
    );
  }
}

希望以上内容能帮助您更好地理解和使用 flutter_pw_validator 插件！如果有任何问题，请随时提问。