Flutter数字验证插件flutter_number_checker的使用

Flutter数字验证插件flutter_number_checker的使用

特性

开始使用

添加依赖

请在安装之前检查最新版本。如果新版本有问题，请使用旧版本。

dependencies:
  flutter:
    sdk: flutter
  # 添加 flutter_number_checker
  flutter_number_checker: ^{latest version}

或者运行以下命令：

flutter pub add flutter_number_checker

在Dart代码中添加以下导入：

import 'package:flutter_number_checker/flutter_number_checker.dart';

使用方法

在/example文件夹中添加更长的例子。参见示例以获取使用flutter_number_checker的完整示例应用。

int number = 7;
int number2 = 10;

// 普通方式检查是否为素数。
bool isPrime = await FlutterNumberChecker.isPrimeNumber(number);
print(isPrime); // true

// 使用扩展方法检查是否为素数。
bool isPrime2 = number2.isPrimeNumber();
print(isPrime2); // false

在Flutter项目中检查示例

导入包

你需要在使用此包时导入以下行：

import 'package:flutter_number_checker/flutter_number_checker.dart';

创建项目并声明HomeScreen为StatefulWidget

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Number Checker',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const HomeScreen(title: 'Flutter Number Checker'),
    );
  }
}

创建变量来存储要检查的数字

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

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key, required this.title});
  final String title;

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  num number = 7;
  num number2 = 10;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
        centerTitle: true,
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          /// 扩展方法检查
          const Text(
            '扩展方法检查',
            style: TextStyle(
              fontSize: 20,
              fontWeight: FontWeight.bold,
            ),
          ),

          /// 检查是否为素数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number 是否为素数：',
              ),
              Text(
                number.isPrimeNumber.toString(),
              ),
            ],
          ),

          /// 检查是否为斐波那契数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number 是否为斐波那契数：',
              ),
              Text(
                number.isFibonacciNumber.toString(),
              ),
            ],
          ),

          /// 检查是否为回文数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number 是否为回文数：',
              ),
              Text(
                number.isPalindromeNumber.toString(),
              ),
            ],
          ),

          /// 检查是否为阿姆斯特朗数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number 是否为阿姆斯特朗数：',
              ),
              Text(
                number.isArmstrongNumber.toString(),
              ),
            ],
          ),

          /// 检查是否为快乐数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number 是否为快乐数：',
              ),
              Text(
                number.isHappyNumber.toString(),
              ),
            ],
          ),

          /// 分割线
          const Divider(),

          /// 普通方法检查
          const Text(
            '普通方法检查',
            style: TextStyle(
              fontSize: 20,
              fontWeight: FontWeight.bold,
            ),
          ),

          /// 检查是否为素数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number2 是否为素数：',
              ),
              Text(
                FlutterNumberChecker.isPrimeNumber(number2).toString(),
              ),
            ],
          ),

          /// 检查是否为斐波那契数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number2 是否为斐波那契数：',
              ),
              Text(
                FlutterNumberChecker.isFibonacciNumber(number2).toString(),
              ),
            ],
          ),

          /// 检查是否为回文数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number2 是否为回文数：',
              ),
              Text(
                FlutterNumberChecker.isPalindromeNumber(number2).toString(),
              ),
            ],
          ),

          /// 检查是否为阿姆斯特朗数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number2 是否为阿姆斯特朗数：',
              ),
              Text(
                FlutterNumberChecker.isArmstrongNumber(number2).toString(),
              ),
            ],
          ),

          /// 检查是否为快乐数
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                '$number2 是否为快乐数：',
              ),
              Text(
                FlutterNumberChecker.isHappyNumber(number2).toString(),
              ),
            ],
          ),
        ],
      ),
    );
  }
}

运行项目查看结果

额外信息

• Flutter Number Checker (pub.dev)
• Flutter Number Checker (GitHub)

贡献

这是一个开源项目，欢迎任何人贡献。前往Github - Flutter Number Checker并fork该项目。然后克隆项目并进行修改。之后创建一个pull请求。我会审查这些更改，并在合适的情况下合并它们。

项目维护者 ❤️

Md. Al-Amin

有价值的贡献者 ✨

编程愉快 👨‍💻

许可证

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