Flutter货币文本输入格式化插件currency_text_input_formatter_fork的使用

Flutter货币文本输入格式化插件currency_text_input_formatter_fork的使用

Currency Text Input Formatter for Flutter

该插件用于在Flutter应用中格式化货币文本输入。

安装

首先，在pubspec.yaml文件中添加依赖：

dependencies:
  currency_text_input_formatter: ^2.2.6

解决intl包冲突问题：

在pubspec.yaml文件末尾添加以下内容：

dependency_overrides:
  intl: your intl package version

使用

基本用法

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Welcome to Flutter'),
        ),
        body: Center(
          child: TextField(
            inputFormatters: [CurrencyTextInputFormatter.currency()],
            keyboardType: TextInputType.number,
          ),
        ),
      ),
    );
  }
}

带初始值的用法

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter',
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Welcome to Flutter'),
        ),
        body: Center(
          child: MyFormField(),
        ),
      ),
    );
  }
}

class MyFormField extends StatefulWidget {
  const MyFormField({ super.key });

  [@override](/user/override)
  State<MyFormField> createState() => _MyFormFieldState();
}

class _MyFormFieldState extends State<MyFormField> {
  final CurrencyTextInputFormatter _formatter = CurrencyTextInputFormatter.currency();

  [@override](/user/override)
  Widget build(BuildContext context) {
    return TextFormField(
      initialValue: _formatter.format('2000'),
      inputFormatters: <TextInputFormatter>[_formatter],
      keyboardType: TextInputType.number,
    );
  }
}

自定义选项

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter',
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Welcome to Flutter'),
        ),
        body: Center(
          child: TextField(
            inputFormatters: <TextInputFormatter>[
              CurrencyTextInputFormatter.currency(
                locale: 'ko',
                decimalDigits: 0,
                symbol: 'KRW(원) ',
              ),
            ],
            keyboardType: TextInputType.number,
          ),
        ),
      ),
    );
  }
}

使用内置方法

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter',
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Welcome to Flutter'),
        ),
        body: Center(
          child: MyFormField(),
        ),
      ),
    );
  }
}

class MyFormField extends StatefulWidget {
  const MyFormField({ super.key });

  [@override](/user/override)
  State<MyFormField> createState() => _MyFormFieldState();
}

class _MyFormFieldState extends State<MyFormField> {
  final CurrencyTextInputFormatter _formatter = CurrencyTextInputFormatter.currency();

  [@override](/user/override)
  Widget build(BuildContext context) {
    // 内置方法
    print(_formatter.getFormattedValue()); // $ 2,000
    print(_formatter.getUnformattedValue()); // 2000.00
    print(_formatter.format('2000')); // $ 2,000
    print(_formatter.formatDouble('20.00')); // $ 20

    return TextFormField(
      inputFormatters: <TextInputFormatter>[_formatter],
      keyboardType: TextInputType.number,
    );
  }
}