问题：

在使用flutter 自动的日历选择组件CupertinoDatePicker的时候，flutter默认帮助我们做了国际化显示， 比如us ，年月日，月份是January…
而有时候我们想使用US，但又不想使用单词，我查看了官方API文档没有找到相关开放的配置。

    'January','February','March','April','May','June','July','August','September','October','November','December',

解决：

经过分析国际化配置CupertinoLocalizations，发现有DefaultCupertinoLocalizations和 GlobalCupertinoLocalizations CupertinoLocalizationAm 相关抽象类和实现类，
所以解决方法应运而生，就是extends这个默认实现类，重写想要的返回值，经过实践是可行，
下面粘贴一下相关代码，供大家参考：

源码

先建一个实现类，MyDefaultCupertinoLocalizations.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';class MyDefaultCupertinoLocalizations extends DefaultCupertinoLocalizations {static const List<String> _months = <String>['01','02','03','04','05','06','07','08','09','10','11','12',];@overrideString datePickerMonth(int monthIndex) => _months[monthIndex - 1];static Future<CupertinoLocalizations> load(Locale locale) {return SynchronousFuture<CupertinoLocalizations>(MyDefaultCupertinoLocalizations());}static const LocalizationsDelegate<CupertinoLocalizations> delegate =_CupertinoLocalizationsDelegate();
}class _CupertinoLocalizationsDelegateextends LocalizationsDelegate<CupertinoLocalizations> {const _CupertinoLocalizationsDelegate();@overridebool isSupported(Locale locale) => locale.languageCode == 'en';@overrideFuture<CupertinoLocalizations> load(Locale locale) =>MyDefaultCupertinoLocalizations.load(locale);@overridebool shouldReload(_CupertinoLocalizationsDelegate old) => false;@overrideString toString() => 'MyDefaultCupertinoLocalizations.delegate(en_US)';
}

在日历组件里配置这个类，就可以了，本文也到此结束，有问题可评论区讨论。

Localizations.override(context: context,locale: const Locale('en'),delegates: [ MyDefaultCupertinoLocalizations.delegate,],child: CupertinoDatePicker(initialDateTime: initialDateTime,minimumYear: minimumYear,maximumYear: maximumYear,maximumDate: maximumDate,minimumDate: minimumDate,dateOrder: DatePickerDateOrder.dmy,mode: CupertinoDatePickerMode.date,onDateTimeChanged: (newDateTimes) {newDateTime = newDateTimes;},),),