flutter pub add age_calculator基于插件公开信息、社区数据与项目使用情况整理的选型参考。
age_calculator 包是一个专为 Flutter 设计的实用工具，用于计算一个人的年龄（以年、月、日表示）。它还允许用户精确计算两个日期之间的差异。适用于需要年龄验证或日期比较的应用程序，例如健康应用、注册表单或活动规划工具。该包支持所有主要平台，包括 Android、iOS、Web、macOS、Windows 和 Linux，确保跨平台的一致性。它为开发者提供了一个简单直观的 API，可轻松将年龄计算功能集成到其应用程序中。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
A Flutter package that allows you to perform operations between dates:
In your flutter project add the dependency:
dependencies: ... age_calculator: ^1.0.0
For help getting started with Flutter, view the online documentation.
import 'package:age_calculator/age_calculator.dart';
void main() {
DateTime birthday = DateTime(1997, 3, 5);
DateDuration duration;
// Find out your age as of today's date 2021-03-08
duration = AgeCalculator.age(birthday);
print('Your age is $duration'); // Your age is Years: 24, Months: 0, Days: 3
//Find out your age on any given date
duration = AgeCalculator.age(birthday, today: DateTime(2030, 5, 1));
print('Your age is $duration'); // Your age is Years: 33, Months: 1, Days: 26
// Find out when your next birthday will be at 2021-03-08
duration = AgeCalculator.timeToNextBirthday(birthday);
print('You next birthday will be in $duration');
// You next birthday will be in Years: 0, Months: 11, Days: 25
// Find out when your next birthday will be on any given date
duration = AgeCalculator.timeToNextBirthday(birthday,
fromDate: DateTime(2021, 3, 2));
print('You next birthday will be in $duration');
// You next birthday will be in Years: 0, Months: 0, Days: 3
// Find out the difference between two dates
duration = AgeCalculator.dateDifference(
fromDate: DateTime(2021, 1, 2),
toDate: DateTime(2025, 5, 2),
);
print('The difference is $duration');
// You next birthday will be in Years: 4, Months: 4, Days: 0
// Add time to any date
DateTime date = AgeCalculator.add(
date: DateTime(2021, 1, 2),
duration: DateDuration(years: 5, months: 2, days: 1));
print(date);
// 2026-03-03 00:00:00.000
}