Flutter插件daydart_flutter的使用方法

Flutter插件daydart_flutter的潜在使用方法

Flutter插件daydart_flutter简介

DayDart 是一个基于 day.js API 的时间处理库。它允许你在 Flutter 应用程序中轻松处理日期和时间。

Flutter插件daydart_flutter安装

首先，你需要在你的项目中安装 daydart 插件。运行以下命令：

dart pub add daydart
# 或者
flutter pub add daydart

Flutter插件daydart_flutter使用示例

初始化和基本操作

import 'package:daydart_flutter/daydart.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  DayDart dayDart = DayDart('2022-01-25');
  int _counter = 0;

  void _incrementCounter() {
    _counter++;
    setState(() {});

    // 打印一些日期信息
    print(dayDart.year()); // 输出当前年份
    print(dayDart.month()); // 输出当前月份
    print(dayDart.day()); // 输出当前日期
    print(dayDart.hour()); // 输出当前小时数
    print(dayDart.minute()); // 输出当前分钟数
    print(dayDart.second()); // 输出当前秒数
    print(dayDart.millisecond()); // 输出当前毫秒数

    // 修改日期
    dayDart = dayDart.add(1, DayUnits.D); // 添加一天
    dayDart = dayDart.subtract(1, DayUnits.h); // 减去一小时
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}

格式化和查询日期

print(dayDart.format("yyyy-MM-dd HH:mm:ss")); // 输出格式化的日期字符串
print(dayDart.isBefore(DayDart('2022-01-26'))); // 判断是否在给定日期之前
print(dayDart.isAfter(DayDart('2022-01-24'))); // 判断是否在给定日期之后
print(dayDart.isSame(DayDart('2022-01-25'))); // 判断是否与给定日期相同
print(dayDart.isLeapYear()); // 判断是否为闰年

转换为其他格式

print(dayDart.toISOString()); // 输出 ISO 8601 格式的字符串
print(dayDart.toMap()); // 输出日期的 Map 表示
print(dayDart.toList()); // 输出日期的列表表示