Flutter 获取日期

DateTime d = DeteTime.now();
d.yaear /*年*/
d.month /*月*/
d.day /*日*/
d.hour /*时*/
d.minuter /*分*/
d.second /*秒*/

获取时间戳

DateTime d = DateTime.now();
d.millisecondsSinceEpoch

日期转之间戳

DateTime d=DateTime(2023,08,1);
print(d.millisecondsSinceEpoch);

提示

在 Dart 中转换时间戳系统转换的时毫秒级，部分 SDK 的时间戳为 秒级需要做下计算

DateTime d=DateTime(2023,08,1);
print(d.millisecondsSinceEpoch ~/ 1000);

字符串转时间

DateTime d=DateTime.parse("2021-08-01 08:01:30");
print(d.millisecondsSinceEpoch);

时间戳转日期

DateTime d = DateTime(2023, 08, 1);
int unixtime = d.millisecondsSinceEpoch;
print(DateTime.fromMillisecondsSinceEpoch(unixtime));

时间加减

DateTime time = DateTime.now();
print(time);
print(time.add(const Duration(minutes: 30)));
print(time.add(const Duration(minutes: -30)))

弹出日期选择器

DateTime? time = await showDatePicker(
    context:context,
    initialDate:当前时间,
    firsDate:DateTime(1990), /*最早时期*/
    lastData:DateTime(2060), /* 最晚时期*/
)
if(time != null){
    print(time)
}

弹出时间选择器

TimeOfDay? time = await showTimePicker(
    context:context,
    initialTime:_time, /* 当前时间 */
)
if(time != null){
    print(time)
}

---

时间戳自定义格式化日期

安装

intl: ^0.18.1

使用

DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(timestamp * 1000); /*将秒转换为毫秒 */
DateTime localDateTime = dateTime.toLocal();
String formattedDate = DateFormat('yyyy-MM-dd').format(localDateTime);

---

国际化 flutter_localizations

第三方组件

配置 pubspec.yaml

dependencies:
    flutter:
    	sdk: flutter
    flutter_localizations:
    	sdk: flutter

配置根组件

import 'package:flutter_localizations/flutter_localizations.dart';
MaterialApp(
	localizationsDelegates: const [
    	/*此处*/
    	GlobalMaterialLocalizations.delegate,
    	GlobalWidgetsLocalizations.delegate,
    ],
    supportedLocales: const[
    	/*此处*/
   	 	Locale('zh', 'CH'),
    	Locale('en', 'US'),
	],
)

在组件中使用

showDatePicker() async{
    var date =await showDatePicker(
    	context: context,
    	initialDate: _datetime,
    	firstDate:DateTime(1900),
    	lastDate:DateTime(2050),
    	locale: Locale('zh'),
    );
    if(date==null) return;
    print(date);
    setState(() {
    	_datetime=date;
    });
}