将字符串时间和日期转换为 DateTime - Dart/Flutter [重复]

我有两个String inputs date & time. date好像12/01/2021 and time好像23:00。我想知道一种有效的方法将它们转换为DateTime使用 Flutter/Dart 的对象。

目前我正在使用以下代码。它工作得很好，但必须有更好的方法。

int year = int.parse(date.substring(6));
int month = int.parse(date.substring(0,2));
int day = int.parse(date.substring(3,5));
int hour = int.parse(time.substring(0,2));
int minute = int.parse(time.substring(3,5));
  
final DateTime newDate = DateTime(year,month,day,hour,minute);

在flutter中，我们可以使用DateTime.parse方法来达到此目的。您只需将字符串作为特定格式传递即可。

DateTime.parse("2012-02-27 13:27:00")

以下是一些可接受的字符串格式。

"2012-02-27 13:27:00" 
"2012-02-27 13:27:00.123456789z" 
"2012-02-27"
"13:27:00,123456789z" 
"20120227 13:27:00" 
"20120227T132700" 
"20120227"
"+20120227" 
"2012-02-27T14Z" 
"2012-02-27T14+00:00"

以下是我们将字符串转换为 DateTime 的 flutter 示例。

import 'package:flutter/material.dart';

void main() {
  runApp( MaterialApp(
       home: Home()
  ));
}

class Home extends  StatefulWidget {
  @override
  State<Home> createState() => _HomeState();
}

class _HomeState extends State<Home> {

  DateTime dt1 = DateTime.parse("2021-12-23 11:47:00");
  DateTime dt2 = DateTime.parse("2002-02-27T14:00:00-0500");


  @override
  Widget build(BuildContext context) {
    return Scaffold(
         appBar: AppBar(
            title: Text("Convert String to DateTime"),
            backgroundColor: Colors.redAccent,
         ),
          body: Container(
             alignment: Alignment.center,
             padding: EdgeInsets.all(20),
             child: Column(
               children:[

                   Text(dt1.toString()),
                   Text(dt2.toString())

                ]
             ),
          )
      );
  }
}

学分：https://flutterforyou.com/how-to-convert-string-to-datetime-in-flutter/ https://flutterforyou.com/how-to-convert-string-to-datetime-in-flutter/

更多有用资源的链接：

在flutter中将字符串转换为日期时间 https://stackoverflow.com/questions/58870208/convert-string-to-datetime-in-flutter

在 Flutter (Dart) 中将字符串解析为 DateTime https://stackoverflow.com/questions/59877288/parse-string-to-datetime-in-flutter-dart