flutter - 更改格式DateTime

Question

将“selectedDate”分配给“dateBirthdayUser”时，如何更改格式？我需要像“31/12/2019”那样的“dateBirthdayUser”显示日期。

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';


class _ProfileState extends State<Profile> {
  DateTime dateBirthdayUser = DateTime(1900, 01, 01, 00, 00, 00);
  DateTime selectedDate = DateTime.now();

  Future<Null> _selectDate(BuildContext context) async {
    final DateTime picked = await showDatePicker(
        builder: (BuildContext context, Widget child) {
        },
        locale: Locale('es'),
        context: context,
        initialDate: selectedDate,
        firstDate: DateTime(1950, 1),
        lastDate: DateTime(2100));
    if (picked != null && picked != selectedDate)
      setState(() {
        selectedDate = picked;        
        dateBirthdayUser = selectedDate;
      });
  }

Answer 1

check out this answer

您需要使用DateFormat类

import 'package:intl/intl.dart';

并将其用于不同的格式

Check official docs to date format class