假设有一个 App 首页的库文件,其中包含类 HomePage , HomePage 中包含两个方法,一个是 getCurrentTime ,另一个是 build 方法,代码注释如下(未实现其他部分代码)。 import'package:flutter/material.dart';/// APP 首页入口/// 本模块函数,加载状态类组件HomePageStateclassHomePageextendsStatefulWidget{@overridecreat...
String getCurrentTime(String prefix) { DateTime now = DateTime.now(); var formatter = DateFormat(‘yy-mm-dd HⓂ️s’); String nowTime = formatter.format(now); return ‘ nowTime’; } /// 有状态类返回组件信息 @override Widget build(BuildContext context) { return Text( getCurrentTime...
DateTime _selectedDate=DateTime.now();DayPicker(selectedDate:_selectedDate,currentDate:DateTime.now(),onChanged:(date){setState((){_selectedDate=date;});},firstDate:DateTime(2020,5,1),lastDate:DateTime(2020,5,31),displayedMonth:DateTime(2020,5),) 效果如下: selectableDayPredicate参数定义用户的...
}@overrideStringdatePickerMediumDate(DateTimedate) {return'${_shortWeekdays[date.weekday - DateTime.monday]}''${_shortMonths[date.month - DateTime.january]}''${date.day.toString().padRight(2)}'; }@overrideDatePickerDateOrdergetdatePickerDateOrder => DatePickerDateOrder.mdy;@overrideDatePickerDateTi...
DateTime _selectedDate = DateTime.now(); DayPicker( selectedDate: _selectedDate, currentDate: DateTime.now(), onChanged: (date) { setState(() { _selectedDate = date; }); }, firstDate: DateTime(2020, 5, 1), lastDate: DateTime(2020, 5, 31), ...
format(dateTime); ///发射更新数据 yield formatTime; } } 3 BlocBuilder BlocBuilder与StreamBuilder的作用一样,用来消费事件结果,就是显示数据结果,它的构建构建如下: class BlocBuilder<C extends Cubit<S>, S> extends BlocBuilderBase<C, S> { /// {@macro bloc_builder} const BlocBuilder({ Key ...
在Flutter中,可以使用DateTime类来获取当前日期和时间。DateTime类是Dart语言中用于表示日期和时间的内置类。它提供了许多方法和属性,可以方便地操作日期和时间。 要从DateTime类获取当前日期,可以使用DateTime.now()方法。这个方法返回一个表示当前日期和时间的DateTime对象。例如: 代码语言:txt 复制 DateTime currentDate ...
int remainder = (_currentMonthDays + _placeholderDays) % 7; if (remainder > 0) { rows = rows + 1; } return rows; } // 得到这个月的第一天是星期几 int _getPlaceholderDays({int? year, int? month}) { return DateTime(year!, month!).weekday - 1 % 7; ...
Dart provides theDateTimeclass to provide Date and Time-related functions. Thenow()method returns the DateTime object current date and time. Here is an example to get the Current timestamp in Dart voidmain() {print(DateTime.now().millisecondsSinceEpoch);//1646481543189print(newDateTime.now().mi...
>colors=[Colors.purple,Colors.blue,Colors.green,Colors.orange,Colors.cyan];setState((){tasks.add(TimePlannerTask(color:colors[Random().nextInt(colors.length)],dateTime:TimePlannerDateTime(day:Random().nextInt(10),hour:Random().nextInt(14)+6,minutes:Random().nextInt(60)),minutesDuration:...