> _showDatePickerForCalendarOnly(BuildContext context) { return showDatePicker( context: context, // 上下文 initialDate: DateTime(2022, 5, 20), // 初始化选中日期 firstDate: DateTime(2022, 5), // 开始日期 lastDate: DateTime(2022, 7), // 结束日期 currentDate: DateTime.now(), // 当前日期...
然后从指针偏移到的位置开始提取4位字符,结果是2014(年的值) %date:~5,2% 表示指针从左向右偏...
// 初始化当前日期DateTime _nowDate=DateTime.now();print(formatDate(_nowDate,[yyyy,'年',mm,'月',dd]));// 2021年01月01print(formatDate(_nowDate,[yyyy,'年',mm,'月',dd,' ',HH,':',nn]))// 2021年01月01 12:00
如果_selectedDate属性没有默认值,请将其设置为可空值:
().padLeft(2,'0');@overrideStringdatePickerMinuteSemanticsLabel(int minute){return'1 分钟';}@overrideStringdatePickerMediumDate(DateTime date){return'${_shortWeekdays[date.weekday - DateTime.monday]} ''${_shortMonths[date.month - DateTime.january]} ''${date.day.toString().padRight(2)}';...
返回字符串 formatDate : 格式化时间,第一个字段是dateTime,第二个可选项表示格式 formatDateString : 格式化日期字符串,第一个字段例如:'2021-07-18 16:03:10',第二个字段例如:"yyyy/M/d HH:mm:ss" formatDateMilliseconds : 格式化日期毫秒时间,第一个字段例如:1213423143312,第二个字段例如:"yyyy/M/d ...
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}) : this.time = time ?? DateTime.now(), this.id = id ?? Uuid().v4(); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. React对比代码: import {v4} from 'uuid'; class Todo { constructor(task, id = v4(), complete = false, time = new Date().toLocaleS...
您已经使用模式CupertinoDatePickerMode.date初始化了CupertinoDatePicker。这将创建您所需的UI,但也有副...
import'package:uuid/uuid.dart';classTodo{boolcomplete;// todo的完成状态finalStringid;// todo的唯一idfinalDateTimetime;// todo创建时间Stringtask;// todo的具体任务Todo({this.task,this.complete=false,DateTimetime,Stringid}):this.time=time??DateTime.now(),this.id=id??Uuid().v4();} ...