Flutter格式时间拾取器中的时间
Flutter格式时间拾取器中的时间
提问于 2019-05-08 16:03:30
我正在尝试格式化从我的flutter应用程序的时间选择器中选择的时间。我不知道为什么，但事实证明这比它应该要难的多。我试图实现的最终结果是小时:分钟或下午5:00这将在用户从时间选择器小部件中选择时间后显示在一个框容器中。我有一个名为'timeFormater()‘的方法，它将格式化选定的时间，但是当我运行我的代码时，我得到错误'flutter:类型'TimeOfDay’不是类型'Widget'的子类型。在flutter中有没有更简单的方法来格式化TimeOfDay()？
我的代码：
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:intl/intl.dart';
import 'package:auto_size_text/auto_size_text.dart';
import 'dart:io' show Platform;
class DateTimePicker extends StatefulWidget {
@override
_DateTimePickerState createState() => _DateTimePickerState();
}
class _DateTimePickerState extends State<DateTimePicker> {
DateTime _date = new DateTime.now();
TimeOfDay _time = new TimeOfDay.now();
Duration initialtimer = new Duration();
DateTime _datePicked;
TimeOfDay _timePicked;
@override
void initState() {
// timeController.addListener(_time);
}
@override
Widget build(BuildContext context) {
return Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.start,
// mainAxisSize: MainAxisSize.min,
children: <Widget>[
dateContainer(),
timeContainer()
],
),
Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
customDatePicker(context),
customTimePicker(context)
],
),
],
),
);
}
Widget customTimePicker(BuildContext context) {
return Padding(
padding: const EdgeInsets.only(left: 12.0),
child: FlatButton(
child: Text('Time', style: TextStyle(
color: Colors.white
),),
color: Colors.deepOrange,
onPressed: () => _selectedTime(context)
),
);
}
Future<Null> _selectedTime(BuildContext context) async {
_timePicked = await showTimePicker(
context: context,
initialTime: _time);
if (_timePicked != null) {
setState(() {
_time = _timePicked;
});
}
}
Widget timeContainer() {
return Container(
width: 100,
height: 100,
child: Padding(
padding: const EdgeInsets.only(left: 16.0, top: 16.0,bottom: 16.0),
child: Container(
decoration: BoxDecoration(
border: Border.all(
width: .5,
color: Colors.black
)
),
child: timeFormater(),
)
),
);
}
Widget timeFormater() {
return Column(
children: <Widget>[
SizedBox(
height: 20.0,
),
_timePicked != null
? TimeOfDay(hour: _timePicked.hour, minute: _timePicked.minute)
: SizedBox(
width: 0.0,
height: 0.0,
),
],
);
}
}错误消息：
flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
flutter: The following assertion was thrown building DateTimePicker(dirty, dependencies: [_InheritedTheme,
flutter: _LocalizationsScope-[GlobalKey#6c45d]], state: _DateTimePickerState#7eeb8):
flutter: type 'TimeOfDay' is not a subtype of type 'Widget'
flutter:
flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
flutter: more information in this error message to help you determine and fix the underlying cause.
flutter: In either case, please report this assertion by filing a bug on GitHub:
flutter: https://github.com/flutter/flutter/issues/new?template=BUG.md
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 _DateTimePickerState.timeFormater (package:rallie_app/utils/custom_date_timer.dart:176:13)
flutter: #1 _DateTimePickerState.timeContainer (package:rallie_app/utils/custom_date_timer.dart:163:20)
flutter: #2 _DateTimePickerState.build (package:rallie_app/utils/custom_date_timer.dart:37:15)
flutter: #3 StatefulElement.build (package:flutter/src/widgets/framework.dart:3830:27)
flutter: #4 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3741:15)
flutter: #5 Element.rebuild (package:flutter/src/widgets/framework.dart:3564:5)
flutter: #6 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2277:33)
flutter: #7 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:700:20)
flutter: #8 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:275:5)
flutter: #9 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
flutter: #10 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:930:9)
flutter: #11 _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:842:5)
flutter: #15 _invoke (dart:ui/hooks.dart:209:10)
flutter: #16 _drawFrame (dart:ui/hooks.dart:168:3)
flutter: (elided 3 frames from package dart:async)回答 7
Stack Overflow用户
发布于 2019-06-28 06:10:32
这将为您正确地格式化TimeOfDay：
final localizations = MaterialLocalizations.of(context);
final formattedTimeOfDay = localizations.formatTimeOfDay(timeOfDay);Stack Overflow用户
发布于 2020-05-30 02:58:00
String time =_timePicked.format(上下文)；
Stack Overflow用户
发布于 2020-03-03 03:24:43
这就是我如何在flutter平台上使用Date、Time和TimeOfDay在同一时间内将它们的值分开。
static DateTime _eventdDate = DateTime.now();
static var now =
TimeOfDay.fromDateTime(DateTime.parse(_eventdDate.toString()));
String _eventTime = now.toString().substring(10, 15);
Future _pickTime() async {
TimeOfDay timepick = await showTimePicker(
context: context, initialTime: new TimeOfDay.now());
if (timepick != null) {
setState(() {
_eventTime = timepick.toString().substring(10, 15);
});
} }
Future _pickDate() async {
DateTime datepick = await showDatePicker(
context: context,
initialDate: new DateTime.now(),
firstDate: new DateTime.now().add(Duration(days: -365)),
lastDate: new DateTime.now().add(Duration(days: 365)));
if (datepick != null) {
setState(() {
_eventdDate = datepick;
});
} }页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/56036145
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