Flutter T 生成器:(BuildContext上下文){ 返回容器( 孩子:dp.DayPicker( selectedDate:DateTime.now(), 一旦更改:(日期时间){ if(打开)Navigator.pop(上下文、日期时间); 开=假; },
T 生成器:(BuildContext上下文){ 返回容器( 孩子:dp.DayPicker( selectedDate:DateTime.now(), 一旦更改:(日期时间){ if(打开)Navigator.pop(上下文、日期时间); 开=假; }, firstDate:DateTime.now().subtract(持续时间(天:360)), lastDate:DateTime.now().add(持续时间(天:360)), ), ); }).那么( (日期时间){ if(dateTime!=null){ 设置状态(){ date=dateTime.toIso8601String(); }); 打印(“日期时间:”+日期); }否则{ 打印(“未选择日期”); } }, ); } }Flutter T 生成器:(BuildContext上下文){ 返回容器( 孩子:dp.DayPicker( selectedDate:DateTime.now(), 一旦更改:(日期时间){ if(打开)Navigator.pop(上下文、日期时间); 开=假; },,flutter,Flutter,T 生成器:(BuildContext上下文){ 返回容器( 孩子:dp.DayPicker( selectedDate:DateTime.now(), 一旦更改:(日期时间){ if(打开)Navigator.pop(上下文、日期时间); 开=假; }, firstDate:DateTime.now().subtract(持续时间(天:360)), lastDate:DateTime.now().add(持续时间(天:360)), ), ); }).那么( (日期时间){ if(dateTim
感谢您的回复!这似乎解决了我的问题。我希望我能更好地理解为什么它被调用了两次,但在这一点上,我感谢任何解决办法。再次感谢
import 'package:flutter/material.dart';
import 'package:flutter_date_pickers/flutter_date_pickers.dart' as dp;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String date;
@override
void initState() {
// TODO: implement initState
super.initState();
date = DateTime.now().toIso8601String();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Selected Date:',
),
Text(
'$date',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
_openDatePicker(context);
},
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
void _openDatePicker(BuildContext context) {
showModalBottomSheet<DateTime>(
context: context,
builder: (BuildContext context) {
return Container(
child: dp.DayPicker(
selectedDate: DateTime.now(),
onChanged: (dateTime) {
Navigator.pop(context, dateTime);
},
firstDate: DateTime.now().subtract(Duration(days: 360)),
lastDate: DateTime.now().add(Duration(days: 360)),
),
);
}).then(
(dateTime) {
if (dateTime != null) {
setState(() {
date = dateTime.toIso8601String();
});
print('date time: ' + date);
} else {
print('No Day Selected');
}
},
);
}
}
import 'package:flutter/material.dart';
import 'package:flutter_date_pickers/flutter_date_pickers.dart' as dp;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String date;
bool open = false;
@override
void initState() {
// TODO: implement initState
super.initState();
date = DateTime.now().toIso8601String();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Selected Date:',
),
Text(
'$date',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
_openDatePicker(context);
},
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
void _openDatePicker(BuildContext context) {
open = true;
showModalBottomSheet<DateTime>(
context: context,
builder: (BuildContext context) {
return Container(
child: dp.DayPicker(
selectedDate: DateTime.now(),
onChanged: (dateTime) {
if(open)Navigator.pop(context, dateTime);
open = false;
},
firstDate: DateTime.now().subtract(Duration(days: 360)),
lastDate: DateTime.now().add(Duration(days: 360)),
),
);
}).then(
(dateTime) {
if (dateTime != null) {
setState(() {
date = dateTime.toIso8601String();
});
print('date time: ' + date);
} else {
print('No Day Selected');
}
},
);
}
}