嘿，所以我将dateTime作为变量存储在我的一个应用页面中，我想在另一个页面上接收它，但是遇到了问题，
这是我将日期时间存储在变量中的位置：
import 'package:cycle/pages/homePage.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
class DatePicker extends StatefulWidget {
@override
_DatePickerState createState() => _DatePickerState();
}
//Today's Date
DateTime _currentdate = new DateTime.now();
//Storing the date time here
var lastMenusEnd ;
//Using date picker to get last menus
Future<Null> _selectdate(BuildContext context) async{
final DateTime _seldate = await showDatePicker(
context: context,
initialDate: _currentdate,
firstDate: DateTime(2020),
lastDate: DateTime(2100),
builder: (context,child) {
return Theme(
data: Theme.of(context).copyWith(
primaryColor: Colors.pinkAccent[200],
),
child: SingleChildScrollView(child: child,)
);
}
);
if(_seldate!=null) {
lastMenusEnd = _seldate;
Home(lastmenus: lastMenusEnd); // This is what am using to send it to the home page
}
}
class _DatePickerState extends State<DatePicker> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: SingleChildScrollView(
child: Align(
alignment: Alignment.center,
child: Column(
children : <Widget>[
Text(
'Hello',
textScaleFactor : 1,
style: TextStyle(
color: Colors.black,
fontFamily: 'Comic',
fontSize: 24
),
),
Text(
'Please insert correct details',
textScaleFactor : 1,
style: TextStyle(
color: Colors.black,
fontFamily: 'Comic',
fontSize: 24
),
),
Row(
children : <Widget>[
Text(
'When did your last menustration end ?',
textScaleFactor : 1,
style: TextStyle(
color: Colors.black,
fontFamily: 'Comic',
fontSize: 24
),
),
SizedBox(width: 16),
IconButton(onPressed: (){
_selectdate(context);
},icon: Icon(
Icons.calendar_today,
color: Colors.black,
),
),
]
),
]
),
),
),
);
}
}
这是我试图检索数据但无法获取的地方：
import 'package:cycle/animation/animationReflectly.dart';
import 'package:cycle/model/date.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:flutter/cupertino.dart';
class Home extends StatefulWidget {
DateTime lastmenus;
Home({this.lastmenus});
@override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
DateTime lastMenusEnd;
@override
void initState() {
super.initState();
lastMenusEnd = widget.lastmenus;
// Getting the present day
DateTime _currentdate = new DateTime.now();
//Using date picker to get last menus
//Day last menustration ended
//DateTime lastMenusEnd = Home.lastmenus;// use date picker to get the date and store it here
// Adding watch day periods to the last menus date
// So normally am using a set Day span of 28days...
// Cause its meant to range from 21days to 35days...
// So am adding a three day notice alert which is going to be on the 25th day...
// And also just a 2 day after.. Which will be in light pink box also
// cycle1
var d25 = lastMenusEnd.add(new Duration(days: 25));//minor alert
var d26 = lastMenusEnd.add(new Duration(days: 26));//minor alert
var d27 = lastMenusEnd.add(new Duration(days: 27));//minor alert
var d28 = lastMenusEnd.add(new Duration(days: 28));//major
var d29 = lastMenusEnd.add(new Duration(days: 29));//major
var d30 = lastMenusEnd.add(new Duration(days: 30));//major
var d31 = lastMenusEnd.add(new Duration(days: 31));//major ....
var d32 = lastMenusEnd.add(new Duration(days: 32));//major
var d33 = lastMenusEnd.add(new Duration(days: 33));//major
var d34 = lastMenusEnd.add(new Duration(days: 34));//minor alert
var d35 = lastMenusEnd.add(new Duration(days: 35));//minor alert
var d36 = lastMenusEnd.add(new Duration(days: 36));//minor alert
//cycle 2 (start 25day count from where major 4 ended)
var dd25 = d31.add(new Duration(days: 25));//minor alert
var dd26 = d31.add(new Duration(days: 26));//minor alert
var dd27 = d31.add(new Duration(days: 27));//minor alert
var dd28 = d31.add(new Duration(days: 28));//major
var dd29 = d31.add(new Duration(days: 29));//major
var dd30 = d31.add(new Duration(days: 30));//major
var dd31 = d31.add(new Duration(days: 31));//major ....
var dd32 = d31.add(new Duration(days: 32));//major
var dd33 = d31.add(new Duration(days: 33));//major
var dd34 = d31.add(new Duration(days: 34));//minor alert
var dd35 = d31.add(new Duration(days: 35));//minor alert
var dd36 = d31.add(new Duration(days: 36));//minor alert
//cycle 3 (start 25day count from where major ended)
var ddd25 = dd31.add(new Duration(days: 25));//minor alert
var ddd26 = dd31.add(new Duration(days: 26));//minor alert
var ddd27 = dd31.add(new Duration(days: 27));//minor alert
var ddd28 = dd31.add(new Duration(days: 28));//major
var ddd29 = dd31.add(new Duration(days: 29));//major
var ddd30 = dd31.add(new Duration(days: 30));//major
var ddd31 = dd31.add(new Duration(days: 31));//major ....
var ddd32 = dd31.add(new Duration(days: 32));//major
var ddd33 = dd31.add(new Duration(days: 33));//major
var ddd34 = dd31.add(new Duration(days: 34));//minor alert
var ddd35 = dd31.add(new Duration(days: 35));//minor alert
var ddd36 = dd31.add(new Duration(days: 36));//minor alert
//cycle 4 (start 25day count from where major ended)
var dddd25 = ddd31.add(new Duration(days: 25));//minor alert
var dddd26 = ddd31.add(new Duration(days: 26));//minor alert
var dddd27 = ddd31.add(new Duration(days: 27));//minor alert
var dddd28 = ddd31.add(new Duration(days: 28));//major
var dddd29 = ddd31.add(new Duration(days: 29));//major
var dddd30 = ddd31.add(new Duration(days: 30));//major
var dddd31 = ddd31.add(new Duration(days: 31));//major ....
var dddd32 = ddd31.add(new Duration(days: 32));//major
var dddd33 = ddd31.add(new Duration(days: 33));//major
var dddd34 = ddd31.add(new Duration(days: 34));//minor alert
var dddd35 = ddd31.add(new Duration(days: 35));//minor alert
var dddd36 = ddd31.add(new Duration(days: 36));//minor alert
var formattedToday = new DateFormat.yMMMd().format(_currentdate);
//Converting cycle 1 to a readable format
var d25F = new DateFormat.yMMMd().format(d25);
var d26F = new DateFormat.yMMMd().format(d26);
var d27F = new DateFormat.yMMMd().format(d27);
var d28F = new DateFormat.yMMMd().format(d28);
var d29F = new DateFormat.yMMMd().format(d29);
var d30F = new DateFormat.yMMMd().format(d30);
var d31F = new DateFormat.yMMMd().format(d31);
var d32F = new DateFormat.yMMMd().format(d32);
var d33F = new DateFormat.yMMMd().format(d33);
var d34F = new DateFormat.yMMMd().format(d34);
var d35F = new DateFormat.yMMMd().format(d35);
var d36F = new DateFormat.yMMMd().format(d36);
//Converting cycle 2 to a readable format
var dd25F = new DateFormat.yMMMd().format(dd25);
var dd26F = new DateFormat.yMMMd().format(dd26);
var dd27F = new DateFormat.yMMMd().format(dd27);
var dd28F = new DateFormat.yMMMd().format(dd28);
var dd29F = new DateFormat.yMMMd().format(dd29);
var dd30F = new DateFormat.yMMMd().format(dd30);
var dd31F = new DateFormat.yMMMd().format(dd31);
var dd32F = new DateFormat.yMMMd().format(dd32);
var dd33F = new DateFormat.yMMMd().format(dd33);
var dd34F = new DateFormat.yMMMd().format(dd34);
var dd35F = new DateFormat.yMMMd().format(dd35);
var dd36F = new DateFormat.yMMMd().format(dd36);
//Converting cycle 3 to a readable format
var ddd25F = new DateFormat.yMMMd().format(ddd25);
var ddd26F = new DateFormat.yMMMd().format(ddd26);
var ddd27F = new DateFormat.yMMMd().format(ddd27);
var ddd28F = new DateFormat.yMMMd().format(ddd28);
var ddd29F = new DateFormat.yMMMd().format(ddd29);
var ddd30F = new DateFormat.yMMMd().format(ddd30);
var ddd31F = new DateFormat.yMMMd().format(ddd31);
var ddd32F = new DateFormat.yMMMd().format(ddd32);
var ddd33F = new DateFormat.yMMMd().format(ddd33);
var ddd34F = new DateFormat.yMMMd().format(ddd34);
var ddd35F = new DateFormat.yMMMd().format(ddd35);
var ddd36F = new DateFormat.yMMMd().format(ddd36);
//Converting cycle 4 to a readable format
var dddd25F = new DateFormat.yMMMd().format(dddd25);
var dddd26F = new DateFormat.yMMMd().format(dddd26);
var dddd27F = new DateFormat.yMMMd().format(dddd27);
var dddd28F = new DateFormat.yMMMd().format(dddd28);
var dddd29F = new DateFormat.yMMMd().format(dddd29);
var dddd30F = new DateFormat.yMMMd().format(dddd30);
var dddd31F = new DateFormat.yMMMd().format(dddd31);
var dddd32F = new DateFormat.yMMMd().format(dddd32);
var dddd33F = new DateFormat.yMMMd().format(dddd33);
var dddd34F = new DateFormat.yMMMd().format(dddd34);
var dddd35F = new DateFormat.yMMMd().format(dddd35);
var dddd36F = new DateFormat.yMMMd().format(dddd36);
//Placing the newly formatted dates into the list for the List Tile
//Am also placing different colors on each list item
//Am also add a delay for the delayed Animation so it looks fresher
List<DateArrange> dates = [
DateArrange(dateName: formattedToday, color: Colors.white, delay: 3000),
// Cycle 1
DateArrange(dateName: d25F, color: Colors.pinkAccent[100], delay: 3100),//minor
DateArrange(dateName: d26F, color: Colors.pinkAccent[100], delay: 3200),//minor
DateArrange(dateName: d27F, color: Colors.pinkAccent[100], delay: 3300),//minor
DateArrange(dateName: d28F, color: Colors.red, delay: 3400),//major
DateArrange(dateName: d29F, color: Colors.red, delay: 3500),//major
DateArrange(dateName: d30F, color: Colors.red, delay: 3600),//major
DateArrange(dateName: d31F, color: Colors.red, delay: 3700),//major
DateArrange(dateName: d32F, color: Colors.red, delay: 3800),//major
DateArrange(dateName: d33F, color: Colors.red, delay: 3900),//major
DateArrange(dateName: d34F, color: Colors.pinkAccent[100], delay: 4000),//minor
DateArrange(dateName: d35F, color: Colors.pinkAccent[100], delay: 4100),//minor
DateArrange(dateName: d36F, color: Colors.pinkAccent[100], delay: 4200),//minor
// Cycle 2
DateArrange(dateName: dd25F, color: Colors.pinkAccent[100], delay: 4300),//minor
DateArrange(dateName: dd26F, color: Colors.pinkAccent[100], delay: 4400),//minor
DateArrange(dateName: dd27F, color: Colors.pinkAccent[100], delay: 4500),//minor
DateArrange(dateName: dd28F, color: Colors.red, delay: 4600),//major
DateArrange(dateName: dd29F, color: Colors.red, delay: 4700),//major
DateArrange(dateName: dd30F, color: Colors.red, delay: 4800),//major
DateArrange(dateName: dd31F, color: Colors.red, delay: 4900),//major
DateArrange(dateName: dd32F, color: Colors.red, delay: 5000),//major
DateArrange(dateName: dd33F, color: Colors.red, delay: 5100),//major
DateArrange(dateName: dd34F, color: Colors.pinkAccent[100], delay: 5200),//minor
DateArrange(dateName: dd35F, color: Colors.pinkAccent[100], delay: 5300),//minor
DateArrange(dateName: dd36F, color: Colors.pinkAccent[100], delay: 5400),//minor
// Cycle 3
DateArrange(dateName: ddd25F, color: Colors.pinkAccent[100], delay: 5500),//minor
DateArrange(dateName: ddd26F, color: Colors.pinkAccent[100], delay: 5600),//minor
DateArrange(dateName: ddd27F, color: Colors.pinkAccent[100], delay: 5700),//minor
DateArrange(dateName: ddd28F, color: Colors.red, delay: 5800),//major
DateArrange(dateName: ddd29F, color: Colors.red, delay: 5900),//major
DateArrange(dateName: ddd30F, color: Colors.red, delay: 6000),//major
DateArrange(dateName: ddd31F, color: Colors.red, delay: 6100),//major
DateArrange(dateName: ddd32F, color: Colors.red, delay: 6200),//major
DateArrange(dateName: ddd33F, color: Colors.red, delay: 6300),//major
DateArrange(dateName: ddd34F, color: Colors.pinkAccent[100], delay: 6400),//minor
DateArrange(dateName: ddd35F, color: Colors.pinkAccent[100], delay: 6500),//minor
DateArrange(dateName: ddd36F, color: Colors.pinkAccent[100], delay: 6600),//minor
// Cycle 4
DateArrange(dateName: dddd25F, color: Colors.pinkAccent[100], delay: 6700),//minor
DateArrange(dateName: dddd26F, color: Colors.pinkAccent[100], delay: 6800),//minor
DateArrange(dateName: dddd27F, color: Colors.pinkAccent[100], delay: 6900),//minor
DateArrange(dateName: dddd28F, color: Colors.red, delay: 7100),//major
DateArrange(dateName: dddd29F, color: Colors.red, delay: 7200),//major
DateArrange(dateName: dddd30F, color: Colors.red, delay: 7300),//major
DateArrange(dateName: dddd31F, color: Colors.red, delay: 7400),//major
DateArrange(dateName: dddd32F, color: Colors.red, delay: 7500),//major
DateArrange(dateName: dddd33F, color: Colors.red, delay: 7600),//major
DateArrange(dateName: dddd34F, color: Colors.pinkAccent[100], delay: 7700),//minor
DateArrange(dateName: dddd35F, color: Colors.pinkAccent[100], delay: 7800),//minor
DateArrange(dateName: dddd36F, color: Colors.pinkAccent[100], delay: 7900),//minor
];
}
final int delayedAmount = 500;
//final AuthService _auth = AuthService();
@override
Widget build(BuildContext context) {
return Container(
child: Scaffold(
backgroundColor: Colors.grey[300],
appBar: AppBar(
backgroundColor: Colors.grey[300],
elevation: 0.0,
actions: <Widget>[
IconButton(onPressed: (){
_selectdate(context);
},icon: Icon(
Icons.calendar_today,
color: Colors.black,
),)
],
),
body: SingleChildScrollView(
physics: ScrollPhysics(),
child: Column(
children: <Widget>[
Container(
margin: EdgeInsets.fromLTRB( 0 , 10, 0, 0),
child: Column(
children: <Widget>[
Align(
alignment: Alignment.topLeft,
child: DelayedAnimation(
child:
Text(
lastMenusEnd.toString(),
textScaleFactor : 1,
style: TextStyle(
fontFamily: 'Comic',
color: Colors.black,
fontSize: 30,
),
),
delay: delayedAmount + 1000,
),
),
Padding(
padding: const EdgeInsets.fromLTRB(0, 3, 0, 10),
child: DelayedAnimation(
child: Align(
alignment: Alignment.topLeft,
child: Text(
'This is your cycle:',
textScaleFactor : 1,
style: TextStyle(
fontFamily: 'Comic',
color: Colors.black,
fontSize: 25
),
),
),
delay: delayedAmount + 2000,
),
),
],
),
),
ListView.builder(
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemCount: dates.length,
itemBuilder: (context, index){
return DelayedAnimation(
child: Container(
margin: EdgeInsets.fromLTRB( 15, 0, 15, 10),
padding: EdgeInsets.symmetric(horizontal: 10, vertical: 10),
height: 110,
width: 160,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(17.0),
color: dates[index].color,
),
child: ListTile(
onTap: () {
//Shoe BreakFast, Lucnch $ Dinner for that day
},
title: Padding(
padding: const EdgeInsets.only(top: 8.0),
child: Text(
'${dates[index].dateName}',
textScaleFactor : 1,
style: TextStyle(
color: Colors.greenAccent[400],
fontFamily: 'Comic',
fontSize: 25
),
),
),
subtitle: Text(
'BreakFast, Lunch, Dinner',
textScaleFactor : 1,
style: TextStyle(
color: Colors.black87,
fontFamily: 'Comic',
fontSize: 14
),
),
// leading: Padding(
// padding: const EdgeInsets.fromLTRB(0, 12, 0, 0),
// child: CircleAvatar(
// backgroundImage: AssetImage(dates[index].image),
// radius: 20,
// ),
// ),
// trailing: Padding(
// padding: const EdgeInsets.fromLTRB(0, 14, 0, 9),
// child: CircleAvatar(
// child : Text(
// '${dates[index].dayName}',
// textScaleFactor : 1,
// style: TextStyle(
// color: Colors.black,
// fontFamily: 'Comic',
// fontWeight: FontWeight.bold,
// fontSize: 15
// ),
// ),
// radius: 30,
// backgroundColor: dates[index].color,
// ),
// ),
),
),
delay: delayedAmount + dates[index].delay,
// Using this logic for the delay.. this means the listview builder would always complete 1 cycle
// before its starts another. apply this for ads
);
}
),
],
),
),
),
);
}
}
所以我不知道如何将该信息传递给此页面
像这样导航到家...
if(_seldate!=null) {
lastMenusEnd = _seldate;
Navigator.push(context, MaterialPageRoute(builder: Home(lastmenus: lastMenusEnd)));
}