[英]Flutter Dart Error Format Timestep from Cloud_Firestore into Date
I Store the Meal and the Date in Cloud_Firestore.我将膳食和日期存储在 Cloud_Firestore 中。 Getting it back, it looks like this shown on the Screen Show.取回它,它看起来像在屏幕显示上显示的那样。
I tried to formate the Timestamp with DateTime but this doesn't work.我试图用 DateTime 形成时间戳,但这不起作用。 I also tried it with the intl.dart Package to format it, How can I parse the Timestamp and Format it into Year,Month and Day?我还尝试使用 intl.dart Package 对其进行格式化,如何解析时间戳并将其格式化为年、月和日?
Code代码
import 'package:flutter/material.dart';
import 'package:mealapp/models/Widgets/whenAndWhatToEat.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:intl/intl.dart';
import 'package:mealapp/models/global.dart';
class MealTile extends StatefulWidget {
final MealsAndWhen mealsAndWhen;
MealTile ({ this.mealsAndWhen });
@override
MealTileState createState() {
return MealTileState();
}
}
class MealTileState extends State<MealTile> {
String id;
final db = Firestore.instance;
String meal;
Widget buildItem(DocumentSnapshot doc) {
return Container(
margin: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(
'Meal: ${doc.data['Meal']}',
style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold, color: Colors.white),
textAlign: TextAlign.center,
),
Text(
'Date: ${doc.data['Date']}',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Colors.white),
textAlign: TextAlign.center,
),
SizedBox(height: 12),
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
SizedBox(width: 8),
FlatButton(
onPressed: () => deleteData(doc),
child: Text('Delete',
style: TextStyle(fontWeight: FontWeight.bold,
color: Colors.white)
),
),
],
),
],
),
decoration: BoxDecoration(
color: lightBlueColor,
borderRadius: BorderRadius.all(Radius.circular(12)),
),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: darkGreyColor,
body: ListView(
padding: EdgeInsets.only(top: 220),
children: <Widget>[
StreamBuilder<QuerySnapshot>(
stream: db.collection('mealList').snapshots(),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Column(children: snapshot.data.documents.map((doc) => buildItem(doc)).toList());
} else {
return SizedBox();
}
},
)
],
),
);
}
void deleteData(DocumentSnapshot doc) async {
await db.collection('mealList').document(doc.documentID).delete();
setState(() => id = null);
}
}
You can try to convert it to date before printing.您可以尝试在打印前将其转换为日期。
Text(
'Date: ${doc.data['Date'].toDate()}',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Colors.white),
textAlign: TextAlign.center,
),
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.