我有一个称为锚点的数据列表，其中包含指向详细屏幕的链接。每个锚点都有一个分发中心，它是一组嵌套对象。所以我能够将每个锚点的 id 解析到详细的屏幕上Oid我面临着循环遍历孩子们的挑战，即主播的配送中心。请任何人都可以帮助我，我能够将属于锚点的所有值拉到详细屏幕，但如何循环详细屏幕中的嵌套值是问题。嵌套值是下面数组中的 DistributionCentres。请问有人可以帮助我继续学习更多关于 flutter 的知识吗？
json 数组：
{
"Anchors": [
{
"Oid": 11,
"Name": "MAIZE ASSOCIATION OF NIGERIA",
"Acronym": "MAAN",
"DistributionCentres": [
{
"Oid": 11,
"Name": "Logo Centre (Zone A)",
"Address": "Private Warehouse, Ugba, Logo LGA"
},
{
"Oid": 12,
"Name": "Makurdi Centre (Zone B)",
"Address": "Ministry of Agric, Makurdi "
},
{
"Oid": 13,
"Name": "Oturkpo Centre (Zone C)",
"Address": "Private Warehouse, Oturkpo"
},
{
"Oid": 15,
"Name": "Borno MAAN centre",
"Address": "Bolori Store, Flavour Mill, Behind Vita Foam, Maiduguri"
},
{
"Oid": 18,
"Name": "Bauchi Centre",
"Address": "BASPD, Dass Road, Bauchi"
}
],
"NoOfDistributionCentres": 5
},
{
"Oid": 2,
"Name": "MAIZE GROWERS, PROCESSORS AND MARKETERS ASSOCIATION OF NIGERIA",
"Acronym": "MAGPAMAN",
"DistributionCentres": [
{
"Oid": 2,
"Name": "Guma Centre",
"Address": "P 32, 2nd Avenue Federal Housing Estate, N/Bank, Makurdi"
},
{
"Oid": 3,
"Name": "Logo Centre",
"Address": "Terhemen Akema Storage Facility, Ugba, Logo LGA"
},
{
"Oid": 5,
"Name": "Oturkpo Centre",
"Address": "Grain Store, Lower Benue Okele Project, Otukpo"
},
{
"Oid": 6,
"Name": "Gboko Centre",
"Address": "K3 New Road, Opposite former coca cola plant. Solar Schools Street, Gboko"
},
{
"Oid": 7,
"Name": "Gwer East Centre",
"Address": "Ahua Shardye's Warehouse, Behind Sylkan Filling Station, Ikpayongo , G/East LGA"
},
{
"Oid": 8,
"Name": "Kwande Centre",
"Address": "KM 3, Adagi Road, Adikpo"
},
{
"Oid": 9,
"Name": "Ohimini Centre",
"Address": "Ajoga Oglewu, Ohimini"
},
{
"Oid": 10,
"Name": "Oju Centre",
"Address": "Behind Town Hall, Ohuhu owo, Oju LGA"
}
],
"NoOfDistributionCentres": 8
}
],
}
带有详细屏幕链接的锚点页面：
import 'package:erg_app/AnchorDetails.dart';
import 'package:erg_app/Details.dart';
import 'package:erg_app/StockPage.dart';
import 'package:flutter/material.dart';
import 'package:erg_app/Widgets/nav-drawer.dart';
import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';
void main() => runApp(MaterialApp(
home: AnchorsPage(),
));
class AnchorsPage extends StatefulWidget {
@override
_MyHomeState createState() => _MyHomeState();
}
class _MyHomeState extends State<AnchorsPage> {
var user;
var userData;
List <dynamic> anchors = [];
@override
void initState() {
_getUserAnchor();
super.initState();
}
_getUserAnchor() async {
SharedPreferences localStorage = await SharedPreferences.getInstance();
var userJson = localStorage.getString('loginRes');
user = json.decode(userJson);
setState(() {
anchors = user['Anchors'];
});
print(anchors);
setState(() {
userData = anchors;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
drawer: NavDrawer(),
appBar: AppBar(
title: Text('Anchors Details'),
iconTheme: IconThemeData(color: Colors.white),
backgroundColor: Colors.green,
),
body: Container(
padding: const EdgeInsets.fromLTRB(10, 30, 10, 10),
child: ListView(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Icon(Icons.card_membership,
size: 35, color: Colors.orange[400]),
Text(
'Assigned Anchors',
style: TextStyle(color: Colors.orange[400], fontSize: 25),
),
],
),
ListView.builder(
shrinkWrap: true,
itemCount: anchors.length,
physics: NeverScrollableScrollPhysics(),
itemBuilder: (BuildContext context, int i) {
return Padding(
padding: const EdgeInsets.all(10.0),
////////////// 1st card///////////
child: Card(
elevation: 4.0,
color: Colors.grey[100],
margin: EdgeInsets.only(
left: 10, right: 10, top: 20, bottom: 10),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10)),
child: Container(
padding: EdgeInsets.only(left: 15, top: 20, bottom: 10),
width: MediaQuery.of(context).size.width,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Row(
children: <Widget>[
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
width: 50.0,
height: 50.0,
decoration: new BoxDecoration(
shape: BoxShape.circle,
image: new DecorationImage(
fit: BoxFit.cover,
image: AssetImage(
'assets/images/user.png')))),
),
SizedBox(
width: 20,
),
Text(
anchors[i]['Acronym'],
textAlign: TextAlign.center,
style: TextStyle(
color: Color(0xFF9b9b9b),
fontSize: 20,
decoration: TextDecoration.none,
fontWeight: FontWeight.normal,
),
),
],
),
Container(width: 10),
Row(
children: <Widget>[
Padding(
padding:
const EdgeInsets.only(left: 10, top: 10),
child: Text(
'Allocated Farmers:',
textAlign: TextAlign.left,
style: TextStyle(
color: Color(0xFF9b9b9b),
fontSize: 14.0,
decoration: TextDecoration.none,
fontWeight: FontWeight.normal,
),
),
),
Padding(
padding:
const EdgeInsets.only(left: 70, top: 12),
child: Text(
anchors[i]['Oid'].toString(),
textAlign: TextAlign.left,
style: TextStyle(
color: Colors.grey[700],
fontSize: 14.0,
decoration: TextDecoration.none,
fontWeight: FontWeight.normal,
),
),
),
],
),
Container(
height: 20,
),
Row(
children: <Widget>[
/////////// Buttons /////////////
Padding(
padding: const EdgeInsets.all(10.0),
child: FlatButton(
child: Padding(
padding: EdgeInsets.only(
top: 8,
bottom: 8,
left: 10,
right: 8),
child: Text(
'View Details',
textDirection: TextDirection.ltr,
style: TextStyle(
color: Colors.white,
fontSize: 15.0,
decoration: TextDecoration.none,
fontWeight: FontWeight.normal,
),
),
),
color: Colors.blueGrey,
shape: new RoundedRectangleBorder(
borderRadius:
new BorderRadius.circular(
20.0)),
onPressed: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) =>
detailsPage(value : anchors)));
},
),
),
/////////// End of Buttons /////////////
],
),
],
),
),
),
);
})
],
),
),
);
}
}
详细屏幕：
import 'package:flutter/material.dart';
class detailsPage extends StatefulWidget {
dynamic value;
detailsPage({Key key, @required this.value}) : super(key: key);
@override
_detailsPageState createState() => _detailsPageState(value);
}
class _detailsPageState extends State<detailsPage> {
dynamic value;
_detailsPageState(this.value);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Anchors Details Page"),
iconTheme: IconThemeData(color: Colors.white),
backgroundColor: Colors.green,
),
// body: Center(
// child: Text(
// value[1]['Name'].toString(),
// ),
// ),
body: Column(
children: <Widget>[
Padding(
padding: const EdgeInsets.all(8.0),
child: Card(
child: Column(
children: <Widget>[
Text(value[1]['Name']),
Text(value[1]['Oid'].toString()),
//Text(value [1]['DistributionCentres']),
],
),
),
),
],
),
);
}
}
