Падает ошибка при вызове класса.
Это главная страница
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:testdb/models/cat.dart';
import 'package:testdb/models/product.dart';
import 'package:testdb/widgets/bottom_bar.dart';
import 'package:testdb/widgets/catalog.dart';
import 'package:testdb/widgets/catalog_list.dart';
import 'package:testdb/widgets/item_card.dart';
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container(
child: Scaffold(
backgroundColor: Theme.of(context).primaryColor,
appBar: AppBar(
title: Text("Restaurant"),
leading: Icon(Icons.food_bank),
),
body: ProductsList(),
),
);
}
}
class ProductsList extends StatelessWidget {
@override
Widget build(BuildContext context) {
final productData = context.watch<ProductDataProvider>();
// final categoryData = context.watch<CategoryDataProvider>();
return Scaffold(
backgroundColor: Colors.amberAccent,
body: SafeArea(
child: Container(
height: MediaQuery.of(context).size.height - 85,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(35),
bottomRight: Radius.circular(35),
)
),
child: ListView(
padding: const EdgeInsets.all(10.0),
children: <Widget>[
Container(
child: ListTile(
title: Text(
'Освежающие напитки',
style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
),
subtitle: Text(
'Больше чем 100 видов напитков',
style: TextStyle(fontSize: 16,)
),
trailing: Icon(Icons.panorama_horizontal),
),
),
Container(
padding: const EdgeInsets.all(5.0),
height: 290,
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: productData.items.length,
itemBuilder: (context, int index) =>
ChangeNotifierProvider.value(
value: productData.items[index],
child: ItemCard(),
)
//ItemCard(product: productData.items[index]),
),
),
Container( !!!!ВОТ ТУТ!!!!
padding: const EdgeInsets.all(5.0),
width: 290,
child: CatalogList(),
)
// CatalogList()
// ...categoryData.items.map((value) {
// return CatalogListTile(name: value.title);
// }).toList(),
],
)
),
),
bottomNavigationBar: BottomBar(),
);
}
}
Вот тут сам виджет от которого ломается
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:testdb/models/cat.dart';
import 'package:testdb/screens/catalog_page.dart';
import 'package:testdb/services/db.dart';
class CatalogList extends StatefulWidget {
@override
_CatalogListState createState() => _CatalogListState();
}
class _CatalogListState extends State<CatalogList> {
DatabaseService db = DatabaseService();
List<Category> category = <Category>[];
loadData() async{
var stream = db.getCategories();
stream.listen((List<Category> data) {
setState(() {
category = data;
});
});
}
@override
Widget build(BuildContext context) {
return InkWell(
onTap: () {
Navigator.of(context).push(MaterialPageRoute(
// builder: (context) => ItemCatalog(imgUrl: name,),
));
},
child: Container(
padding: const EdgeInsets.all(10.0),
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: category.length,
itemBuilder: (BuildContext context, int index) {
// print(category);
final docdata = category[index].title;
return ListTile(
title: Text(docdata, style: TextStyle(color: Colors.black)),
);
}
//ItemCard(product: productData.items[index]),
),
),
);
}
@override
void initState() {
loadData();
super.initState();
}
}
если на убрать в виджете
scrollDirection: Axis.horizontal вроде как работает, но мне нужно именно горизонтально.
Вот ошибки
======== Exception caught by rendering library =====================================================
The following assertion was thrown during performResize():
Horizontal viewport was given unbounded height.
Viewports expand in the cross axis to fill their container and constrain their children to match their extent in the cross axis. In this case, a horizontal viewport was given an unlimited amount of vertical space in which to expand.
The relevant error-causing widget was:
ListView file:///H:/android/testdb/lib/widgets/catalog_list.dart:36:25
When the exception was thrown, this was the stack:
#0 RenderViewport.computeDryLayout.<anonymous closure> (package:flutter/src/rendering/viewport.dart:1414:15)
#1 RenderViewport.computeDryLayout (package:flutter/src/rendering/viewport.dart:1426:6)
#2 RenderBox.performResize (package:flutter/src/rendering/box.dart:2342:12)
#3 RenderObject.layout (package:flutter/src/rendering/object.dart:1763:9)
#4 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:118:14)
...
The following RenderObject was being processed when the exception was fired: RenderViewport#a855f NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
... needs compositing
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=361.4, 0.0<=h<=Infinity)
... size: MISSING
... axisDirection: right
... crossAxisDirection: down
... offset: ScrollPositionWithSingleContext#80e97(offset: 0.0, range: null..null, viewport: null, ScrollableState, ClampingScrollPhysics -> RangeMaintainingScrollPhysics, IdleScrollActivity#656bd, ScrollDirection.idle)
... anchor: 0.0
RenderObject: RenderViewport#a855f NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
needs compositing
parentData: <none> (can use size)
constraints: BoxConstraints(w=361.4, 0.0<=h<=Infinity)
size: MISSING
axisDirection: right
crossAxisDirection: down
offset: ScrollPositionWithSingleContext#80e97(offset: 0.0, range: null..null, viewport: null, ScrollableState, ClampingScrollPhysics -> RangeMaintainingScrollPhysics, IdleScrollActivity#656bd, ScrollDirection.idle)
anchor: 0.0
... center child: RenderSliverPadding#0efa1 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
... parentData: paintOffset=Offset(0.0, 0.0)
... constraints: MISSING
... geometry: null
... padding: EdgeInsets.zero
... textDirection: ltr
... child: RenderSliverList#15c12 NEEDS-LAYOUT NEEDS-PAINT
... parentData: paintOffset=Offset(0.0, 0.0)
... constraints: MISSING
... geometry: null
... no children current live
====================================================================================================
======== Exception caught by rendering library =====================================================
RenderBox was not laid out: RenderViewport#a855f NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1940 pos 12: 'hasSize'
The relevant error-causing widget was:
ListView file:///H:/android/testdb/lib/widgets/catalog_list.dart:36:25
====================================================================================================
======== Exception caught by rendering library =====================================================
RenderBox was not laid out: RenderViewport#a855f NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1940 pos 12: 'hasSize'
The relevant error-causing widget was:
ListView file:///H:/android/testdb/lib/widgets/catalog_list.dart:36:25
====================================================================================================
======== Exception caught by rendering library =====================================================
RenderBox was not laid out: RenderIgnorePointer#ad100 relayoutBoundary=up20 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1940 pos 12: 'hasSize'
The relevant error-causing widget was:
ListView file:///H:/android/testdb/lib/widgets/catalog_list.dart:36:25
====================================================================================================
Простой
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