Flutter 颤振应用程序在重新打开后与Hive DB发生问题
我在我的应用程序中使用hive DB,当我第一次运行代码时一切正常(我可以添加主类别,也可以添加子类别),但在关闭并打开我的应用程序后,我可以看到我在关闭应用程序之前保存的所有类,但当我在重新打开应用程序后尝试添加新类别时,应用程序会在我添加的新类别中显示firts category的项目。为什么我的应用程序在我再次关闭和打开时出现问题。谢谢你的帮助Flutter 颤振应用程序在重新打开后与Hive DB发生问题,flutter,flutter-hive,Flutter,Flutter Hive,我在我的应用程序中使用hive DB,当我第一次运行代码时一切正常(我可以添加主类别,也可以添加子类别),但在关闭并打开我的应用程序后,我可以看到我在关闭应用程序之前保存的所有类,但当我在重新打开应用程序后尝试添加新类别时,应用程序会在我添加的新类别中显示firts category的项目。为什么我的应用程序在我再次关闭和打开时出现问题。谢谢你的帮助 @override Widget build(BuildContext context) { return WillPopScop
@override
Widget build(BuildContext context) {
return WillPopScope(
child: SafeArea(
child: Scaffold(
backgroundColor: kColorTheme1,
appBar: AppBar(
centerTitle: true,
automaticallyImplyLeading: false,
elevation: 20,
backgroundColor: Color(0xFFF2C3D4).withOpacity(1),
title:TitleBorderedText(title:"Sevimli Yemekler", textColor: Color(0xFFFFFB00)),
actions: [
CircleAvatar(
radius: 27,
backgroundColor: Colors.transparent,
backgroundImage: AssetImage(kCuttedLogoPath),
),
],
),
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage(kBGWithLogoOpacity),
fit: BoxFit.cover,
),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Expanded(
child:GridView.builder (
scrollDirection: Axis.vertical,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),
itemCount: _categoryModelsBox.length+1,
itemBuilder: (context,index) {
if(_categoryModelsBox.length==0){
return EmptyCard(where: "homeScreen",);
}
if(_flag==1){
return EmptyCard(where: "homeScreen",);
}
if(index==_categoryModelsBox.length-1){
_flag=1;
CategoryModel categoryModel = _categoryModelsBox.getAt(index);
return CategoryCard(category: categoryModel);
}
else{
CategoryModel categoryModel = _categoryModelsBox.getAt(index);
return CategoryCard(category: categoryModel);
}
}
),
),
Column(
mainAxisAlignment: MainAxisAlignment.end,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Padding(
padding: EdgeInsets.all(10),
child: Container(
decoration: BoxDecoration(
border: Border.all(style: BorderStyle.solid),
color: kColorTheme7,
borderRadius: BorderRadius.circular(40),
),
child: TextButton(
onPressed: (){
showModalBottomSheet(
isDismissible: false,
enableDrag: false,
context: context,
builder: (BuildContext context)=> AddMenuScreen(buttonText: "Menü Ekle",route: "homeScreen",),
);
},
child: TitleBorderedText(title: "LEZZET GRUBU EKLE",textColor: Colors.white,)
),
),
),
],
)
],
),
)
),
),
onWillPop: ()async{
var response = await showAlertDialog(context);
print(response);
return response;
},
);
}
}
import'package:hive/hive.dart';
导入“包:lezzet_kitabi/subcategory model.dart”;
“类别模型g.dart”部分;
@HiveType(类型ID:0)
类CategoryModel扩展了HiveObject{
分类模型(
{this.categoryId,
此.categoryImagePath,
这个.categoryName,
这个,分类颜色,
这包括:子类别模型});
@HiveField(0)
最终int分类颜色;
@HiveField(1)
列出子类别模型;
@HiveField(2)
int分类;
@HiveField(3)
字符串类别图像路径;
@HiveField(4)
字符串类别名称;
}
//生成的代码-不要手动修改
“categoryModel.dart”的一部分;
// **************************************************************************
//类型适配器发生器
// **************************************************************************
类CategoryModelAdapter扩展了TypeAdapter{
@凌驾
最终int-typeId=0;
@凌驾
类别模型读取(二进制读取器){
final numofields=reader.readByte();
最终字段={
对于(inti=0;itypeId.hashCode;
@凌驾
布尔运算符==(对象其他)=>
相同的(这个,其他)||
另一个是CategoryModelAdapter&&
runtimeType==other.runtimeType&&
typeId==other.typeId;
}
void main()异步{
WidgetsFlutterBinding.ensureInitialized();
目录文档=等待getApplicationDocumentsDirectory();
蜂箱
..init(document.path)
..registerAdapter(CategoryModelAdapter())
…registerAdapter(子类别ModelAdapter())
..registerAdapter(IngRadientAdapter());
等待Hive.openBox('categoryModelsInBox');
SystemChrome.setPreferredOrientations(
[设备定向。肖像向上,设备定向。肖像向下];
runApp(MyApp());
}
类LocalStorageService{
}
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
回程多供应商(
供应商:[
ChangeNotifierProvider.value(值:IngredientsProvider()),
ChangeNotifierProvider.value(值:CompletedPageInfoProvider()),
],
孩子:MaterialApp(
debugShowCheckedModeBanner:false,
initialRoute:WelcomeScreen.id,
路线:{
SubCategoriesScreen.id:(上下文)=>SubCategoriesScreen(),
AddMenuScreen.id:(上下文)=>AddMenuScreen(),
WelcomeScreen.id:(上下文)=>WelcomeScreen(),
HomeScreen.id:(上下文)=>HomeScreen(),
RecipesScreen.id:(上下文)=>RecipesScreen(),
id:(上下文)=>CompletedRecipesScreen()
},
),
);
}
}
import 'package:hive/hive.dart';
import 'package:lezzet_kitabi/subCategoryModel.dart';
part 'categoryModel.g.dart';
@HiveType(typeId : 0)
class CategoryModel extends HiveObject{
CategoryModel(
{ this.categoryId,
this.categoryImagePath,
this.categoryName,
this.categoryColor,
this.subCategoryModels});
@HiveField(0)
final int categoryColor;
@HiveField(1)
List <SubCategoryModel> subCategoryModels;
@HiveField(2)
int categoryId;
@HiveField(3)
String categoryImagePath;
@HiveField(4)
String categoryName;
}
// GENERATED CODE - DO NOT MODIFY BY HAND
part of 'categoryModel.dart';
// **************************************************************************
// TypeAdapterGenerator
// **************************************************************************
class CategoryModelAdapter extends TypeAdapter<CategoryModel> {
@override
final int typeId = 0;
@override
CategoryModel read(BinaryReader reader) {
final numOfFields = reader.readByte();
final fields = <int, dynamic>{
for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
};
return CategoryModel(
categoryId: fields[2] as int,
categoryImagePath: fields[3] as String,
categoryName: fields[4] as String,
categoryColor: fields[0] as int,
subCategoryModels: (fields[1] as List)?.cast<SubCategoryModel>(),
);
}
@override
void write(BinaryWriter writer, CategoryModel obj) {
writer
..writeByte(5)
..writeByte(0)
..write(obj.categoryColor)
..writeByte(1)
..write(obj.subCategoryModels)
..writeByte(2)
..write(obj.categoryId)
..writeByte(3)
..write(obj.categoryImagePath)
..writeByte(4)
..write(obj.categoryName);
}
@override
int get hashCode => typeId.hashCode;
@override
bool operator ==(Object other) =>
identical(this, other) ||
other is CategoryModelAdapter &&
runtimeType == other.runtimeType &&
typeId == other.typeId;
}
void main() async{
WidgetsFlutterBinding.ensureInitialized();
Directory document = await getApplicationDocumentsDirectory();
Hive
..init(document.path)
..registerAdapter(CategoryModelAdapter())
..registerAdapter(SubCategoryModelAdapter())
..registerAdapter(IngredientAdapter());
await Hive.openBox<CategoryModel>('categoryModelsInBox');
SystemChrome.setPreferredOrientations(
[DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
runApp(MyApp());
}
class LocalStorageService {
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MultiProvider(
providers: [
ChangeNotifierProvider.value(value: IngredientsProvider()),
ChangeNotifierProvider.value(value: CompletedPageInfoProvider()),
],
child: MaterialApp(
debugShowCheckedModeBanner: false,
initialRoute: WelcomeScreen.id,
routes: {
SubCategoriesScreen.id:(context)=>SubCategoriesScreen(),
AddMenuScreen.id:(context)=>AddMenuScreen(),
WelcomeScreen.id:(context)=>WelcomeScreen(),
HomeScreen.id:(context)=>HomeScreen(),
RecipeScreen.id:(context)=>RecipeScreen(),
CompletedRecipeScreen.id:(context)=>CompletedRecipeScreen()
},
),
);
}
}