Flutter 插件refazynist的使用_refazynist是一个集成了刷新、懒加载和动画列表功能的Flutter
Flutter 插件refazynist的使用_refazynist是一个集成了刷新、懒加载和动画列表功能的Flutter
它正是你所需要的。是的，一个集成了刷新、懒加载和动画列表功能的Flutter列表。
刷新功能
它可以刷新数据。数据可以从服务器或本地系统获取，或者根据你的需求来决定。
缓存功能
它可以缓存数据。实时状态会保存到本地系统，并且可以从上次停止的地方继续加载。
懒加载功能
它可以实现懒加载。如果你希望懒加载，可以从服务器获取数据或其他方式。
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动画列表功能
这是一个强大的Flutter动画列表。它可以添加项目，删除项目，也可以清空所有项目。
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可滑动移除功能
它可以滑动移除项目。只需要简单地滑动即可删除项目。
使用方法
要使用此插件，需要在pubspec.yaml文件中添加refazynist作为依赖项。
dependencies:
refazynist: ^版本号
完整示例代码
以下是使用refazynist插件的一个完整示例：
import 'package:flutter/material.dart';
import 'package:refazynist/refazynist.dart';
import 'package:shared_preferences/shared_preferences.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Refazynist Dismissible Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: RefazynistDismissibleDemo(title: 'Refazynist Dismissible Demo'),
);
}
}
class RefazynistDismissibleDemo extends StatefulWidget {
RefazynistDismissibleDemo({Key? key, required this.title}) : super(key: key);
final String title;
[@override](/user/override)
_RefazynistDismissibleDemoState createState() => _RefazynistDismissibleDemoState();
}
class _RefazynistDismissibleDemoState extends State<RefazynistDismissibleDemo> {
GlobalKey<RefazynistState> refazynistKey = GlobalKey();
int lazyCount = 5; // 用于懒加载限制
String sharedPreferencesName = 'dismissible_demo'; // 用于缓存，存储在Shared Preferences中
[@override](/user/override)
Widget build(BuildContext bContext) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Refazynist(
key: refazynistKey,
sharedPreferencesName: sharedPreferencesName,
onInit: () async {
return ['Init item 1', 'Init item 2'];
},
emptyBuilder: (ewContext) {
return Stack(
children: [
ListView(),
Center(
child: Wrap(
children: [
Column(
children: [
Icon(
Icons.warning_amber_rounded,
size: 60,
color: Colors.black26,
),
Text ('Empty'),
Padding(padding: EdgeInsets.only(top: 20)),
ElevatedButton(
child: Text ('Create New'),
onPressed: () {
refazynistKey.currentState!.insertItem(0, 'Created item');
},
)
],
)
],
),
),
],
);
},
// 刷新功能
onRefresh: () async {
lazyCount = 5; // 重置懒加载计数
await Future.delayed(Duration(seconds: 2)); // 模拟网络延迟
return ['Refresh item 0', 'Refresh item 1', 'Refresh item 2'];
},
// 懒加载功能
onLazy: () async {
List<dynamic> lazyList = [];
if (lazyCount > 0) {
lazyCount--;
lazyList.add('Lazy item ' + (refazynistKey.currentState!.length() + 0).toString());
lazyList.add('Lazy item ' + (refazynistKey.currentState!.length() + 1).toString());
}
await Future.delayed(Duration(seconds: 1)); // 模拟网络延迟
return lazyList;
},
// itemBuilder
itemBuilder: (item, ibContext, index, animation, type) {
return Dismissible(
key: Key(item),
background: Container(
color: Theme.of(context).primaryColor,
child: Icon(Icons.delete_outline, color: Colors.white,),
),
onDismissed: (_) {
refazynistKey.currentState!.removeItem(index, disappear: true);
setState(() {});
},
child: FadeTransition(
opacity: animation,
child: Padding(
padding: EdgeInsets.only(left: 20, right: 20, top: 30, bottom: 30),
child: Row(
children: [
Expanded(child: Text('$item')),
ElevatedButton(
onPressed: () {
refazynistKey.currentState!.removeItem(index);
},
child: Icon(Icons.delete_outline)
)
],
),
),
)
);
},
// removedItemBuilder
removedItemBuilder: (item, ibContext, index, animation, type) {
return FadeTransition(
opacity: animation,
child: Padding(
padding: EdgeInsets.only(left: 20, right: 20, top: 30, bottom: 30),
child: Row(
children: [
Expanded(child: Text('$item')),
ElevatedButton(
onPressed: () {
refazynistKey.currentState!.removeItem(index);
},
child: Icon(Icons.delete_outline)
)
],
),
),
);
}
),
floatingActionButton: FloatingActionButton(
onPressed: () {
showModalBottomSheet(
context: context,
builder: (sbsContext) {
return ListView(
children: [
ListTile(
title: Text('Add item to top'),
onTap: () {
refazynistKey.currentState!.insertItem(0, 'Added item ${refazynistKey.currentState!.length()}');
},
),
ListTile(
title: Text('Remove item from top'),
onTap: () {
refazynistKey.currentState!.removeItem(0);
},
),
ListTile(
title: Text('Clear The List'),
onTap: () {
refazynistKey.currentState!.clear();
},
),
ListTile(
title: Text('Show Shared Preferences'),
onTap: () async {
SharedPreferences _prefs = await SharedPreferences.getInstance();
String? spString = _prefs.getString(sharedPreferencesName);
print('Shared Preferences: $spString');
showModalBottomSheet(
context: sbsContext,
builder: (sbsContext2) {
return TextField(
maxLines: 15,
decoration: InputDecoration.collapsed(hintText: spString),
);
},
);
},
),
ListTile(
title: Text('Clear Shared Preferences'),
onTap: () async {
SharedPreferences _prefs = await SharedPreferences.getInstance();
_prefs.setString(sharedPreferencesName, '');
},
)
],
);
},
);
},
child: Icon(Icons.add),
),
);
}
}更多关于Flutter 插件refazynist的使用_refazynist是一个集成了刷新、懒加载和动画列表功能的Flutter的实战教程也可以访问 https://www.itying.com/category-92-b0.html
