Flutter模态列表展示插件kmodal_listview的使用
Flutter模态列表展示插件kmodal_listview的使用
kmodal_listview
是一个可以实现下拉刷新和加载更多功能的 ListView
。它让你在处理数据时可以自由地进行其他工作。
开始使用
感谢以下包为构建此插件做出贡献:
- get (https://pub.dev/packages/get)
- pull_to_refresh (https://pub.dev/packages/pull_to_refresh)
完整示例
以下是完整的示例代码,展示了如何使用 kmodal_listview
插件。
import 'package:flutter/material.dart';
import 'package:kmodal_listview/kmodal_listview.dart';
void main() {
runApp(MyApp());
}
///===================================
class MyApp extends StatelessWidget {
// 这个小部件是你的应用的根。
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'KModalListView'),
);
}
}
///===================================
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text(widget.title)),
body: SafeArea(
child: KListView<String>(
model: MyModal(),
options: KOptions(
loadingIcon: Container(
width: 25,
height: 25,
child: CircularProgressIndicator(color: Colors.purple),
),
),
),
),
);
}
}
///===================================
class MyModal extends KModal<String> {
@override
Widget empty({VoidCallback? retryFunction}) => Center(
child: Text('Empty Content'),
);
@override
String? get getKey => 'private_key';
@override
Widget listItem({String? data}) => Container(
color: Colors.green.shade200,
padding: const EdgeInsets.all(20),
margin: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
child: Text(
data ?? '...',
style: TextStyle(fontSize: 15, color: Colors.black87),
),
);
@override
Widget loading() =>
Center(child: CircularProgressIndicator(color: Colors.red));
@override
Future<List<String>?> request({int page = 1}) async {
if (page == 1) {
return Future.delayed(
const Duration(seconds: 3),
() => List<String>.generate(10, (index) => "ListItem $index"),
);
} else if (page == 2) {
return Future.delayed(
const Duration(seconds: 3),
() => List<String>.generate(4, (index) => "Next ListItem $index"),
);
} else {
return [];
}
}
}
代码解释
-
导入必要的包
import 'package:flutter/material.dart'; import 'package:kmodal_listview/kmodal_listview.dart';
-
创建应用根小部件
void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'KModalListView'), ); } }
-
创建主页面
class MyHomePage extends StatefulWidget { MyHomePage({Key? key, required this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: Text(widget.title)), body: SafeArea( child: KListView<String>( model: MyModal(), options: KOptions( loadingIcon: Container( width: 25, height: 25, child: CircularProgressIndicator(color: Colors.purple), ), ), ), ), ); } }
-
定义模态类
class MyModal extends KModal<String> { @override Widget empty({VoidCallback? retryFunction}) => Center( child: Text('Empty Content'), ); @override String? get getKey => 'private_key'; @override Widget listItem({String? data}) => Container( color: Colors.green.shade200, padding: const EdgeInsets.all(20), margin: const EdgeInsets.symmetric(horizontal: 10, vertical: 5), child: Text( data ?? '...', style: TextStyle(fontSize: 15, color: Colors.black87), ), ); @override Widget loading() => Center(child: CircularProgressIndicator(color: Colors.red)); @override Future<List<String>?> request({int page = 1}) async { if (page == 1) { return Future.delayed( const Duration(seconds: 3), () => List<String>.generate(10, (index) => "ListItem $index"), ); } else if (page == 2) { return Future.delayed( const Duration(seconds: 3), () => List<String>.generate(4, (index) => "Next ListItem $index"), ); } else { return []; } } }
更多关于Flutter模态列表展示插件kmodal_listview的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter模态列表展示插件kmodal_listview的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
kmodal_listview
是一个用于在 Flutter 应用中展示模态列表的插件。它允许你在应用中弹出一个模态对话框,其中包含一个可滚动的列表项。这个插件通常用于需要用户从多个选项中选择一个的场景。
安装
首先,你需要在 pubspec.yaml
文件中添加 kmodal_listview
插件的依赖:
dependencies:
flutter:
sdk: flutter
kmodal_listview: ^1.0.0 # 请确保使用最新版本
然后运行 flutter pub get
来安装依赖。
基本用法
以下是一个简单的示例,展示了如何使用 kmodal_listview
插件来展示一个模态列表:
import 'package:flutter/material.dart';
import 'package:kmodal_listview/kmodal_listview.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomeScreen(),
);
}
}
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('kmodal_listview Example'),
),
body: Center(
child: ElevatedButton(
onPressed: () {
KModalListView.showModalList(
context: context,
title: 'Choose an option',
items: [
'Option 1',
'Option 2',
'Option 3',
'Option 4',
],
onItemSelected: (index, item) {
print('Selected item: $item at index $index');
},
);
},
child: Text('Show Modal List'),
),
),
);
}
}
参数说明
context
: BuildContext,用于显示模态对话框。title
: 模态对话框的标题。items
: 列表项,通常是一个字符串列表,但也可以是任何类型的列表。onItemSelected
: 当用户选择一个列表项时触发的回调函数,返回选中的索引和项。
自定义样式
你可以通过传递额外的参数来自定义模态对话框的外观,例如背景颜色、文本样式等。
KModalListView.showModalList(
context: context,
title: 'Choose an option',
items: [
'Option 1',
'Option 2',
'Option 3',
'Option 4',
],
onItemSelected: (index, item) {
print('Selected item: $item at index $index');
},
backgroundColor: Colors.blueGrey,
textStyle: TextStyle(color: Colors.white, fontSize: 16),
);