Flutter全局刷新插件global_refresh的使用
Flutter全局刷新插件global_refresh的使用
标题
Flutter全局刷新插件global_refresh的使用
内容
基本库,用于刷新应用程序的主要状态。在进行样式或语言更改时非常有用。
使用示例
使用 GRState
而不是 State
:
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends GRState<MyHomePage> { // <-- use GRState
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: ..
);
}
}
然后刷新主要状态:
GlobalRefresh().refresh();
示例代码
import 'package:flutter/material.dart';
import 'package:global_refresh/global_refresh.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
[@override](/user/override)
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends GRState<MyHomePage> {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Container(),
);
}
}
更多关于Flutter全局刷新插件global_refresh的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter全局刷新插件global_refresh的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,global_refresh
是一个用于 Flutter 的全局刷新插件,它允许开发者在应用的不同页面间共享一个刷新状态。以下是如何在 Flutter 应用中使用 global_refresh
插件的示例代码。
首先,确保你已经在 pubspec.yaml
文件中添加了 global_refresh
依赖:
dependencies:
flutter:
sdk: flutter
global_refresh: ^x.y.z # 请替换为最新版本号
然后,运行 flutter pub get
来获取依赖。
接下来,在你的 Flutter 应用中实现全局刷新功能。以下是一个基本的示例:
主应用文件 (main.dart
)
import 'package:flutter/material.dart';
import 'package:global_refresh/global_refresh.dart';
import 'package:your_app/page_one.dart';
import 'package:your_app/page_two.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Global Refresh Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: GlobalRefreshProvider(
create: () => GlobalRefreshController(),
child: MyHomePage(),
),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final GlobalRefreshController _refreshController =
GlobalRefreshProvider.of(context)!;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Global Refresh Demo'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
ElevatedButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => PageOne()),
);
},
child: Text('Go to Page One'),
),
SizedBox(height: 20),
ElevatedButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => PageTwo()),
);
},
child: Text('Go to Page Two'),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
_refreshController.refresh();
},
tooltip: 'Trigger Global Refresh',
child: Icon(Icons.refresh),
),
);
}
}
页面一 (page_one.dart
)
import 'package:flutter/material.dart';
import 'package:global_refresh/global_refresh.dart';
class PageOne extends StatefulWidget {
@override
_PageOneState createState() => _PageOneState();
}
class _PageOneState extends State<PageOne> with GlobalRefreshListener {
@override
void initState() {
super.initState();
GlobalRefreshProvider.of(context)?.addListener(this);
}
@override
void dispose() {
GlobalRefreshProvider.of(context)?.removeListener(this);
super.dispose();
}
@override
void onRefresh() {
// 处理刷新逻辑
print('PageOne received global refresh');
// 刷新完成后调用
GlobalRefreshProvider.of(context)?.refreshCompleted();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Page One'),
),
body: Center(
child: Text('This is Page One'),
),
);
}
}
页面二 (page_two.dart
)
import 'package:flutter/material.dart';
import 'package:global_refresh/global_refresh.dart';
class PageTwo extends StatefulWidget {
@override
_PageTwoState createState() => _PageTwoState();
}
class _PageTwoState extends State<PageTwo> with GlobalRefreshListener {
@override
void initState() {
super.initState();
GlobalRefreshProvider.of(context)?.addListener(this);
}
@override
void dispose() {
GlobalRefreshProvider.of(context)?.removeListener(this);
super.dispose();
}
@override
void onRefresh() {
// 处理刷新逻辑
print('PageTwo received global refresh');
// 刷新完成后调用
GlobalRefreshProvider.of(context)?.refreshCompleted();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Page Two'),
),
body: Center(
child: Text('This is Page Two'),
),
);
}
}
在这个示例中,我们创建了一个简单的 Flutter 应用,其中包含一个主页面和两个子页面。主页面包含一个全局刷新按钮,当点击该按钮时,会触发全局刷新事件。两个子页面都实现了 GlobalRefreshListener
接口,并在收到全局刷新事件时执行相应的刷新逻辑。
请根据你的实际需求调整代码,比如添加具体的刷新逻辑(如从服务器获取数据)。