Flutter扩展图标按钮插件icon_button_extended的使用
Flutter扩展图标按钮插件icon_button_extended的使用
特性
在[IconButton]
上添加了onLongPress
和onLongHold
功能。
使用方法
要使用icon_button_extended
插件,首先需要将其添加到项目的pubspec.yaml
文件中。然后,您可以检查示例应用以获取更多信息。
示例代码
import 'package:flutter/material.dart';
import 'package:icon_button_extended/icon_button_extended.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const ExamplePage(),
);
}
}
class ExamplePage extends StatefulWidget {
const ExamplePage({super.key});
@override
State<ExamplePage> createState() => _ExamplePageState();
}
class _ExamplePageState extends State<ExamplePage> {
int _counter = 0;
final Duration _debounce = const Duration(milliseconds: 200);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Example Page'),
),
body: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
/// 图标按钮
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
IconButtonExtended(
longHoldDebounce: _debounce,
color: Colors.red.shade300,
iconSize: 52,
icon: const Icon(Icons.remove_circle),
onPressed: _decrement,
onLongHold: _decrement,
onLongPress: _decrement,
),
IconButtonExtended(
longHoldDebounce: _debounce,
color: Colors.green.shade300,
iconSize: 52,
icon: const Icon(Icons.add_circle),
onPressed: _increment,
onLongHold: _increment,
onLongPress: _increment,
),
],
),
const SizedBox(height: 12),
/// 计数器
Text(
'Counter: $_counter',
style: TextStyle(
fontSize: 24,
color: Theme.of(context).colorScheme.primary,
),
),
],
),
),
);
}
void _increment() {
setState(() {
_counter++;
});
}
void _decrement() {
setState(() {
_counter--;
});
}
}
解释
-
导入包:
import 'package:flutter/material.dart'; import 'package:icon_button_extended/icon_button_extended.dart';
-
创建主应用类:
class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple), useMaterial3: true, ), home: const ExamplePage(), ); } }
-
创建状态管理类:
class ExamplePage extends StatefulWidget { const ExamplePage({super.key}); @override State<ExamplePage> createState() => _ExamplePageState(); } class _ExamplePageState extends State<ExamplePage> { int _counter = 0; final Duration _debounce = const Duration(milliseconds: 200); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('Example Page'), ), body: Center( child: Column( mainAxisSize: MainAxisSize.min, children: [ /// 图标按钮 Row( mainAxisAlignment: MainAxisAlignment.center, children: [ IconButtonExtended( longHoldDebounce: _debounce, color: Colors.red.shade300, iconSize: 52, icon: const Icon(Icons.remove_circle), onPressed: _decrement, onLongHold: _decrement, onLongPress: _decrement, ), IconButtonExtended( longHoldDebounce: _debounce, color: Colors.green.shade300, iconSize: 52, icon: const Icon(Icons.add_circle), onPressed: _increment, onLongHold: _increment, onLongPress: _increment, ), ], ), const SizedBox(height: 12), /// 计数器 Text( 'Counter: $_counter', style: TextStyle( fontSize: 24, color: Theme.of(context).colorScheme.primary, ), ), ], ), ), ); } void _increment() { setState(() { _counter++; }); } void _decrement() { setState(() { _counter--; }); } }
更多关于Flutter扩展图标按钮插件icon_button_extended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扩展图标按钮插件icon_button_extended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,下面是一个关于如何使用 icon_button_extended
插件在 Flutter 中创建扩展图标按钮的示例代码。icon_button_extended
是一个流行的 Flutter 插件,它提供了更多自定义选项的图标按钮。
首先,确保你的 pubspec.yaml
文件中已经包含了 icon_button_extended
依赖项:
dependencies:
flutter:
sdk: flutter
icon_button_extended: ^x.y.z # 请替换为最新版本号
然后运行 flutter pub get
来获取依赖项。
以下是一个完整的 Flutter 应用示例,展示了如何使用 IconButtonExtended
:
import 'package:flutter/material.dart';
import 'package:icon_button_extended/icon_button_extended.dart';
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(),
);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('IconButtonExtended Demo'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
IconButtonExtended(
icon: Icon(Icons.add),
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text('Add button pressed')),
);
},
iconSize: 30,
padding: EdgeInsets.all(15),
color: Colors.blue,
iconColor: Colors.white,
borderRadius: BorderRadius.circular(20),
),
SizedBox(height: 20),
IconButtonExtended(
icon: Icon(Icons.delete),
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text('Delete button pressed')),
);
},
iconSize: 25,
padding: EdgeInsets.symmetric(horizontal: 20, vertical: 10),
backgroundColor: Colors.red,
iconColor: Colors.white,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15),
),
),
],
),
),
);
}
}
在这个示例中,我们创建了两个 IconButtonExtended
按钮,分别用于添加和删除操作。每个按钮都有不同的图标大小、内边距、颜色和形状。
icon
属性用于设置按钮的图标。onPressed
属性用于设置按钮点击时的回调函数。iconSize
属性用于设置图标的大小。padding
属性用于设置按钮的内边距。color
和backgroundColor
属性用于设置按钮的背景颜色(注意:color
属性在较新版本中可能已经被弃用,建议使用backgroundColor
)。iconColor
属性用于设置图标的颜色。borderRadius
和shape
属性用于设置按钮的形状和圆角。
这个示例展示了如何使用 icon_button_extended
插件来创建高度自定义的图标按钮。你可以根据需要进一步调整这些属性来满足你的应用需求。