新增點按漣漪效果 (Material Design)
當我們在開發遵循 Material Design 規範應用的時候,我們可能會需要為某個 widgets 的點選加入漣漪效果。
Flutter 提供了 InkWell
widget 來實現這個功能。你可以透過以下步驟實現漣漪效果:
-
建立一個想要點選的 widget;
-
用
InkWell
widget 包裹它,並設定回呼函式,就可以顯示漣漪動畫了。
// The InkWell wraps the custom flat button widget.
InkWell(
// When the user taps the button, show a snackbar.
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
content: Text('Tap'),
));
},
child: const Padding(
padding: EdgeInsets.all(12),
child: Text('Flat Button'),
),
)
互動式範例
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
const title = 'InkWell Demo';
return const MaterialApp(
title: title,
home: MyHomePage(title: title),
);
}
}
class MyHomePage extends StatelessWidget {
final String title;
const MyHomePage({super.key, required this.title});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: const Center(
child: MyButton(),
),
);
}
}
class MyButton extends StatelessWidget {
const MyButton({super.key});
@override
Widget build(BuildContext context) {
// The InkWell wraps the custom flat button widget.
return InkWell(
// When the user taps the button, show a snackbar.
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
content: Text('Tap'),
));
},
child: const Padding(
padding: EdgeInsets.all(12),
child: Text('Flat Button'),
),
);
}
}