我正在使用Flutter ElevatedButton,建议在文档中的RaisedButton上使用。
在凸起按钮中,您可以指定和disableColor。在ElevatedButton中,我不能。
如何禁用ElevatedButton的外观?
您可以在下面复制粘贴运行完整代码
可以使用ButtonStyle
并检查所需的states.contains(MaterialState.disabled)
返回颜色
在演示代码中,禁用的颜色为绿色
代码段
ElevatedButton(
onPressed: null,
child: Text('Submit disable'),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.resolveWith<Color>(
(Set<MaterialState> states) {
if (states.contains(MaterialState.pressed))
return Theme.of(context)
.colorScheme
.primary
.withOpacity(0.5);
else if (states.contains(MaterialState.disabled))
return Colors.green;
return null; // Use the component's default.
},
),
),
),
工作演示
完整的代码
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
ElevatedButton(
onPressed: null,
child: Text('Submit disable'),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.resolveWith<Color>(
(Set<MaterialState> states) {
if (states.contains(MaterialState.pressed))
return Theme.of(context)
.colorScheme
.primary
.withOpacity(0.5);
else if (states.contains(MaterialState.disabled))
return Colors.green;
return null; // Use the component's default.
},
),
),
),
ElevatedButton(
onPressed: () {
print("clicked");
},
child: Text('Submit enable'),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.resolveWith<Color>(
(Set<MaterialState> states) {
if (states.contains(MaterialState.pressed))
return Theme.of(context)
.colorScheme
.primary
.withOpacity(0.5);
else if (states.contains(MaterialState.disabled))
return Colors.green;
return null; // Use the component's default./ Use the component's default.
},
),
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句