Flutter 颤振大纲按钮:设置禁用的颜色
在我的颤振应用程序中,我有一个圆角的轮廓按钮:Flutter 颤振大纲按钮:设置禁用的颜色,flutter,button,flutter-widget,Flutter,Button,Flutter Widget,在我的颤振应用程序中,我有一个圆角的轮廓按钮: OutlinedButton( child: Text( "a label", ), onPressed: () { // do something }, style: OutlinedButton.styleFrom( primary: Colors.white, backgroundColor: MyColor.colorAccent, shape: const
OutlinedButton(
child: Text(
"a label",
),
onPressed: () {
// do something
},
style: OutlinedButton.styleFrom(
primary: Colors.white,
backgroundColor: MyColor.colorAccent,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
),
)
现在我需要为禁用状态设置按钮样式,但我不需要知道如何使用此小部件(在EevetedButton上,我使用MaterialStateProperty.resolveWith作为背景色,但它不适合OutlineButton)这不是最佳做法,但您可以这样做
bool? _isdisabled ;
//null check , if u are on an older version of dart of you want to declare it just do this :
bool _isdisabled = false;
OutlinedButton(
child: Text(
"a label",
),
onPressed: () {
// do something
},
style:_isdisabled==false? OutlinedButton.styleFrom(
primary: Colors.white,
backgroundColor: MyColor.colorAccent,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
): //another style ,
)
这不是最好的做法,但你可以这样做
bool? _isdisabled ;
//null check , if u are on an older version of dart of you want to declare it just do this :
bool _isdisabled = false;
OutlinedButton(
child: Text(
"a label",
),
onPressed: () {
// do something
},
style:_isdisabled==false? OutlinedButton.styleFrom(
primary: Colors.white,
backgroundColor: MyColor.colorAccent,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
): //another style ,
)
我不知道这个代码示例是否能帮助回答您的问题,先生
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
// This widget is the root of your application.
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
bool isEnableButton = true;
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
body: Center(
child: Container(
child: OutlinedButton(
child: Text(
"a label",
),
onPressed: () {
setState(() {
if (isEnableButton) {
isEnableButton = false;
} else {
isEnableButton = true;
}
});
},
style:
isEnableButton ? enableButtonStyle() : disableButtonStyle(),
),
),
),
),
);
}
dynamic disableButtonStyle() {
return OutlinedButton.styleFrom(
primary: Colors.black,
backgroundColor: Colors.grey,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
);
}
dynamic enableButtonStyle() {
return OutlinedButton.styleFrom(
primary: Colors.black,
backgroundColor: Colors.green,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
);
}
}
导入“包装:颤振/材料.省道”;
void main(){
runApp(MyApp());
}
类MyApp扩展了StatefulWidget{
//此小部件是应用程序的根。
@凌驾
_MyAppState createState()=>\u MyAppState();
}
类MyAppState扩展了状态{
bool isEnableButton=true;
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
),
家:脚手架(
正文:中(
子:容器(
子:大纲显示按钮(
子:文本(
“标签”,
),
已按下:(){
设置状态(){
如果(isEnableButton){
isEnableButton=false;
}否则{
isEnableButton=true;
}
});
},
风格:
isEnableButton?enableButtonStyle():disableButtonStyle(),
),
),
),
),
);
}
动态禁用按钮样式(){
返回OutlinedButton.styleFrom(
原色:颜色。黑色,
背景颜色:颜色。灰色,
形状:const RoundedRectangleBorder(
borderRadius:borderRadius.all(
圆形半径(10),
),
),
);
}
动态启用按钮样式(){
返回OutlinedButton.styleFrom(
原色:颜色。黑色,
背景颜色:Colors.green,
形状:const RoundedRectangleBorder(
borderRadius:borderRadius.all(
圆形半径(10),
),
),
);
}
}
先生,我不知道这个代码示例是否有助于回答您的问题
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
// This widget is the root of your application.
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
bool isEnableButton = true;
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
body: Center(
child: Container(
child: OutlinedButton(
child: Text(
"a label",
),
onPressed: () {
setState(() {
if (isEnableButton) {
isEnableButton = false;
} else {
isEnableButton = true;
}
});
},
style:
isEnableButton ? enableButtonStyle() : disableButtonStyle(),
),
),
),
),
);
}
dynamic disableButtonStyle() {
return OutlinedButton.styleFrom(
primary: Colors.black,
backgroundColor: Colors.grey,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
);
}
dynamic enableButtonStyle() {
return OutlinedButton.styleFrom(
primary: Colors.black,
backgroundColor: Colors.green,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(10),
),
),
);
}
}
导入“包装:颤振/材料.省道”;
void main(){
runApp(MyApp());
}
类MyApp扩展了StatefulWidget{
//此小部件是应用程序的根。
@凌驾
_MyAppState createState()=>\u MyAppState();
}
类MyAppState扩展了状态{
bool isEnableButton=true;
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
),
家:脚手架(
正文:中(
子:容器(
子:大纲显示按钮(
子:文本(
“标签”,
),
已按下:(){
设置状态(){
如果(isEnableButton){
isEnableButton=false;
}否则{
isEnableButton=true;
}
});
},
风格:
isEnableButton?enableButtonStyle():disableButtonStyle(),
),
),
),
),
);
}
动态禁用按钮样式(){
返回OutlinedButton.styleFrom(
原色:颜色。黑色,
背景颜色:颜色。灰色,
形状:const RoundedRectangleBorder(
borderRadius:borderRadius.all(
圆形半径(10),
),
),
);
}
动态启用按钮样式(){
返回OutlinedButton.styleFrom(
原色:颜色。黑色,
背景颜色:Colors.green,
形状:const RoundedRectangleBorder(
borderRadius:borderRadius.all(
圆形半径(10),
),
),
);
}
}