Flutter 无法在错误边框TextFormField中填充颜色
我正在努力实现这一点,但没有办法定制错误边界,错误边界没有选择填充 这是我的TexFormField和InputEdition:Flutter 无法在错误边框TextFormField中填充颜色,flutter,flutter-layout,Flutter,Flutter Layout,我正在努力实现这一点,但没有办法定制错误边界,错误边界没有选择填充 这是我的TexFormField和InputEdition: TextFormField( controller: TextEditingController(), style: Theme.of(context).textTheme.subtitle2, decoration: CustomDecoration.inputFilledDecoration(contex
TextFormField(
controller: TextEditingController(),
style: Theme.of(context).textTheme.subtitle2,
decoration: CustomDecoration.inputFilledDecoration(context, hint),
onSaved: onSaved,
validator: isRequired ? _exists : null),);
InputDecoration inputFilledDecoration(BuildContext context, String hint) =>
InputDecoration(
border: InputBorder.none,
contentPadding: EdgeInsets.symmetric(horizontal: PaddingMetric.inputHorizontal,
vertical: PaddingMetric.inputVertical),
disabledBorder: InputBorder.none,
enabledBorder: InputBorder.none,
fillColor: Theme.of(context).dividerColor,
filled: true,
focusedBorder: OutlineInputBorder(borderSide: BorderSide(width: 1)),
isDense: false,
labelText: hint );
我认为唯一的方法是提供一个自定义逻辑,并设置一个不同的装饰,以防出现问题或错误。 我已经做了一个小代码,也许它可以帮助;如果您将字段留空,然后按submit,则文本字段中会出现红色:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final appTitle = 'Form Validation Demo';
return MaterialApp(
title: appTitle,
home: Scaffold(
appBar: AppBar(
title: Text(appTitle),
),
body: MyCustomForm(),
),
);
}
}
class MyCustomForm extends StatefulWidget {
@override
MyCustomFormState createState() => MyCustomFormState();
}
class MyCustomFormState extends State<MyCustomForm> {
final _formKey = GlobalKey<FormState>();
bool isError = false;
InputDecoration ok(BuildContext context, String hint) =>
InputDecoration(
border: InputBorder.none,
disabledBorder: InputBorder.none,
enabledBorder: InputBorder.none,
fillColor: Colors.green,
filled: true,
focusedBorder: OutlineInputBorder(borderSide: BorderSide(width: 1)),
isDense: false,
labelText: hint );
InputDecoration err(BuildContext context, String hint) =>
InputDecoration(
border: InputBorder.none,
disabledBorder: InputBorder.none,
enabledBorder: InputBorder.none,
fillColor: Colors.red,
filled: true,
focusedBorder: OutlineInputBorder(borderSide: BorderSide(width: 1)),
isDense: false,
labelText: hint );
@override
Widget build(BuildContext context) {
// Build a Form widget using the _formKey created above.
return Form(
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
TextFormField(
decoration: isError ? err(context,"err") : ok(context,"ok"),
validator: (value) {
if (value.isEmpty) {
return 'Please enter some text';
}
return null;
},
),
Padding(
padding: const EdgeInsets.symmetric(vertical: 16.0),
child: RaisedButton(
onPressed: () {
// Validate returns true if the form is valid, or false
// otherwise.
if (_formKey.currentState.validate()) {
setState(() { isError = false; });
}
else {
setState(() { isError = true; });
}
},
child: Text('Submit'),
),
),
],
),
);
}
}
导入“包装:颤振/材料.省道”;
void main()=>runApp(MyApp());
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
最终appTitle='表单验证演示';
返回材料PP(
标题:appTitle,
家:脚手架(
appBar:appBar(
标题:文本(appTitle),
),
正文:MyCustomForm(),
),
);
}
}
类MyCustomForm扩展了StatefulWidget{
@凌驾
MyCustomFormState createState()=>MyCustomFormState();
}
类MyCustomFormState扩展了状态{
final _formKey=GlobalKey();
bool-isError=false;
InputDecoration ok(BuildContext上下文,字符串提示)=>
输入装饰(
边框:InputBorder.none,
disabledBorder:InputBorder.none,
enabledBorder:InputBorder.none,
fillColor:Colors.green,
是的,
FocusedOrder:OutlineInputBorder(borderSide:borderSide(宽度:1)),
isDense:错,
标签文本:提示);
InputDecoration错误(BuildContext上下文,字符串提示)=>
输入装饰(
边框:InputBorder.none,
disabledBorder:InputBorder.none,
enabledBorder:InputBorder.none,
fillColor:Colors.red,
是的,
FocusedOrder:OutlineInputBorder(borderSide:borderSide(宽度:1)),
isDense:错,
标签文本:提示);
@凌驾
小部件构建(构建上下文){
//使用上面创建的_formKey构建表单小部件。
报税表(
键:_formKey,
子:列(
crossAxisAlignment:crossAxisAlignment.start,
儿童:[
TextFormField(
装饰:isError?err(上下文,“err”):ok(上下文,“ok”),
验证器:(值){
if(value.isEmpty){
返回“请输入一些文本”;
}
返回null;
},
),
填充物(
填充:常量边集。对称(垂直:16.0),
孩子:升起按钮(
已按下:(){
//如果表单有效,则Validate返回true,否则返回false
//否则。
if(_formKey.currentState.validate()){
setState((){isError=false;});
}
否则{
setState((){isError=true;});
}
},
子项:文本('Submit'),
),
),
],
),
);
}
}
我认为唯一的方法是提供一个自定义逻辑并设置一个不同的装饰,以防它正常或出现错误。
我已经做了一个小代码,也许它可以帮助;如果您将字段留空,然后按submit,则文本字段中会出现红色:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final appTitle = 'Form Validation Demo';
return MaterialApp(
title: appTitle,
home: Scaffold(
appBar: AppBar(
title: Text(appTitle),
),
body: MyCustomForm(),
),
);
}
}
class MyCustomForm extends StatefulWidget {
@override
MyCustomFormState createState() => MyCustomFormState();
}
class MyCustomFormState extends State<MyCustomForm> {
final _formKey = GlobalKey<FormState>();
bool isError = false;
InputDecoration ok(BuildContext context, String hint) =>
InputDecoration(
border: InputBorder.none,
disabledBorder: InputBorder.none,
enabledBorder: InputBorder.none,
fillColor: Colors.green,
filled: true,
focusedBorder: OutlineInputBorder(borderSide: BorderSide(width: 1)),
isDense: false,
labelText: hint );
InputDecoration err(BuildContext context, String hint) =>
InputDecoration(
border: InputBorder.none,
disabledBorder: InputBorder.none,
enabledBorder: InputBorder.none,
fillColor: Colors.red,
filled: true,
focusedBorder: OutlineInputBorder(borderSide: BorderSide(width: 1)),
isDense: false,
labelText: hint );
@override
Widget build(BuildContext context) {
// Build a Form widget using the _formKey created above.
return Form(
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
TextFormField(
decoration: isError ? err(context,"err") : ok(context,"ok"),
validator: (value) {
if (value.isEmpty) {
return 'Please enter some text';
}
return null;
},
),
Padding(
padding: const EdgeInsets.symmetric(vertical: 16.0),
child: RaisedButton(
onPressed: () {
// Validate returns true if the form is valid, or false
// otherwise.
if (_formKey.currentState.validate()) {
setState(() { isError = false; });
}
else {
setState(() { isError = true; });
}
},
child: Text('Submit'),
),
),
],
),
);
}
}
导入“包装:颤振/材料.省道”;
void main()=>runApp(MyApp());
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
最终appTitle='表单验证演示';
返回材料PP(
标题:appTitle,
家:脚手架(
appBar:appBar(
标题:文本(appTitle),
),
正文:MyCustomForm(),
),
);
}
}
类MyCustomForm扩展了StatefulWidget{
@凌驾
MyCustomFormState createState()=>MyCustomFormState();
}
类MyCustomFormState扩展了状态{
final _formKey=GlobalKey();
bool-isError=false;
InputDecoration ok(BuildContext上下文,字符串提示)=>
输入装饰(
边框:InputBorder.none,
disabledBorder:InputBorder.none,
enabledBorder:InputBorder.none,
fillColor:Colors.green,
是的,
FocusedOrder:OutlineInputBorder(borderSide:borderSide(宽度:1)),
isDense:错,
标签文本:提示);
InputDecoration错误(BuildContext上下文,字符串提示)=>
输入装饰(
边框:InputBorder.none,
disabledBorder:InputBorder.none,
enabledBorder:InputBorder.none,
fillColor:Colors.red,
是的,
FocusedOrder:OutlineInputBorder(borderSide:borderSide(宽度:1)),
isDense:错,
标签文本:提示);
@凌驾
小部件构建(构建上下文){
//使用上面创建的_formKey构建表单小部件。
报税表(
键:_formKey,
子:列(
crossAxisAlignment:crossAxisAlignment.start,
儿童:[
TextFormField(
装饰:isError?err(上下文,“err”):ok(上下文,“ok”),
验证器:(值){
if(value.isEmpty){
返回“请输入一些文本”;
}
返回null;
},
),
填充物(
填充:常量边集。对称(垂直:16.0),
孩子:升起按钮(
已按下:(){
//如果表单有效,则Validate返回true,否则返回false
//否则。
if(_formKey.currentState.validate()){
setState((){isError=false;});
}
否则{
setState((){isError=true;});
}
},
子项:文本('Submit'),
),
),
],
),
);
}
}
有你需要的吗?有你需要的吗?