Flutter TextFormField的后缀图标存在问题
我有一个带有后缀图标的Flutter TextFormField的后缀图标存在问题,flutter,Flutter,我有一个带有后缀图标的TextFormField,用作IconButton: TextFormField( autocorrect: false, decoration: InputDecoration( prefixIcon: widget.icon, isDense: true, suffixIcon: IconButton( icon: Icon(Icons.clear), onPressed: () {...}
TextFormField
,用作IconButton
:
TextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: widget.icon,
isDense: true,
suffixIcon: IconButton(
icon: Icon(Icons.clear),
onPressed: () {...}
)
),
controller: _controller,
maxLines: null,
)
我的问题是,后缀图标增加了文本字段的高度:
(此外,文本结尾和图标之间的空间过大):
我尝试了不同的方法来避免这种情况,但几乎所有的方法都失败了。最后,我在这里找到了一个可能的解决方案:
因此,我尝试使用一个IntrinsicHeight
小部件,如前所述:
IntrinsicHeight(
child: TextFormField(...)
)
事实上,它规范化了我的TextFormField
的高度,但现在有了换行符/换行符:
如您所见,多行调整不再正常工作,它几乎无法确定何时展开
那么:你知道如何解决我最初关于后缀图标和结果文本字段高度的问题吗?或者您现在知道如何解决使用
IntrisicHeight
时的多行问题了吗?您可以在下面复制粘贴运行完整代码步骤1:您可以使用
后缀约束
来减少填充步骤2:使用
InkWell
wrapIcon
并设置Icon
sizeTextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: Icon(Icons.add),
prefixIconConstraints: BoxConstraints(
minWidth: 5,
minHeight: 5,
),
isDense: true,
suffixIconConstraints: BoxConstraints(
minWidth: 2,
minHeight: 2,
),
suffixIcon: InkWell(
child: Icon(Icons.clear, size: 14), onTap: () {})),
controller: _controller1,
maxLines: null,
),
工作演示
完整代码
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;
TextEditingController myController1 = TextEditingController();
TextEditingController _controller1 = TextEditingController();
TextEditingController _controller2 = TextEditingController();
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: TextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: Icon(Icons.add),
prefixIconConstraints: BoxConstraints(
minWidth: 5,
minHeight: 5,
),
isDense: true,
suffixIconConstraints: BoxConstraints(
minWidth: 2,
minHeight: 2,
),
suffixIcon: InkWell(
child: Icon(Icons.clear, size: 14), onTap: () {})),
controller: _controller1,
maxLines: null,
),
),
Expanded(
child: TextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: Icon(Icons.add),
prefixIconConstraints: BoxConstraints(
minWidth: 5,
minHeight: 5,
),
isDense: true,
suffixIconConstraints: BoxConstraints(
minWidth: 2,
minHeight: 2,
),
suffixIcon: InkWell(
child: Icon(Icons.clear, size: 14), onTap: () {})),
controller: _controller2,
maxLines: null,
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
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){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
视觉密度:视觉密度。自适应平台密度,
),
主页:MyHomePage(标题:“颤振演示主页”),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
int _计数器=0;
TextEditingController myController1=TextEditingController();
TextEditingController _controller1=TextEditingController();
TextEditingController _controller2=TextEditingController();
void _incrementCounter(){
设置状态(){
_计数器++;
});
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(widget.title),
),
正文:中(
孩子:排(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
扩大(
子项:TextFormField(
自动更正:错误,
装饰:输入装饰(
前缀:图标(Icons.add),
prefixIconConstraints:BoxConstraints(
最小宽度:5,
身高:5,,
),
是的,
后缀约束:BoxConstraints(
最小宽度:2,
身高:2,,
),
墨水井(
子:图标(Icons.clear,大小:14),onTap:({})),
控制器:_控制器1,
maxLines:null,
),
),
扩大(
子项:TextFormField(
自动更正:错误,
装饰:输入装饰(
前缀:图标(Icons.add),
prefixIconConstraints:BoxConstraints(
最小宽度:5,
身高:5,,
),
是的,
后缀约束:BoxConstraints(
最小宽度:2,
身高:2,,
),
墨水井(
子:图标(Icons.clear,大小:14),onTap:({})),
控制器:_控制器2,
maxLines:null,
),
),
],
),
),
浮动操作按钮:浮动操作按钮(
按下时:\ u递增计数器,
工具提示:“增量”,
子:图标(Icons.add),
),
);
}
}
您可以复制粘贴运行下面的完整代码步骤1:您可以使用
后缀约束
来减少填充步骤2:使用
InkWell
wrapIcon
并设置Icon
sizeTextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: Icon(Icons.add),
prefixIconConstraints: BoxConstraints(
minWidth: 5,
minHeight: 5,
),
isDense: true,
suffixIconConstraints: BoxConstraints(
minWidth: 2,
minHeight: 2,
),
suffixIcon: InkWell(
child: Icon(Icons.clear, size: 14), onTap: () {})),
controller: _controller1,
maxLines: null,
),
工作演示
完整代码
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;
TextEditingController myController1 = TextEditingController();
TextEditingController _controller1 = TextEditingController();
TextEditingController _controller2 = TextEditingController();
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: TextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: Icon(Icons.add),
prefixIconConstraints: BoxConstraints(
minWidth: 5,
minHeight: 5,
),
isDense: true,
suffixIconConstraints: BoxConstraints(
minWidth: 2,
minHeight: 2,
),
suffixIcon: InkWell(
child: Icon(Icons.clear, size: 14), onTap: () {})),
controller: _controller1,
maxLines: null,
),
),
Expanded(
child: TextFormField(
autocorrect: false,
decoration: InputDecoration(
prefixIcon: Icon(Icons.add),
prefixIconConstraints: BoxConstraints(
minWidth: 5,
minHeight: 5,
),
isDense: true,
suffixIconConstraints: BoxConstraints(
minWidth: 2,
minHeight: 2,
),
suffixIcon: InkWell(
child: Icon(Icons.clear, size: 14), onTap: () {})),
controller: _controller2,
maxLines: null,
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
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){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
视觉密度:视觉密度。自适应平台密度,
),
主页:MyHomePage(标题:“颤振演示主页”),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
int _计数器=0;
TextEditingController myController1=TextEditingController();
TextEditingController _controller1=TextEditingController();
TextEditingController _controller2=TextEditingController();
void _incrementCounter(){
设置状态(){
_计数器++;
});
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(widget.title),
),
正文:中(
孩子:排(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
扩大(
子项:TextFormField(
自动更正:错误,
装饰:输入装饰(
前缀:图标(Icons.add),
prefixIconConstraints:BoxConstraints(
最小宽度:5,
身高:5,,
),