如何在文本字段颤动中删除 suffixIcon 的填充
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【中文标题】如何在文本字段颤动中删除 suffixIcon 的填充【英文标题】:How to remove padding of suffixIcon in textfield flutter 【发布时间】:2021-05-22 02:53:51 【问题描述】:我有一个创建文本字段的函数
Widget _createNormalTextField(
String hintTxt,
TextEditingController controller,
TextInputType inputType,
String Function(String) validation,
Function(String) onTextChanged,
int length,
Widget suffixIcon)
return Container(
margin: EdgeInsets.symmetric(vertical: 8),
child: new TextFormField(
controller: controller,
maxLength: length,
keyboardType: inputType,
validator: validation,
onChanged: onTextChanged,
decoration: InputDecoration(
contentPadding: EdgeInsets.only(bottom: -10.0),
suffixIcon: suffixIcon,
hintText: hintTxt,
)),
);
我正在创建几个这样的文本字段:
Column(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Expanded(flex: 2, child: Text("Discount")),
SizedBox(
width: 4,
),
Expanded(
flex: 1,
child: _createNormalTextField(
"", _discountPercentController, TextInputType.number, null,
(txt)
setState(()
calculateAmount(txt);
);
, 2, Text("%")),
),
SizedBox(
width: 4,
),
Expanded(
flex: 2,
child: _createNormalTextField(
"Amount",
_discountAmountController,
TextInputType.number,
null,
(txt) ,
5,
null),
),
],
),
],
);
我使用 '%' 文本作为后缀图标。但它会在中间创建 '%' 并采用我不想要的填充。 我附上了我得到的和我想要的图片:
我明白了:
我想要右下角的后缀图标,比如::
那么有人知道解决方法吗??
【问题讨论】:
【参考方案1】:您可以在下面复制粘贴运行完整代码
您可以将suffixIcon
与suffixIconConstraints
一起使用
代码sn-p
decoration: InputDecoration(
contentPadding: EdgeInsets.only(bottom: -10.0),
suffixIcon: suffixIcon,
suffixIconConstraints: BoxConstraints(maxHeight: 14),
hintText: hintTxt,
)),
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,
),
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>
TextEditingController _discountPercentController = TextEditingController();
TextEditingController _discountAmountController = TextEditingController();
Widget _createNormalTextField(
String hintTxt,
TextEditingController controller,
TextInputType inputType,
String Function(String) validation,
Function(String) onTextChanged,
int length,
Widget suffixIcon)
return Container(
margin: EdgeInsets.symmetric(vertical: 8),
child: TextFormField(
controller: controller,
maxLength: length,
keyboardType: inputType,
validator: validation,
onChanged: onTextChanged,
decoration: InputDecoration(
contentPadding: EdgeInsets.only(bottom: -10.0),
suffixIcon: suffixIcon,
suffixIconConstraints: BoxConstraints(maxHeight: 14),
hintText: hintTxt,
)),
);
@override
Widget build(BuildContext context)
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Expanded(flex: 2, child: Text("Discount")),
SizedBox(
width: 4,
),
Expanded(
flex: 1,
child: _createNormalTextField("", _discountPercentController,
TextInputType.number, null, (txt)
setState(()
//calculateAmount(txt);
);
, 2, Text("%")),
),
SizedBox(
width: 4,
),
Expanded(
flex: 2,
child: _createNormalTextField(
"Amount",
_discountAmountController,
TextInputType.number,
null,
(txt) ,
5,
null),
),
],
),
],
)));
【讨论】:
它可以工作,但是只有在选择文本字段时才会显示后缀,有什么解决方法吗? 我已经更新了我的答案,你仍然可以使用 suffixIcon 并添加 suffixIconConstraints: BoxConstraints(maxHeight: 14)以上是关于如何在文本字段颤动中删除 suffixIcon 的填充的主要内容,如果未能解决你的问题,请参考以下文章