import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: SafeArea(
child: Scaffold(
body: Column(
children: [
Container(
color: Colors.orange,
child: TextField(
decoration: InputDecoration(
suffix: IconButton(
icon: Icon(Icons.check_circle),
onPressed: () {
print('222');
}),
),
),
),
],
),
),
),
);
}
}
如何强制 check_circle 图标自动调整大小以匹配实际TextField的高度,即其光标高度?
答案 0 :(得分:1)
使用了Stack
Stack(
children: [
TextField(),
Positioned.fill(
right: 10,
child: Align(
alignment: Alignment.centerRight,
child: InkWell(
onTap: () {
searchController.clear();
},
child: Icon(Icons.clear))))
],
),
答案 1 :(得分:0)
改为使用suffixIcon
。
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: SafeArea(
child: Scaffold(
body: Column(
children: [
Container(
color: Colors.orange,
child: TextField(
decoration: InputDecoration(
suffixIcon: IconButton(
icon: Icon(Icons.check_circle),
onPressed: () {
print('222');
}),
),
),
),
],
),
),
),
);
}
}
答案 2 :(得分:0)
很好的问题...
最基本的方法是重置TextField中的所有填充,而不使用IconButton(因为所有Material组件都具有无法修改的预定义和内部填充)。
似乎后缀的基线与文本对齐,从而防止了材质墨水的交互,而后缀图标在文本区域中正确居中,但BUT会将墨水传播到TextField。 因此,到目前为止,我还找不到合适的方法,也许我缺少一个小部件/逻辑。
检查底部的屏幕截图,该屏幕截图显示了为什么后缀不能位于文本本身,因为后缀位于基线本身内,并且插入符号会产生更大的高度.....
在前两个文本字段中,“灰色”框是后缀,黄色是suffixIcon(正确居中)。
解决方案1:(在截图中为红色背景,带有2个复选框) 如果可以(在设计方面),排成一行,然后放置TextField和图标:
var inputBorderDecoration = OutlineInputBorder(
borderRadius: BorderRadius.zero,
borderSide: BorderSide(width: 1, color: Colors.black));
double textHeight = 40;
// define a width if you want, or let the constrains of the parent define it.
double inputWidth = double.infinity;
return Center(
child: Container(
width: inputWidth,
height: textHeight,
color: Colors.green.withOpacity(.2),
child: Row(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Flexible(
child: TextField(
controller: TextEditingController(text: 'hello world'),
style: TextStyle(fontSize: textHeight),
decoration: InputDecoration(
contentPadding: EdgeInsets.zero,
enabledBorder: inputBorderDecoration,
focusedBorder: inputBorderDecoration,
filled: true,
fillColor: Colors.red.withOpacity(.5),
),
),
),
FittedBox(
child: InkWell(
onTap: () => print("touch button"),
child: Icon(Icons.check_circle),
),
),
],
)),
);
解决方案2:(在屏幕截图中,最后一个文本字段中,带有白色图标的绿色框) 包装图标修饰是更好的UI方法,但是TextField仍将接收触摸事件。
var inputBorderDecoration = OutlineInputBorder(
borderRadius: BorderRadius.zero,
borderSide: BorderSide(width: 1, color: Colors.black));
double fontSize = 24;
return GestureDetector(
onTap: () {
FocusScope.of(context).requestFocus(FocusNode());
},
child: Container(
color: Colors.green.shade50,
child: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Container(
width: 300,
height: fontSize,
color: Colors.orange,
child: TextField(
style: TextStyle(fontSize: fontSize, color: Colors.white),
decoration: InputDecoration(
fillColor: Colors.purple.withOpacity(.5),
filled: true,
border: inputBorderDecoration,
focusedBorder: inputBorderDecoration,
enabledBorder: inputBorderDecoration,
contentPadding: EdgeInsets.zero,
suffixIcon: GestureDetector(
onTap: () => print('on tap'),
child: Container(
color: Colors.green,
child: FittedBox(
alignment: Alignment.center,
fit: BoxFit.fitHeight,
child: IconTheme(
data: IconThemeData(),
child: Icon(
Icons.check_circle,
color: Colors.white,
),
),
),
),
),
),
),
),
],
),
),
),
);
解决方案3:
自己构建装饰