我无法找到一种方法来创建一个输入字段颤振,将打开一个数字键盘,应该采取数字输入。这是可能的颤振材料部件?一些GitHub讨论似乎表明这是一个受支持的功能,但我无法找到任何关于它的文档。
当前回答
通过这个选项,你可以严格限制另一个字符的数字。
inputFormatters: [WhitelistingTextInputFormatter.digitsOnly],
keyboardType: TextInputType.number,
使用上述选项,您必须导入此
import 'package:flutter/services.dart';
使用这种选项,用户不能在文本框中粘贴字符
其他回答
TextField小部件需要设置keyboardType: 和inputFormatters: <TextInputFormatter>[FilteringTextInputFormatter。digitsOnly]只接受数字作为输入。
TextField(
keyboardType: TextInputType.number,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.digitsOnly
], // Only numbers can be entered
),
在DartPad中的例子
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomePage(),
theme: ThemeData(primarySwatch: Colors.blue),
);
}
}
class HomePage extends StatefulWidget {
@override
State<StatefulWidget> createState() {
return HomePageState();
}
}
class HomePageState extends State<HomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
body: Container(
padding: const EdgeInsets.all(40.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text("This Input accepts Numbers only"),
SizedBox(height: 20),
TextField(
decoration: InputDecoration(
focusedBorder: OutlineInputBorder(
borderSide:
BorderSide(color: Colors.greenAccent, width: 5.0),
),
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.red, width: 5.0),
),
hintText: 'Mobile Number',
),
keyboardType: TextInputType.number,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.digitsOnly
], // Only numbers can be entered
),
SizedBox(height: 20),
Text("You can test be Typing"),
],
)),
);
}
}
TextField(
controller: _controller,
keyboardType: TextInputType.number,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(RegExp(r'[0.0-9.9]')),
])
你需要加一条线
keyboardType: TextInputType.phone,
在块“TextFormField”。在下面的例子:
TextField(
controller: _controller,
keyboardType: TextInputType.phone,
),
它应该是这样的:
通过这个选项,你可以严格限制另一个字符的数字。
inputFormatters: [WhitelistingTextInputFormatter.digitsOnly],
keyboardType: TextInputType.number,
使用上述选项,您必须导入此
import 'package:flutter/services.dart';
使用这种选项,用户不能在文本框中粘贴字符
下面是Android上实际的手机键盘代码:
按键部分:keyboardType: TextInputType.phone,
TextFormField(
style: TextStyle(
fontSize: 24
),
controller: _phoneNumberController,
keyboardType: TextInputType.phone,
decoration: InputDecoration(
prefixText: "+1 ",
labelText: 'Phone number'),
validator: (String value) {
if (value.isEmpty) {
return 'Phone number (+x xxx-xxx-xxxx)';
}
return null;
},
),