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
对于那些正在寻找使TextField或TextFormField只接受数字作为输入的人,尝试以下代码块:
用于flutter 1.20或更新版本
TextFormField(
controller: _controller,
keyboardType: TextInputType.number,
inputFormatters: <TextInputFormatter>[
// for below version 2 use this
FilteringTextInputFormatter.allow(RegExp(r'[0-9]')),
// for version 2 and greater youcan also use this
FilteringTextInputFormatter.digitsOnly
],
decoration: InputDecoration(
labelText: "whatever you want",
hintText: "whatever you want",
icon: Icon(Icons.phone_iphone)
)
)
对于1.20的早期版本
TextFormField(
controller: _controller,
keyboardType: TextInputType.number,
inputFormatters: <TextInputFormatter>[
WhitelistingTextInputFormatter.digitsOnly
],
decoration: InputDecoration(
labelText:"whatever you want",
hintText: "whatever you want",
icon: Icon(Icons.phone_iphone)
)
)
其他回答
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:
我需要en IntegerFormField与最小/最大的控制。最大的问题是当焦点改变时,oneditingcomplete没有被调用。以下是我的解决方案:
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:vs_dart/vs_dart.dart';
class IntegerFormField extends StatefulWidget {
final int value, min, max;
final InputDecoration decoration;
final ValueChanged<TextEditingController> onEditingComplete;
IntegerFormField({@required this.value, InputDecoration decoration, onEditingComplete, int min, int max})
: min = min ?? 0,
max = max ?? maxIntValue,
onEditingComplete = onEditingComplete ?? ((_) {}),
decoration = decoration ?? InputDecoration()
;
@override
_State createState() => _State();
}
class _State extends State<IntegerFormField> {
final TextEditingController controller = TextEditingController();
@override
void initState() {
super.initState();
controller.text = widget.value.toString();
}
@override
void dispose() {
super.dispose();
}
void onEditingComplete() {
{
try {
if (int.parse(controller.text) < widget.min)
controller.text = widget.min.toString();
else if (int.parse(controller.text) > widget.max)
controller.text = widget.max.toString();
else
FocusScope.of(context).unfocus();
} catch (e) {
controller.text = widget.value.toString();
}
widget.onEditingComplete(controller);
}
}
@override
Widget build(BuildContext context) {
return Focus(
child: TextFormField(
controller: controller,
inputFormatters: [FilteringTextInputFormatter.digitsOnly],
keyboardType: TextInputType.number,
decoration: widget.decoration,
),
onFocusChange: (value) {
if (value)
controller.selection = TextSelection(baseOffset: 0, extentOffset: controller.value.text.length);
else
onEditingComplete();
},
);
}
}
下面是数字键盘的代码: keyboardType: TextInputType。当你在文本框中添加这个代码时,它将打开数字键盘。
final _mobileFocus = new FocusNode();
final _mobile = TextEditingController();
TextFormField(
controller: _mobile,
focusNode: _mobileFocus,
maxLength: 10,
keyboardType: TextInputType.phone,
decoration: new InputDecoration(
counterText: "",
counterStyle: TextStyle(fontSize: 0),
hintText: "Mobile",
border: InputBorder.none,
hintStyle: TextStyle(
color: Colors.black,
fontSize: 15.0.
),
),
style: new TextStyle(
color: Colors.black,
fontSize: 15.0,
),
);
keyboardType: TextInputType。number会在焦点上打开一个num pad,当用户输入/经过任何其他内容时,我将清除文本字段。
keyboardType: TextInputType.number,
onChanged: (String newVal) {
if(!isNumber(newVal)) {
editingController.clear();
}
}
// Function to validate the number
bool isNumber(String value) {
if(value == null) {
return true;
}
final n = num.tryParse(value);
return n!= null;
}
仅限号码类型
keyboardType: TextInputType.number
和更多的选择与数字垫
keyboardType: TextInputType.numberWithOptions(decimal: true,signed: false)