[英]Make a TextFormField global widget in flutter
我正在為應用程序制作一個全局 TextFormField 小部件。 但它沒有返回 controller 中的數據。 我的全局文本表單字段小部件:請告訴我我做錯了什么。 我正在注冊人員小部件中初始化 controller。 我還想驗證驗證器中的文本表單字段。
import 'package:flutter/material.dart';
class GlobalTextField extends StatelessWidget {
final Widget fieldIcon;
final String fieldText;
final TextEditingController fieldController;
final bool isEnabled;
const GlobalTextField(
this.fieldIcon,
this.fieldText,
this.fieldController, [
this.isEnabled,
]);
@override
Widget build(BuildContext context) {
return TextFormField(
controller: fieldController,
enabled: isEnabled ?? true,
decoration: InputDecoration(
hintText: fieldText,
prefixIcon: fieldIcon,
hintStyle: TextStyle(color: Colors.grey),
filled: true,
fillColor: Colors.white70,
enabledBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Color.fromRGBO(198, 57, 93, 1)),
),
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Color.fromRGBO(198, 57, 93, 1)),
),
),
cursorColor: Color.fromRGBO(198, 57, 93, 1),
);
}
}
我像這樣使用它
import 'package:flutter/material.dart';
import 'package:neighbourhood_watch/ui/widgets/button_global.dart';
import 'package:neighbourhood_watch/ui/widgets/textfield_global.dart';
import 'package:neighbourhood_watch/widgets/user_image_picker.dart';
import 'dart:io';
class SignUpPerson extends StatefulWidget {
@override
_SignUpPersonState createState() => _SignUpPersonState();
}
class _SignUpPersonState extends State<SignUpPerson> {
TextEditingController username = new TextEditingController();
TextEditingController description = new TextEditingController();
TextEditingController contact = new TextEditingController();
TextEditingController password = new TextEditingController();
TextEditingController area = new TextEditingController();
TextEditingController email = new TextEditingController();
final _formKey = GlobalKey<FormState>();
File _userImageFile;
void _pickedImage(File image) {
_userImageFile = image;
}
@override
Widget build(BuildContext context) {
double width = MediaQuery.of(context).size.width;
double height = MediaQuery.of(context).size.height;
return Scaffold(
backgroundColor: Colors.white,
body: SafeArea(
child: Container(
height: height,
width: width,
child: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
height: height * 0.05,
width: width,
),
Container(
height: height * 0.25,
width: width,
child: Image.asset(
'assets/images/nhwlogo_global.png',
fit: BoxFit.contain,
),
),
Text(
'Create an Account',
style: TextStyle(
fontSize: 22,
fontWeight: FontWeight.bold,
),
),
SizedBox(
height: 30.0,
),
Container(
height: height * 0.12,
width: width * 0.5,
child: UserImagePicker(
imagePickFn: _pickedImage,
),
),
SizedBox(
height: 10.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.person,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Username',
username),
),
SizedBox(
height: 15.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.edit,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Description',
description),
),
SizedBox(
height: 15.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.call,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Contact No.',
contact),
),
SizedBox(
height: 15.0,
),
Form(
key: _formKey,
child: Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.cake,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Date of Birth',
password),
),
),
SizedBox(
height: 15.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.location_on,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Area',
area),
),
SizedBox(
height: 15.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.email,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Email',
email),
),
SizedBox(
height: 15.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.lock,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Password',
password),
),
SizedBox(
height: 15.0,
),
Padding(
padding: const EdgeInsets.only(left: 25.0, right: 25.0),
child: GlobalTextField(
Icon(
Icons.lock,
color: Color.fromRGBO(198, 57, 93, 1),
),
'Confirm Password',
password),
),
SizedBox(
height: 70.0,
),
GlobalButton('CONTINUE', () {
print('userName: ${username}');
}, width * 0.7),
SizedBox(
height: 50.0,
),
Text(
'By creating an account you agree to our',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
Text(
'Terms of Service and Privacy Policy',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
color: Color.fromRGBO(198, 57, 93, 1),
),
),
SizedBox(
height: 50.0,
),
],
),
),
),
),
);
}
}
請創建一個static
(Global) function 如下所示,然后在常規表單小部件中使用它。 您將擁有validator
function,通過它,它將起作用:
static Widget MyInputField(
{String initialValue = "",
Function(String) onSaved,
String hint,
bool hide = false,
Icon prefixIcon,
Widget suffixIcon,
bool enabled = true,
TextInputType textInputType = TextInputType.emailAddress,
Function(bool) onSuffixIconClick,
Function(String) validator}) {
return SizedBox(
child: TextFormField(
initialValue: initialValue,
obscureText: hide,
onSaved: onSaved,
enabled: enabled,
decoration: new InputDecoration(
prefixIcon: prefixIcon,
suffixIcon: suffixIcon,
fillColor: enabled ? MyColor.white : MyColor.disabledColor,
filled: true,
contentPadding:
EdgeInsets.symmetric(vertical: 10.0, horizontal: 10.0),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: MyColor.accentColor, width: 1.0),
),
errorBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.red, width: 1.0),
),
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: MyColor.primaryColor, width: 1.0),
),
disabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.green, width: 1.0),
),
hintText: hint,
),
validator: validator,
keyboardType: textInputType,
style:
MyStyle.titleStyle(enabled ? MyColor.primaryColor : Colors.white),
),
);
}
如果事情 go 好,請告訴我。 祝你有美好的一天。
如果您想從 TextField 返回數據,那么您可以嘗試下面的代碼,這將對您有所幫助。
GlobalButton('CONTINUE', () {
print("Username${username.text.toString()}");
print("Descriptiom${description.text.toString()}");
}, width * 0.7),
感謝所有的開發者。 這是因為我使用的是 const GlobalTextWidget 構造函數,我只是刪除了 const 關鍵字,它現在工作正常。
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