Flutter Initstate方法不初始化控制器
我在用开始文本设置控制器时遇到问题。我的意思是,我将参数内的值传递到下一个屏幕,我希望在Flutter Initstate方法不初始化控制器,flutter,dart,Flutter,Dart,我在用开始文本设置控制器时遇到问题。我的意思是,我将参数内的值传递到下一个屏幕,我希望在TextFormField中设置该值。我试图在initState中用stat值初始化控制器,但看起来程序根本不使用这个方法。没有打印任何内容。 所以我看到了两个问题,第一个是没有进入initState方法,这导致我在下一个屏幕开始时没有任何文本 代码: import'包:email_validator/email_validator.dart'; 进口“包装:颤振/cupertino.dart”; 进口“包装
TextFormField
中设置该值。我试图在initState
中用stat值初始化控制器,但看起来程序根本不使用这个方法。没有打印任何内容。
所以我看到了两个问题,第一个是没有进入initState
方法,这导致我在下一个屏幕开始时没有任何文本
代码:
import'包:email_validator/email_validator.dart';
进口“包装:颤振/cupertino.dart”;
进口“包装:颤振/材料.省道”;
类注册页扩展StatefulWidget{
最终字符串电子邮件;
const RegistrationPage({Key?Key,必选this.email}):super(Key:Key);
@凌驾
_RegistrationPage createState()=>\u RegistrationPage();
}
类注册页扩展状态{
最终的GlobalKey _formKey=GlobalKey();
最终emailController=TextEditingController();
最终密码控制器=TextEditingController();
final repeatedPasswordController=TextEditingController();
final phoneNumberController=文本编辑控制器();
最终用户名控制器=TextEditingController();
var_passwordVisible=false;
var_repeatedPasswordVisible=false;
@凌驾
小部件构建(构建上下文){
@凌驾
无效处置(){
emailController.dispose();
passwordController.dispose();
repeatedPasswordController.dispose();
phoneNumberController.dispose();
usernameController.dispose();
super.dispose();
}
@凌驾
void initState(){
super.initState();
打印(“凹凸”);
emailController.text=widget.email;
}
返回脚手架(
appBar:appBar(
标题:文本(“Zarejestruj się”),
标题:对,
标高:6.0,
形状:连续矩形边框(
borderRadius:仅限常量borderRadius(
左上:半径。圆形(90.0),
),
),
),
正文:SingleChildScrollView(
子:容器(
填充:所有边缘设置(20.0),
宽度:MediaQuery.of(context).size.width,
高度:MediaQuery.of(context).size.height,
子:列(
crossAxisAlignment:crossAxisAlignment.center,
儿童:[
标志(尺寸:80),
大小盒子(
身高:28.0,
),
正文(
“Witamy na pokładzie!”,
样式:TextStyle(
尺寸:20,
颜色:颜色(0xff000000),
),
textAlign:textAlign.center,
),
大小盒子(
身高:8.0,
),
正文(
“Utwórz nowe konto”,
样式:TextStyle(
尺寸:17,
颜色:颜色(0xff000000),
),
textAlign:textAlign.center,
),
大小盒子(
身高:26.0,
),
形式(
键:_formKey,
子:列(
儿童:[
TextFormField(
控制器:emailController,
装饰:输入装饰(
边框:OutlineInputBorder(),
hintText:“地址电子邮件”,
填充颜色:颜色(0xffffffff),
是的,
前缀:图标(Icons.mail),
),
验证器:(值){
返回validateEmail(值);
},
),
大小盒子(
身高:10.0,
),
TextFormField(
控制器:电话号码控制器,
键盘类型:TextInputType.phone,
装饰:输入装饰(
边框:OutlineInputBorder(),
hintText:“电话号码”,
填充颜色:颜色(0xffffffff),
是的,
前缀:图标(Icons.phone),
),
验证器:(值){
返回validateMobile(值);
},
),
大小盒子(
身高:10.0,
),
TextFormField(
控制器:usernameController,
装饰:输入装饰(
边框:OutlineInputBorder(),
hintText:“Nazwa użytkownika”,
填充颜色:颜色(0xffffffff),
是的,
前缀:图标(图标.帐户\圆圈),
),
验证器:(值){
返回validateUsername(值);
},
),
大小盒子(
身高:10.0,
),
TextFormField(
控制器:密码控制器,
蒙蔽文字:!\u密码可见,
装饰:输入装饰(
errorMaxLines:2,
边框:OutlineInputBorder(),
hintText:“Hasło”,
填充颜色:颜色(0xffffffff),
是的,
前缀:图标(图标.密码),
后缀:图标按钮(
图标:图标(
_密码可见
?图标。可见性
:Icons.visibility\u o
import 'package:email_validator/email_validator.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class RegistrationPage extends StatefulWidget {
final String email;
const RegistrationPage({Key? key, required this.email}) : super(key: key);
@override
_RegistrationPage createState() => _RegistrationPage();
}
class _RegistrationPage extends State<RegistrationPage> {
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
final emailController = TextEditingController();
final passwordController = TextEditingController();
final repeatedPasswordController = TextEditingController();
final phoneNumberController = TextEditingController();
final usernameController = TextEditingController();
var _passwordVisible = false;
var _repeatedPasswordVisible = false;
@override
Widget build(BuildContext context) {
@override
void dispose() {
emailController.dispose();
passwordController.dispose();
repeatedPasswordController.dispose();
phoneNumberController.dispose();
usernameController.dispose();
super.dispose();
}
@override
void initState() {
super.initState();
print('bump');
emailController.text = widget.email;
}
return Scaffold(
appBar: AppBar(
title: Text("Zarejestruj się"),
centerTitle: true,
elevation: 6.0,
shape: ContinuousRectangleBorder(
borderRadius: const BorderRadius.only(
topLeft: Radius.circular(90.0),
),
),
),
body: SingleChildScrollView(
child: Container(
padding: EdgeInsets.all(20.0),
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
FlutterLogo(size: 80),
SizedBox(
height: 28.0,
),
Text(
'Witamy na pokładzie!',
style: TextStyle(
fontSize: 20,
color: Color(0xff000000),
),
textAlign: TextAlign.center,
),
SizedBox(
height: 8.0,
),
Text(
'Utwórz nowe konto',
style: TextStyle(
fontSize: 17,
color: Color(0xff000000),
),
textAlign: TextAlign.center,
),
SizedBox(
height: 26.0,
),
Form(
key: _formKey,
child: Column(
children: <Widget>[
TextFormField(
controller: emailController,
decoration: InputDecoration(
border: OutlineInputBorder(),
hintText: 'Adres e-mail',
fillColor: Color(0xffffffff),
filled: true,
prefixIcon: Icon(Icons.mail),
),
validator: (value) {
return validateEmail(value);
},
),
SizedBox(
height: 10.0,
),
TextFormField(
controller: phoneNumberController,
keyboardType: TextInputType.phone,
decoration: InputDecoration(
border: OutlineInputBorder(),
hintText: 'Numer telefonu',
fillColor: Color(0xffffffff),
filled: true,
prefixIcon: Icon(Icons.phone),
),
validator: (value) {
return validateMobile(value);
},
),
SizedBox(
height: 10.0,
),
TextFormField(
controller: usernameController,
decoration: InputDecoration(
border: OutlineInputBorder(),
hintText: 'Nazwa użytkownika',
fillColor: Color(0xffffffff),
filled: true,
prefixIcon: Icon(Icons.account_circle),
),
validator: (value) {
return validateUsername(value);
},
),
SizedBox(
height: 10.0,
),
TextFormField(
controller: passwordController,
obscureText: !_passwordVisible,
decoration: InputDecoration(
errorMaxLines: 2,
border: OutlineInputBorder(),
hintText: 'Hasło',
fillColor: Color(0xffffffff),
filled: true,
prefixIcon: Icon(Icons.password),
suffixIcon: IconButton(
icon: Icon(
_passwordVisible
? Icons.visibility
: Icons.visibility_off,
color: Theme.of(context).primaryColorDark,
),
onPressed: () {
setState(() {
_passwordVisible = !_passwordVisible;
});
},
),
),
validator: (value) {
return validatePassword(value);
},
),
SizedBox(
height: 10.0,
),
TextFormField(
controller: repeatedPasswordController,
obscureText: !_repeatedPasswordVisible,
decoration: InputDecoration(
border: OutlineInputBorder(),
hintText: 'Powtórz hasło',
fillColor: Color(0xffffffff),
filled: true,
prefixIcon: Icon(Icons.password),
suffixIcon: IconButton(
icon: Icon(
_repeatedPasswordVisible
? Icons.visibility
: Icons.visibility_off,
color: Theme.of(context).primaryColorDark,
),
onPressed: () {
setState(() {
_repeatedPasswordVisible =
!_repeatedPasswordVisible;
});
},
),
),
validator: (value) {
return validateRepeatedPassword();
},
),
SizedBox(
height: 15.0,
),
ConstrainedBox(
constraints:
BoxConstraints.tightFor(width: 240, height: 60),
child: ElevatedButton(
onPressed: () {
if (_formKey.currentState!.validate()) {
print('gut');
}
},
child: Text('Zarejestruj',
style: TextStyle(
fontSize: 30,
color: Color(0xffffffff),
),
textAlign: TextAlign.center),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all<Color>(
Color(0xFF2F45C6),
),
shape:
MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(25.0),
),
),
),
),
),
],
),
)
],
),
),
),
backgroundColor: const Color(0xFEF9F9FC),
);
}
validators....
}