Flutter I/flatter(8686):引发了另一个异常:NoSuchMethodError:The method';保存';被调用为空
处理手势时引发以下NoSuchMethodError: 对null调用了方法“save”。 收件人:空 已尝试调用:save() 我正在创建一个页面来更新用户注册数据,当我单击“更新”时,会出现此错误,但什么也没有发生。我现在正在学习颤振,还有很多我不知道的,有人能帮我吗Flutter I/flatter(8686):引发了另一个异常:NoSuchMethodError:The method';保存';被调用为空,flutter,dart,Flutter,Dart,处理手势时引发以下NoSuchMethodError: 对null调用了方法“save”。 收件人:空 已尝试调用:save() 我正在创建一个页面来更新用户注册数据,当我单击“更新”时,会出现此错误,但什么也没有发生。我现在正在学习颤振,还有很多我不知道的,有人能帮我吗 import 'package:flutter/material.dart'; import '../../generated/l10n.dart'; import '../models/user.dart'; import
import 'package:flutter/material.dart';
import '../../generated/l10n.dart';
import '../models/user.dart';
import '../helpers/helper.dart';
import '../elements/BlockButtonWidget.dart';
import '../helpers/app_config.dart' as config;
import 'package:mvc_pattern/mvc_pattern.dart';
import '../repository/user_repository.dart' as repository;
import '../repository/user_repository.dart';
class SettingsController extends ControllerMVC {
GlobalKey<FormState> loginFormKey;
GlobalKey<ScaffoldState> scaffoldKey;
SettingsController() {
loginFormKey = new GlobalKey<FormState>();
this.scaffoldKey = new GlobalKey<ScaffoldState>();
}
void update(User user) async {
user.deviceToken = null;
repository.update(user).then((value) {
scaffoldKey?.currentState?.showSnackBar(SnackBar(
content: Text("Atualizado com Sucesso"),
));
});
}
}
class ProfileSettingsDialog extends StatefulWidget {
final User user;
final VoidCallback onChanged;
ProfileSettingsDialog({Key key, this.user, this.onChanged}) : super(key: key);
@override
_ProfileSettingsDialogState createState() => _ProfileSettingsDialogState();
}
class _ProfileSettingsDialogState extends State<ProfileSettingsDialog> {
GlobalKey<FormState> _profileSettingsFormKey = new GlobalKey<FormState>();
@override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: Helper.of(context).onWillPop,
child: Scaffold(
resizeToAvoidBottomPadding: false,
body: Stack(
alignment: AlignmentDirectional.topCenter,
children: <Widget>[
Positioned(
top: 0,
child: Container(
width: config.App(context).appWidth(100),
height: config.App(context).appHeight(29.5),
decoration: BoxDecoration(color: Theme.of(context).accentColor),
),
),
Positioned(
top: config.App(context).appHeight(29.5) - 120,
child: Container(
width: config.App(context).appWidth(84),
height: config.App(context).appHeight(29.5),
child: Text(
S.of(context).lets_start_with_register,
style: Theme.of(context).textTheme.headline2.merge(TextStyle(color: Theme.of(context).primaryColor)),
),
),
),
Positioned(
top: config.App(context).appHeight(29.5) - 50,
child: Container(
decoration: BoxDecoration(color: Theme.of(context).primaryColor, borderRadius: BorderRadius.all(Radius.circular(10)), boxShadow: [
BoxShadow(
blurRadius: 50,
color: Theme.of(context).hintColor.withOpacity(0.2),
)
]),
margin: EdgeInsets.symmetric(
horizontal: 20,
),
padding: EdgeInsets.symmetric(vertical: 50, horizontal: 27),
width: config.App(context).appWidth(88),
// height: config.App(context).appHeight(55),
child: Form(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextFormField(
keyboardType: TextInputType.text,
onSaved: (input) => widget.user.phone = input,
validator: (input) => input.trim().length < 3 ? S.of(context).not_a_valid_phone : null,
decoration: InputDecoration(
labelText: "Celular",
labelStyle: TextStyle(color: Theme.of(context).accentColor),
contentPadding: EdgeInsets.all(12),
hintText: S.of(context).john_doe,
hintStyle: TextStyle(color: Theme.of(context).focusColor.withOpacity(0.7)),
prefixIcon: Icon(Icons.person_outline, color: Theme.of(context).accentColor),
border: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.2))),
focusedBorder: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.5))),
enabledBorder: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.2))),
),
),
SizedBox(height: 30),
TextFormField(
keyboardType: TextInputType.text,
onSaved: (input) => widget.user.address = input,
validator: (input) => input.trim().length < 3 ? S.of(context).not_a_valid_address : null,
decoration: InputDecoration(
labelText: "Endereço",
labelStyle: TextStyle(color: Theme.of(context).accentColor),
contentPadding: EdgeInsets.all(12),
hintText: 'johndoe@gmail.com',
hintStyle: TextStyle(color: Theme.of(context).focusColor.withOpacity(0.7)),
prefixIcon: Icon(Icons.alternate_email, color: Theme.of(context).accentColor),
border: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.2))),
focusedBorder: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.5))),
enabledBorder: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.2))),
),
),
SizedBox(height: 30),
TextFormField(
keyboardType: TextInputType.text,
onSaved: (input) => widget.user.bio = input,
validator: (input) => input.trim().length < 3 ? S.of(context).not_a_valid_biography : null,
decoration: InputDecoration(
labelText: "Biografia",
labelStyle: TextStyle(color: Theme.of(context).accentColor),
contentPadding: EdgeInsets.all(12),
hintText: 'johndoe@gmail.com',
hintStyle: TextStyle(color: Theme.of(context).focusColor.withOpacity(0.7)),
prefixIcon: Icon(Icons.alternate_email, color: Theme.of(context).accentColor),
border: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.2))),
focusedBorder: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.5))),
enabledBorder: OutlineInputBorder(borderSide: BorderSide(color: Theme.of(context).focusColor.withOpacity(0.2))),
),
),
SizedBox(height: 30),
BlockButtonWidget(
text: Text(
S.of(context).register,
style: TextStyle(color: Theme.of(context).primaryColor),
),
color: Theme.of(context).accentColor,
onPressed: () {
_profileSettingsFormKey.currentState.save();
widget.onChanged();
Navigator.pop(context);
update(currentUser.value);
//setState(() {});
},
// widget.update(currentUser.value);
),
SizedBox(height: 25),
// FlatButton(
// onPressed: () {
// Navigator.of(context).pushNamed('/MobileVerification');
// },
// padding: EdgeInsets.symmetric(vertical: 14),
// color: Theme.of(context).accentColor.withOpacity(0.1),
// shape: StadiumBorder(),
// child: Text(
// 'Register with Google',
// textAlign: TextAlign.start,
// style: TextStyle(
// color: Theme.of(context).accentColor,
// ),
// ),
// ),
],
),
),
),
),
],
),
),
);
}
InputDecoration getInputDecoration({String hintText, String labelText}) {
return new InputDecoration(
hintText: hintText,
labelText: labelText,
hintStyle: Theme.of(context).textTheme.bodyText2.merge(
TextStyle(color: Theme.of(context).focusColor),
),
enabledBorder: UnderlineInputBorder(borderSide: BorderSide(color: Theme.of(context).hintColor.withOpacity(0.2))),
focusedBorder: UnderlineInputBorder(borderSide: BorderSide(color: Theme.of(context).hintColor)),
floatingLabelBehavior: FloatingLabelBehavior.auto,
labelStyle: Theme.of(context).textTheme.bodyText2.merge(
TextStyle(color: Theme.of(context).hintColor),
),
);
}
}
导入“包装:颤振/材料.省道”;
导入“../generated/l10n.dart”;
导入“../models/user.dart”;
导入“../helpers/helper.dart”;
导入“../elements/BlockButtonWidget.dart”;
将“../helpers/app_config.dart”作为配置导入;
导入“package:mvc_pattern/mvc_pattern.dart”;
导入“../repository/user_repository.dart”作为存储库;
导入“../repository/user_repository.dart”;
类设置Controller扩展了ControllerMVC{
GlobalKey-loginFormKey;
GlobalKey脚手架;
设置控制器(){
loginFormKey=newglobalkey();
this.scaffoldKey=new GlobalKey();
}
无效更新(用户)异步{
user.deviceToken=null;
repository.update(用户)。然后((值){
脚手架钥匙?.currentState?.showSnackBar(SnackBar(
内容:文本(“Atualizado com SUCCESSO”),
));
});
}
}
类配置文件设置Dialog扩展StatefulWidget{
最终用户;
更改后的最终作废;
ProfileSettingsDialog({Key-Key,this.user,this.onChanged}):super(Key:Key);
@凌驾
_ProfileSettingsDialogState createState()=>\u ProfileSettingsDialogState();
}
类_profilesetingsdialogstate扩展状态{
GlobalKey _profilesetingsformkey=newglobalkey();
@凌驾
小部件构建(构建上下文){
返回式示波器(
onWillPop:Helper.of(context).onWillPop,
孩子:脚手架(
resizeToAvoidBottomPadding:false,
主体:堆栈(
对齐:对齐方向.topCenter,
儿童:[
定位(
排名:0,
子:容器(
宽度:config.App(context).appWidth(100),
高度:config.App(context).appHeight(29.5),
装饰:盒子装饰(颜色:主题.of(上下文).accentColor),
),
),
定位(
顶部:config.App(context).appHeight(29.5)-120,
子:容器(
宽度:config.App(context).appWidth(84),
高度:config.App(context).appHeight(29.5),
子:文本(
让我们从注册开始,
样式:Theme.of(context).textTheme.headline2.merge(TextStyle(颜色:Theme.of(context.primaryColor)),
),
),
),
定位(
顶部:config.App(context).appHeight(29.5)-50,
子:容器(
装饰:框装饰(颜色:主题。背景)。原色,边框半径:边框半径。全部(半径。圆形(10)),框阴影:[
箱形阴影(
半径:50,
颜色:Theme.of(context).hintColor.withOpacity(0.2),
)
]),
边距:边缘组。对称(
横向:20,
),
填充:边缘组。对称(垂直:50,水平:27),
宽度:config.App(context).appWidth(88),
//高度:config.App(上下文).appHeight(55),
孩子:表格(
子:列(
crossAxisAlignment:crossAxisAlignment.stretch,
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
TextFormField(
键盘类型:TextInputType.text,
onSaved:(输入)=>widget.user.phone=输入,
验证器:(输入)=>input.trim()。长度<3?S.of(上下文)。无效\u电话:null,
装饰:输入装饰(
标签文字:“Celular”,
labelStyle:TextStyle(颜色:Theme.of(context).accentColor),
contentPadding:EdgeInsets.all(12),
hintText:S.of(上下文).john_doe,
hintStyle:TextStyle(颜色:Theme.of(context).focusColor.withOpacity(0.7)),
前缀:图标(Icons.person\u轮廓,颜色:Theme.of(context.accentColor),
border:OutlineInputBorder(borderSide:borderSide(颜色:Theme.of(context.focusColor.withOpacity(0.2)),
FocusedOrder:OutlineInputBorder(borderSide:borderSide(颜色:Theme.of(context.focusColor.withOpacity(0.5)),
enabledBorder:OutlineInputBorder(borderSide:borderSide(颜色:Theme.of(context.focusColor.withOpacity(0.2)),
),
),
尺寸箱(高度:30),
TextFormField(
键盘类型:TextInputType.text,
onSaved:(输入)=>widget.user.address=输入,
验证器:(输入)=>input.trim()。长度<3?S.of(上下文)。无效地址:null,
装饰:输入装饰(
labelText:“Endereço”,
labelStyle:TextStyle(颜色:Theme.of(context).accentColor),
contentPadding:EdgeInsets.all(12),
hintText:'johndoe@gmail.com',
hintStyle:TextStyle(颜色:Theme.of(context).focusColor.withOpacity(0.7)),
前缀:图标(Icons.alternate_电子邮件,颜色:Theme.of(context.accentColor),
border:OutlineInputBorder(borderSide:borderSide(颜色:Theme.of(context.focusColor.withOpacity(0.2)),
F
return Form(
key: _profileSettingsFormKey,
Form(
key: _profileSettingsFormKey,
// ...
)