问题描述
我的代码结构
注册 -----personal_info.dart -----mobile_verfiction.dart 登录
我尝试在用户成功注册后从 register.dart 的子类 Personal_info.dart 导航到 login.dart，以便此人可以登录以使用该应用程序。但是我收到错误消息“多个小部件使用了相同的 GlobalKey”，并且当我尝试输入电子邮件/密码时登录屏幕变黑。
这里是代码 个人信息.dart
import 'package:shared_preferences/shared_preferences.dart';
import 'package:Flutter/material.dart';
import 'package:king_research/extras/constants.dart';
import 'package:king_research/extras/routes.dart';
import 'package:king_research/main_structure.dart';
import 'package:king_research/screens/login.dart';
import 'package:http/http.dart' as http;
class PersonalInfo extends StatefulWidget {
@override
_PersonalInfoState createState() => _PersonalInfoState();
}
String errorMessage = "";
String successMessage = "";
bool isRegistered = false;
class _PersonalInfoState extends State<PersonalInfo> {
String email="";
String password="";
String name="";
String mobile="";
@override
final _formKey=GlobalKey<FormState>();
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
child: SafeArea(
child: Padding(
padding: EdgeInsets.fromLTRB(20,100,20,20),child: Form(
key: _formKey,child: Material(
color: Colors.grey[900],child: Column(
children: [
TextFormField(
style: TextStyle(color: Colors.white),decoration: Inputdecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.grey,),focusedBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.grey
)
),hintText: "Enter user Name",labelText: "Full name",fillColor: Colors.white,labelStyle: TextStyle(color: Colors.grey),hintStyle: TextStyle(color:Colors.grey),floatingLabelBehavior: FloatingLabelBehavior.always,onChanged: (value){
name=value;
setState(() {});
},validator: (value){
if(value.isEmpty){
return 'User name should not be empty';
}
return null;
},SizedBox(
height: 20,TextFormField(
style: TextStyle(color: Colors.white),decoration: Inputdecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.grey,focusedBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.grey
)
),hintText: "userid@gmail.com",labelText: "Email Id",onChanged: (value){
email=value;
setState(() {});
},validator: (value){
if(value.isEmpty){
return 'Email id should not be empty';
}
return null;
},hintText: "+91-9876543210",labelText: "Mobile number",onChanged: (value){
mobile=value;
setState(() {});
},validator: (value){
if(value.isEmpty){
return 'Mobile number should not be empty';
}
return null;
},obscureText: true,hintText: "Enter password",labelText: "Password",onChanged: (value){
password=value;
setState(() {});
},validator: (value){
if(value.isEmpty){
return 'Country name should not be empty';
}
return null;
},SizedBox(height: 20,Container(
child: (errorMessage.isNotEmpty)
? Text('Error Msg : ${errorMessage}',style: TextStyle(
color: Colors.red,fontWeight: FontWeight.bold
),)
: Text('')
),Container(
child: (successMessage.isNotEmpty)
? Text('Success Msg : ${successMessage}',style: TextStyle(
color: Colors.green[700],)
: Text('')
),ElevatedButton(child: Text("CONTINUE"),onpressed: ()async{
register(name,email,mobile,password,context);
},style: ButtonStyle(
backgroundColor: MaterialStateProperty.all<Color>(Colors.blue),],);
}
}
Future<void> register (String name,String email,String mobile,String password,context) async{
print('#########################');
print(name);
print(email);
print(mobile);
print(password);
print('#########################');
Constant con = Constant();
var url = Uri.parse(con.baseURL+"/api/auth/register");
var response = await http.post(url,body : { 'email' : email,'password' : password,'name': name,'mobile': mobile });
var res = jsonDecode(response.body);
print(res);
if(res['status']){
isRegistered = true;
print("isRegistered Value : ${isRegistered}");
print(res);
// Navigator.of(context).push(MaterialPageRoute(builder: (BuildContext context) => Structure()));
Navigator.of(context).pushAndRemoveUntil(MaterialPageRoute(builder: (BuildContext context)=>LoginPage()),(Route<dynamic>route)=>false);
successMessage = res['message'];
print(successMessage);
}
else{
isRegistered = false;
print("isRegistered Value : ${isRegistered}");
errorMessage = res['message'];
print(errorMessage);
}
}
登录.dart
import 'dart:convert';
import 'package:king_research/spinner.dart';
import 'package:Flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:king_research/classesForApi/loading_screen.dart';
import 'package:king_research/extras/constants.dart';
import 'package:king_research/extras/routes.dart';
import 'package:king_research/main_structure.dart';
import 'package:shared_preferences/shared_preferences.dart';
final GlobalKey<NavigatorState> navigatorKey = new GlobalKey<NavigatorState>();
class LoginPage extends StatefulWidget {
@override
_LoginPageState createState() => _LoginPageState();
}
String errorMessage = "";
String successMessage = "";
bool isLoggedIn = false;
class _LoginPageState extends State<LoginPage> {
String email = "";
String password = "";
final _formKey = GlobalKey<FormState>();
bool spinnerLoading=false;
@override
void initState(){
checkAuth(context);
}
get generateRoute => null;
@override
Widget build(BuildContext context) {
return MaterialApp(
onGenerateRoute: generateRoute,navigatorKey: navigatorKey,home: Scaffold(
backgroundColor: Colors.grey[900],appBar: AppBar(
title: Text(
'Sign In',style: TextStyle(color: Colors.white,fontWeight: FontWeight.bold),backgroundColor: Colors.grey[900],body: SingleChildScrollView(
child: SafeArea(
child: Padding(
padding: EdgeInsets.fromLTRB(20,child: Form(
key: _formKey,decoration: Inputdecoration(
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.grey,focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.grey)),hintText: "Enter user email",labelText: "email id",hintStyle: TextStyle(color: Colors.grey),onChanged: (value) {
email = value;
setState(() {});
},validator: (value) {
if (value.isEmpty) {
return 'User email id should not be empty';
}
return null;
},labelText: "User password",onChanged: (value) {
password = value;
setState(() {});
},validator: (value) {
if (value.isEmpty) {
return 'User password should not be empty';
}
return null;
},Container(
color: Colors.redAccent,child: (errorMessage.isNotEmpty)
? Text(errorMessage)
: Text('')),ElevatedButton(
child: Text("SIGN IN"),onpressed: () {
login(email,context);
if (_formKey.currentState.validate()) {
setState(() {
spinnerLoading=true;
});
if (isLoggedIn == true) {
setState(() {
spinnerLoading=false;
});
Navigator.push(
context,MaterialPageRoute(
builder: (context) => Structure()),);
}
}
},style: ButtonStyle(
backgroundColor:
MaterialStateProperty.all<Color>(Colors.blue),Row(
mainAxisAlignment: MainAxisAlignment.end,children: [
Text(
'Forget Password?',fontSize: 12),SizedBox(
height: 10,Divider(
thickness: 1,height: 1,color: Colors.grey,InkWell(
onTap: () {
Navigator.pushNamed(context,MyRoutes.registerRoute);
},child: Text(
"Don't have an account? Sign Up",fontSize: 18),)
],);
}
}
Future<void> login(String email,context) async {
Constant con = Constant();
print('#########################');
print(email);
print(password);
// email = "charulmehta24@gmail.com";
print('#########################');
var postBody = jsonEncode({'email': email,'password': password});
var url = Uri.parse(con.baseURL + "/api/auth/login");
var response =
await http.post(url,body: {'email': email,'password': password});
print('#########################');
print(response.body);
var res = jsonDecode(response.body);
if (res['status']) {
isLoggedIn = true;
print("isLoggedIn Value : ${isLoggedIn}");
print(res);
Navigator.of(context).pushAndRemoveUntil(MaterialPageRoute(builder: (BuildContext context)=>Structure()),(Route<dynamic>route)=>false);
await adStringToSF(res['data']['accesstoken']);
var sharedPFData = await getStringValueSF();
print(sharedPFData);
} else {
isLoggedIn = false;
print("isLoggedIn Value : ${isLoggedIn}");
errorMessage = res['message'];
}
// print(response.body);
print('#########################');
}
// To Get Shared Preference Data
Future<String> getStringValueSF() async {
SharedPreferences prefs = await SharedPreferences.getInstance();
String stringValue = prefs.getString('authToken');
return stringValue;
}
// To Set Shared Perefrence Data
Future<void> adStringToSF(token) async {
SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.setString('authToken',token);
}
void checkAuth(context) async {
SharedPreferences prefs = await SharedPreferences.getInstance();
String authToken = prefs.getString('authToken');
if(authToken != null){
Navigator.of(context).pushAndRemoveUntil(MaterialPageRoute(builder: (BuildContext context)=>Structure()),(Route<dynamic>route)=>false);
}
}
注册.dart
import 'package:Flutter/material.dart';
import 'package:king_research/tab_screens/number_verification.dart';
import 'package:king_research/tab_screens/personal_info.dart';
class RegisterPage extends StatefulWidget {
@override
_RegisterPageState createState() => _RegisterPageState();
}
class _RegisterPageState extends State<RegisterPage> {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 2,child: Scaffold(
backgroundColor: Colors.grey[900],appBar: AppBar(
title: Text(
"Sign Up",style: TextStyle(
color: Colors.white,fontWeight: FontWeight.bold
),bottom: TabBar(
tabs: [
Text('Personal Info',style: TextStyle(
color: Colors.white,fontWeight: FontWeight.w600
),Text('Number varification',)
],body: TabBarView(
children: [
PersonalInfo(),NumberVarification()
],);
}
}
解决方法
您可以尝试为每个 From 定义不同的键：
static const yourKeyName = const ValueKey('yourKeyName')
或者您可以为每个不同的实例添加调试标签：
final GlobalKey<FormState> _formKey =
new GlobalKey<FormState>(debugLabel: '_loginFormKey');