我是新手。我遇到问题,但不确定如何调试以解决问题。我尝试建立一个登录/注册页面。但是,当我尝试在文本字段中输入值时,出现软键时它将仅显示白屏。不知道为什么会这样。您能帮我指导如何解决此问题吗?预先谢谢你。
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main.dart
import 'package:flutter/material.dart';
import 'sign_in.dart';
import 'sign_up.dart';
import 'reset_password.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.red,
accentColor: Colors.redAccent,
),
home: DefaultTabController(
length: 3,
child: Scaffold(
appBar: AppBar(
bottom: TabBar(
tabs: [
Tab(
child: Text('Sign In'),
),
Tab(
child: Text('Sign Up'),
),
Tab(
child: Text('Reset Password'),
),
], indicatorColor: Colors.white,
),
),
body: TabBarView(
children: [
SignIn(),
SignUp(),
ResetPassword(),
],
),
),
),
);
}
}
sign_in.dart
import 'package:flutter/material.dart';
class SignIn extends StatefulWidget {
_SignInState createState() => _SignInState();
}
class _SignInState extends State<SignIn> {
Widget build(BuildContext context) {
return Scaffold(
body: Container(
padding: EdgeInsets.all(20.0),
child: Form(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'Email'),
),
SizedBox(height: 20.0),
TextFormField(
decoration: InputDecoration(labelText: 'Password'),
obscureText: true,
),
SizedBox(height: 20.0),
RaisedButton(
color: Colors.red,
child: Text('Sign In',
style: TextStyle(fontSize: 15.0, color: Colors.white)),
onPressed: validateAndSave,
),
],
)),
),
);
}
}
void validateAndSave() {}
答案 0 :(得分:0)
尝试此代码。 删除这种定义..
的方法 void main() => runApp(MaterialApp(
debugShowCheckedModeBanner: false,
home: MyApp(),
));
尝试这种方式,我现在测试可以正常工作。
class TestApp extends StatelessWidget{
@override
Widget build(BuildContext context) {
return MaterialApp(
home: TabViewDemo(),
);
}
}
然后..
void main() {
runApp(TestApp());
此代码。
class TabViewDemo extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<TabViewDemo> {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.red,
accentColor: Colors.redAccent,
),
home: DefaultTabController(
length: 3,
child: Scaffold(
appBar: AppBar(
bottom: TabBar(
tabs: [
Tab(
child: Text('Sign In'),
),
Tab(
child: Text('Sign Up'),
),
Tab(
child: Text('Reset Password'),
),
],
indicatorColor: Colors.white,
),
),
body: TabBarView(
children: [
SignIn(),
],
),
),
),
);
}
}
答案 1 :(得分:0)
如果你们遇到同样的问题,请尝试使用此solution。这个对我有用。谢谢。