效果就是打不开键盘。我在其他地方对此问题做了一些挖掘，大多数问题是当小部件有状态时(但我的不是)。以下是 LoginWidget。我正在使用提供程序包，我怀疑它可能在幕后做一些事情。有人能发现我看不到的东西吗？ :
class LoginPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
String email, password;
final GlobalKey<FormState> formKey = GlobalKey<FormState>();
return ChangeNotifierProvider<LoginModel>(
builder: (context) => LoginModel(ViewState.Idle),
child: Consumer<LoginModel>(
builder: (context, model, child) => Scaffold(
appBar: AppBar(
title: Text("Sign in"),
),
body: Form(
key: formKey,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
TextFormField(
validator: (input) {
if (input.isEmpty) {
return "Email required";
}
},
onSaved: (input) => email = input,
decoration: InputDecoration(labelText: 'Email'),
),
TextFormField(
validator: (input) {
if (input.isEmpty) {
return "Password required";
}
},
onSaved: (input) => password = input,
decoration: InputDecoration(labelText: 'Password'),
obscureText: true,
),
model.state == ViewState.Loading
? CircularProgressIndicator()
: RaisedButton(
onPressed: () async {
if (formKey.currentState.validate()) {
formKey.currentState.save();
bool success =
await model.login(email, password);
if (success) {
// Navigator.pushNamed(context, '/');
Navigator.pushReplacement(
context,
MaterialPageRoute(
builder: (context) => HomePage()),
);
}
}
},
child: Text('Sign in'),
),
if (model.state == ViewState.Error)
Center(child: Text(model.apiErrorMessage))
],
)),
)));
}
}
最佳答案
解决方案是移动 final GlobalKey<FormState> formKey = GlobalKey<FormState>()走出 builder 并使其成为static .
关于Flutter - TextField 在焦点上重建小部件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56412548/