我在登录屏幕上看到可怕的黑色和黄色条纹，这会阻止用户在键盘弹出时登录。过去，我尝试过在登录屏幕上修复此错误，但没有运气。这是屏幕截图。
这是有问题的代码：
class LoginScreen extends StatelessWidget {
@override
Widget build(BuildContext context){
return new Scaffold(
body: Container (
decoration: BoxDecoration(
gradient: new LinearGradient(
colors: [Color.fromRGBO(1,89,99,1.0),Color.fromRGBO(1,1.0)],begin: Alignment.bottomLeft,end: Alignment.topRight
)
),child: new Column(
mainAxisAlignment: MainAxisAlignment.center,children:[
Container(
margin: EdgeInsets.all(20.0),child:Image.asset('lib/img/LBConnect2_white_small_trans.png'),),new LoginForm(),])
),);
}
登录表单类代码
class LoginForm extends StatefulWidget {
createState()
{
return new LoginFormState();
}
}
class LoginFormState extends State<LoginForm> with Validation
{
final formKey = GlobalKey<FormState>();
String emailaddress = '';
String passWord = '';
String token;
Widget build(context) {
return SingleChildScrollView (
child: Container(
margin: EdgeInsets.all(20.0),child: Form(
key: formKey,child: Column(
children: [
emailField(),passwordField(),Container(
margin: EdgeInsets.all(20.0),child:OutlineButton(
child: Text('LOGIN'),textColor: Colors.white,shape: new RoundedRectangleBorder(borderRadius: new BorderRadius.circular(30.0)),onpressed: (){
if(formKey.currentState.validate()){
formKey.currentState.save();
loginUser(emailaddress,passWord,token);
}
}
)
),Container(
margin: EdgeInsets.all(10.0),child: OutlineButton(
child: Text('Create account'),onpressed: () {
Navigator.of(context).push(new MaterialPageRoute(builder: (BuildContext context) =>
new ProfileStep1()));
},],)
)
）;
}
Widget emailField()
{
return TextFormField(
keyboardType: TextInputType.emailaddress,style: new TextStyle(color: Colors.white),decoration : InputDecoration(
labelText: 'Email Address',labelStyle: TextStyle(color: Colors.white,fontWeight: FontWeight.bold),validator: validateEmail,onSaved: (String value){
emailaddress = value;
},);
}
Widget passwordField()
{
return TextFormField(
style: new TextStyle(color: Colors.white),obscureText: true,decoration : InputDecoration(
labelText: 'Password',validator: validatePassword,onSaved: (String value){
passWord = value;
},);
}
Future<User> loginUser(String username,String password,String token ) async {
final FirebaseMessaging _fcm = FirebaseMessaging();
String token = await _fcm.getToken();
//print(token);
final response =
await http.post('api/Login',headers: {"Content-Type": "application/json",'accept': 'application/json',},body: json.encode({'email' : username,'password' : password,'token': token}));
if (response.statusCode == 200) {
// If the call to the server was successful,parse the JSON
User _user;
_user = User.fromJson(json.decode(response.body));
if(_user.userId.length > 1)
{
// Check user group and send them to proper home screen
if (_user.groupName == 'Member')
{
// Navigator.of(context).push(new MaterialPageRoute(builder: (BuildContext context) => new FirebaseTest()));
Navigator.of(context).push(new MaterialPageRoute(builder: (BuildContext context) => new FlutterReduxApp(user: _user)));
}
// Caregiver has logged in
else{
Navigator.of(context).push(new MaterialPageRoute(builder: (BuildContext context) => new LoginChoose(user: _user)));
}
}
return _user;
} else {
// If that call was not successful,throw an error.
throw Exception('Failed to load user');
}
}
}
仅在单击文本字段时显示键盘时才会发生。如您所见，登录按钮不可访问。