我有一个小的表格，我想在其中点击文本字段，然后会弹出一个对话框。当我运行我的应用程序并点击文本字段时，onTap函数内部的代码未得到执行。这是我的代码
import 'package:form_bloc/form_bloc.dart';
class IncomeFormBloc extends FormBloc<String, String> {
final expectedAmount = TextFieldBloc(
validators: [FieldBlocValidators.requiredTextFieldBloc],
);
final frequency = TextFieldBloc(
validators: [FieldBlocValidators.requiredTextFieldBloc],
);
final payoutDate = TextFieldBloc(
validators: [FieldBlocValidators.requiredTextFieldBloc],
);
final category = TextFieldBloc(
validators: [FieldBlocValidators.requiredTextFieldBloc],
);
final depositTo = TextFieldBloc(
validators: [FieldBlocValidators.requiredTextFieldBloc],
);
final description = TextFieldBloc(
validators: [FieldBlocValidators.requiredTextFieldBloc],
);
final booleanField = BooleanFieldBloc();
final selectField1 = SelectFieldBloc(
items: ['Option 1', 'Option 2', 'Option 3'],
);
final selectField2 = SelectFieldBloc(
items: ['Option 1', 'Option 2'],
);
final multiSelectField = MultiSelectFieldBloc<String>(
items: ['Option 1', 'Option 2', 'Option 3'],
);
@override
List<FieldBloc> get fieldBlocs => [
expectedAmount,
frequency,
payoutDate,
category,
depositTo,
description,
selectField1
];
@override
Stream<FormBlocState<String, String>> onSubmitting() async* {
// Awesome logic...
await Future<void>.delayed(Duration(seconds: 2));
yield state.toSuccess('Success');
// yield `state.toLoaded()` because
// you can't submit if the current state is `FormBlocSuccess`.
// In most cases you don't need to do this,
// because you only want to submit only once,
// but in this case you want the user to submit more than once.
// See: https://pub.dev/documentation/form_bloc/latest/form_bloc/FormBloc/onSubmitting.html
yield state.toLoaded();
}
}
import 'package:flutter/material.dart';
import 'package:finsec/widget/row_text_input.dart';
import 'package:finsec/widget/text_form_field.dart';
import 'package:finsec/widget/save_button.dart';
import 'package:finsec/utils/strings.dart';
import 'package:finsec/utils/dimens.dart';
import 'package:finsec/utils/colors.dart';
import 'package:finsec/widget/column_text_input.dart';
import 'package:finsec/data/blocs/transaction_bloc.dart';
import 'package:finsec/model/income/income.dart';
import 'package:finsec/model/income/income_dao.dart';
import 'package:finsec/data/db_provider.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:finsec/flutter_form_bloc.dart';
import 'package:finsec/data/blocs/income_form_bloc.dart';
import 'package:finsec/widget/widgets.dart';
import 'package:form_bloc/form_bloc.dart';
import 'package:rflutter_alert/rflutter_alert.dart';
class AddEditIncome extends StatefulWidget {
final String appBarTitle;
final Income income;
AddEditIncome({this.income, this.appBarTitle});
@override
State<StatefulWidget> createState() {
return _AddEditIncomeState();
}
}
class _AddEditIncomeState extends State<AddEditIncome> {
var _formKey = GlobalKey<FormState>();
var _currentItemSelected = '';
String appBarTitle;
Income income;
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
return BlocProvider<IncomeFormBloc>(
builder: (context) => IncomeFormBloc(),
child: Builder(
builder: (context) {
final formBloc = BlocProvider.of<IncomeFormBloc>(context);
return Scaffold(
appBar: AppBar(title: Text('Form Fields Example')),
body: FormBlocListener<IncomeFormBloc, String, String>(
onSubmitting: (context, state) => LoadingDialog.show(context),
onSuccess: (context, state) {
LoadingDialog.hide(context);
Notifications.showSnackBarWithSuccess(
context, state.successResponse);
},
onFailure: (context, state) {
LoadingDialog.hide(context);
Notifications.showSnackBarWithError(
context, state.failureResponse);
},
child: Column(
children: <Widget>[
TextFieldBlocBuilder(
textFieldBloc: formBloc.expectedAmount,
focusNode: AlwaysDisabledFocusNode(),
onTap: () {
print('SHOW DIALOG');
},
decoration: InputDecoration(
labelText: 'TextFieldBlocBuilder',
prefixIcon: Icon(Icons.sentiment_very_satisfied),
border: OutlineInputBorder(
borderSide: BorderSide(width:5.0),
borderRadius: BorderRadius.circular(5.0)
)
),
errorBuilder: (context, error) {
switch (error) {
case FieldBlocValidatorsErrors.requiredTextFieldBloc:
return 'You must write amazing text.';
break;
default:
return 'This text is nor valid.';
}
},
),
DropdownFieldBlocBuilder<String>(
selectFieldBloc: formBloc.selectField1,
decoration: InputDecoration(
labelText: 'DropdownFieldBlocBuilder',
prefixIcon: Icon(Icons.sentiment_very_dissatisfied),
),
itemBuilder: (context, value) => value,
padding: EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0), //size of textfield,
),
Padding(
padding: const EdgeInsets.all(8.0),
child: RaisedButton(
onPressed: formBloc.submit,
child: Center(child: Text('SUBMIT')),
),
),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 8.0),
child: RaisedButton(
onPressed: formBloc.clear,
child: Center(child: Text('CLEAR')),
),
),
],
),
),
);
},
),
);
}
_showDialog(BuildContext context) {
Scaffold.of(context)
.showSnackBar(SnackBar(content: Text('Submitting form')));
}
}
void _showDialog(context) {
// flutter defined function
showDialog(
context: context,
builder: (BuildContext context) {
// return alert dialog object
return AlertDialog(
title: new Text('I am Title'),
content: Container(
height: 150.0,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
new Row(
children: <Widget>[
new Icon(Icons.toys),
Padding(
padding: const EdgeInsets.only(left: 8.0),
child: new Text(' First Item'),
),
],
),
new SizedBox(
height: 20.0,
),
new Row(
children: <Widget>[
new Icon(Icons.toys),
Padding(
padding: const EdgeInsets.only(left: 8.0),
child: new Text(' Second Item'),
),
],
),
new SizedBox(
height: 20.0,
),
new Row(
children: <Widget>[
new Icon(Icons.toys),
Padding(
padding: const EdgeInsets.only(left: 8.0),
child: new Text('Third Item'),
),
],
),
],
),
),
);
},
);
}
class AlwaysDisabledFocusNode extends FocusNode {
@override
bool get hasFocus => false;
}
如果您注意到，我正在onTap函数中打印一条消息
child: Column(
children: <Widget>[
TextFieldBlocBuilder(
textFieldBloc: formBloc.expectedAmount,
focusNode: AlwaysDisabledFocusNode(),
onTap: () {
print('SHOW DIALOG');
},
我想做的是，当我点击文本字段时，不应显示软键盘，并且文本字段中不应显示任何光标，而应显示一个对话框，我可以在其中选择一个值并设置具有该值的文本字段。现在，我只是打印SHOW DIALOG消息，以查看onTap功能是否正常运行，但不能正常工作。如果我删除焦点代码focusNode: AlwaysDisabledFocusNode(),，那么当我点击文本字段时，光标将焦点对准文本字段和键盘，但是onTap代码不会执行。
有人可以对onTap为什么在我的代码中不起作用提出建议吗？
答案 0 :(得分：0)
那是一个错误，已在flutter_form_bloc: ^0.6.0中解决。