【发布时间】：2021-06-07 21:35:57
【问题描述】：
我有一个创建 2FA totp 密钥的应用程序。当我在未填写表单时单击“添加”按钮时，它会显示一个警报对话框。如果我第二次单击它（仍然没有填写表单），则不会显示警报对话框。如何无限次显示警报对话框？我使用 BlocConsumer 来监听更改并在状态为 ManualInputError 时显示警报对话框，并使用 BlocBuilder 来显示实际的 TextButton。
代码：
import 'dart:io';
import 'package:duckie/blocs/manual_input/manual_input_bloc.dart';
import 'package:duckie/screens/widgets/alert_dialog.dart';
import 'package:duckie/screens/widgets/custom_text_field.dart';
import 'package:duckie/shared/text_styles.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
class ManualInputScreen extends StatefulWidget {
@override
_ManualInputScreenState createState() => _ManualInputScreenState();
}
class _ManualInputScreenState extends State<ManualInputScreen> {
String secretKey;
String issuer;
String accountName;
String numberOfDigits = '6';
String timeStep = '30';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
'manual-input',
style: TextStyles.appBarText,
).tr(),
centerTitle: true,
elevation: 0.0,
actions: [
BlocConsumer<ManualInputBloc, ManualInputState>(
listener: (context, state) {
if (state is ManualInputError) {
Platform.isAndroid
? CustomAlertDialog.showAndroidAlertDialog(
context,
state.alertDialogErrorTitle,
state.alertDialogErrorContent)
: CustomAlertDialog.showIosAlertDialog(
context,
state.alertDialogErrorTitle,
state.alertDialogErrorContent);
BlocProvider.of<ManualInputBloc>(context).close();
}
},
builder: (context, state) {
if (state is ManualInputInitial || state is ManualInputFinal) {
return TextButton(
onPressed: () {
BlocProvider.of<ManualInputBloc>(context).add(
GetFormTextEvent(secretKey, issuer, accountName,
numberOfDigits, timeStep));
},
child: Text('add').tr(),
);
}
return TextButton(
onPressed: () {},
child: Text('add').tr(),
);
},
)
],
),
body: Container(
padding: EdgeInsets.all(8.0),
child: ListView(
children: [
CustomTextField(
labelText: 'secret-key'.tr(),
onChanged: (value) {
setState(() {
secretKey = value;
});
},
),
SizedBox(
height: 8.0,
),
CustomTextField(
labelText: 'issuer'.tr(),
onChanged: (value) {
issuer = value;
},
),
SizedBox(
height: 8.0,
),
CustomTextField(
labelText: 'account-name'.tr(),
onChanged: (value) {
setState(() {
accountName = value;
});
},
),
SizedBox(
height: 8.0,
),
Platform.isAndroid
? ListBody(
children: [
Text('number-of-digits').tr(),
SizedBox(
height: 5.0,
),
DropdownButton(
value: numberOfDigits,
onChanged: (value) {
setState(() {
numberOfDigits = value;
});
},
items: [
DropdownMenuItem(
value: '6',
child: Text('6'),
),
DropdownMenuItem(
value: '8',
child: Text('8'),
),
],
)
],
)
: ListBody(
children: [
Text('number-of-digits').tr(),
SizedBox(
height: 5.0,
),
CupertinoSegmentedControl(
groupValue: numberOfDigits,
children: {
'6': Text('6'),
'8': Text('8'),
},
onValueChanged: (value) {
setState(() {
numberOfDigits = value;
});
},
),
],
),
SizedBox(
height: 8.0,
),
Platform.isAndroid
? ListBody(
children: [
Text('time-step').tr(),
SizedBox(
height: 5.0,
),
DropdownButton(
value: timeStep,
onChanged: (value) {
setState(() {
timeStep = value;
});
},
items: [
DropdownMenuItem(
value: '30',
child: Text('30'),
),
DropdownMenuItem(
value: '60',
child: Text('60'),
),
],
)
],
)
: ListBody(
children: [
Text('time-step').tr(),
SizedBox(
height: 5.0,
),
CupertinoSegmentedControl(
groupValue: timeStep,
children: {
'30': Text('30'),
'60': Text('60'),
},
onValueChanged: (value) {
setState(() {
timeStep = value;
});
},
),
],
),
],
),
),
);
}
}
【问题讨论】：
-
你能分享 BLoC 和州代码吗？