这是我的文本字段代码
// lib/widget/textfield_widget.dart
import 'package:flutter/material.dart';
class TextFieldWiget extends StatelessWidget {
const TextFieldWiget({
super.key,
required this.maxLine,
required this.hintText,
required this.txtController,
});
final String hintText;
final int maxLine;
final TextEditingController txtController;
@override
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.symmetric(horizontal: 20),
decoration: BoxDecoration(
color: Colors.grey[50],
borderRadius: BorderRadius.circular(8),
),
child: TextField(
style: TextStyle(color: Colors.black),
controller: txtController,
decoration: InputDecoration(
enabledBorder: InputBorder.none,
focusedBorder: InputBorder.none,
hintText: hintText,
),
maxLines: maxLine,
),
);
}
}
这是我输入一些文本时的代码
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_zitacademy_todo_app_firebase/constants/app_style.dart';
import 'package:flutter_zitacademy_todo_app_firebase/provider/date_time_provider.dart';
import 'package:flutter_zitacademy_todo_app_firebase/provider/radio_provider.dart';
import 'package:gap/gap.dart';
import 'package:intl/intl.dart';
import '../widget/datetime_widget.dart';
import '../widget/radio_widget.dart';
import '../widget/textfield_widget.dart';
class AddNewTaskModel extends ConsumerWidget {
AddNewTaskModel({
super.key,
});
final titleController = TextEditingController();
final descriptionController = TextEditingController();
@override
Widget build(BuildContext context, WidgetRef ref) {
final dateProv = ref.watch(dateProvider);
return Container(
padding: const EdgeInsets.all(30),
height: MediaQuery.of(context).size.height * 0.70,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(16),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const SizedBox(
width: double.infinity,
child: Text(
"New Task Todo",
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 22,
fontWeight: FontWeight.bold,
color: Colors.black,
),
),
),
const Divider(
thickness: 1.5,
color: Colors.green,
),
const Gap(5),
const Text(
"Title Task",
style: AppStyle.headingOne,
),
const Gap(2),
TextFieldWiget(
maxLine: 1,
hintText: "Add New Task",
txtController: titleController,
),
const Gap(5),
const Text(
'Description',
style: AppStyle.headingOne,
),
const Gap(2),
TextFieldWiget(
maxLine: 5,
hintText: "Add Descrption",
txtController: descriptionController,
),
const Gap(5),
const Text(
'Category',
style: AppStyle.headingOne,
),
Row(
children: [
Expanded(
child: RadioWidget(
titleRadio: 'Work',
categColor: Colors.green,
valueInput: 1,
onChangedValue: () =>
ref.read(radioProvider.notifier).update((state) => 1),
),
),
Expanded(
child: RadioWidget(
titleRadio: 'Home',
categColor: Colors.red,
valueInput: 2,
onChangedValue: () =>
ref.read(radioProvider.notifier).update((state) => 2),
),
),
Expanded(
child: RadioWidget(
titleRadio: 'Play',
categColor: Colors.blue,
valueInput: 3,
onChangedValue: () =>
ref.read(radioProvider.notifier).update((state) => 3),
),
)
],
),
const Gap(5),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
DateTimeWidget(
titleText: 'Date & Time',
valueText: dateProv,
iconSection: CupertinoIcons.calendar,
onTap: () async {
final getValue = await showDatePicker(
context: context,
initialDate: DateTime.now(),
firstDate: DateTime(2020),
lastDate: DateTime(2050),
);
if (getValue != null) {
final format = DateFormat.yMd();
ref.read(dateProvider.notifier).update(
(state) => format.format(getValue),
);
print(format.format(getValue));
}
},
),
Gap(5),
DateTimeWidget(
titleText: 'Date & Time',
valueText: ref.watch(timeProvider),
iconSection: CupertinoIcons.clock,
onTap: () async {
final getTime = await showTimePicker(
context: context,
initialTime: TimeOfDay.now(),
);
if (getTime != null) {
ref.read(timeProvider.notifier).update(
(state) => getTime.format(context),
);
}
},
),
],
),
const Gap(3),
Flexible(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
child: ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.blue,
foregroundColor: Colors.white,
elevation: 0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
side: const BorderSide(
color: Colors.blue,
),
padding: const EdgeInsets.symmetric(
vertical: 10,
),
),
onPressed: () => Navigator.pop(context),
child: const Text('Cancel'),
),
),
const Gap(5),
Expanded(
child: ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.white,
foregroundColor: Colors.blue,
elevation: 0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
side: const BorderSide(
color: Colors.blue,
),
padding: const EdgeInsets.symmetric(
vertical: 10,
),
),
onPressed: () {
final getRadioValue = ref.read(radioProvider);
String category = '';
switch (getRadioValue) {
case 1:
category = 'Learning';
break;
case 2:
category = 'Working';
break;
case 3:
category = 'General';
break;
}
// ref.read(serviceProvider).addNewTask(
// TodoModel(
// titleTask: titleController.text,
// description: descriptionController.text,
// category: category,
// timeTask: ref.read(timeProvider),
// dateTask: ref.read(dateProvider),
// ),
// );
print(titleController.text+ 'title controller');
print(ref.read(dateProvider));
},
child: const Text('Save'),
),
),
],
),
)
],
),
);
}
}
为什么每次我在 TextField 中输入内容时，在 Flutter 中单击后退按钮或清除键盘后，它总是消失？ -Dart SDK版本：3.3.2 -颤振3.19.4 -Android SDK API 31 谁能帮我解决这个问题吗？我已阅读文档，但它是一样的
Riverpod 的创建者建议将
TextEditingControllerhttps://github.com/rrousselGit/riverpod/discussions/2680#discussioncomment-6300904
因此，您可以将
AddNewTaskModelStatefulWidgetConsumer@override
Widget build(BuildContext context){
return Consumer(
builder: (context, ref, child) {
final value = ref.watch(someOtherProvider);
// put your widgets here
return Text(value);
},
);
}