Flutter设置管理插件clean_settings_nnbd的使用
Flutter设置管理插件clean_settings_nnbd的使用
clean_settings_nnbd
clean_settings_nnbd 是一个用于管理应用设置的Flutter插件。它支持null安全，并且是clean_settings包的一个分支。如果您有任何与null安全无关的建议或问题，请将其提交到原始仓库。
完整示例Demo
以下是一个完整的示例，展示了如何在Flutter应用中使用clean_settings_nnbd插件来管理各种设置项。
import 'package:clean_settings_nnbd/clean_settings_nnbd.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// 这个小部件是您的应用的根。
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Home(),
);
}
}
class Home extends StatefulWidget {
[@override](/user/override)
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
int counter = 0;
String theme = 'System Default';
bool smartReply = false;
String? autoReplyMessage;
int daysOfMailToSync = 5;
int chosenReplyOptionIndex = 1;
DateTime dateOfBirth = DateTime.now();
DateTime scheduledEmailDateTime = DateTime.now();
TimeOfDay dailyEmailAt = TimeOfDay(hour: 9, minute: 0);
bool disableDemoItems = false;
bool smartCompose = true;
[@override](/user/override)
Widget build(BuildContext context) {
String dateOfBirthSlug =
"${dateOfBirth.year.toString()}-${dateOfBirth.month.toString().padLeft(2, '0')}-${dateOfBirth.day.toString().padLeft(2, '0')}";
String scheduledEmailSlug =
"${scheduledEmailDateTime.year.toString()}-${scheduledEmailDateTime.month.toString().padLeft(2, '0')}-${scheduledEmailDateTime.day.toString().padLeft(2, '0')} ${scheduledEmailDateTime.hour.toString().padLeft(2, '0')}:${scheduledEmailDateTime.minute.toString().padLeft(2, '0')}";
var replyOptions = ['Reply', 'Reply All', 'Last Chosen', 'None'];
return Scaffold(
appBar: AppBar(
title: Text(
'App Settings',
style: TextStyle(
fontSize: 16.0,
fontWeight: FontWeight.w300,
color: Colors.black87),
),
centerTitle: true,
backgroundColor: Colors.white,
elevation: 0,
),
body: Container(
child: SettingContainer(
sections: [
SettingSection(
title: 'Demo Options',
items: [
SettingCheckboxItem(
title: 'Disable all items',
description: '禁用所有演示选项',
priority: ItemPriority.high,
value: disableDemoItems,
onChanged: (v) => setState(() => disableDemoItems = v != null ? v : false),
),
],
),
SettingSection(
title: 'Appearance',
items: [
SettingItem(
title: '简单计数器',
displayValue: counter.toString(),
onTap: () => setState(() => counter++),
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingItem(
title: '启动独角兽创业',
displayValue: '筹集数十亿美元',
onTap: () => setState(() => counter++),
priority: ItemPriority.disabled,
),
SettingRadioItem<String>(
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
title: '主题',
displayValue: '$theme 主题',
selectedValue: theme,
items: [
SettingRadioValue('Light', 'Light'),
SettingRadioValue('Dark', 'Dark'),
SettingRadioValue('System Default', 'System Default'),
],
onChanged: (v) => setState(() => theme = v),
),
],
),
SettingSection(
title: '互动',
items: [
SettingConfirmItem(
title: '删除账户',
displayValue: '永久删除您的账户',
alertTitle: '删除您的账户',
alertMessage: '您确定吗？',
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.high,
onConfirm: () => ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text('确认！'),
duration: Duration(seconds: 3))),
onCancel: () => ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text('取消！'),
duration: Duration(seconds: 3))),
),
SettingRadioItem<String>(
title: '主题',
displayValue: '$theme 主题',
selectedValue: theme,
items: [
SettingRadioValue('Light', 'Light'),
SettingRadioValue('Dark', 'Dark'),
SettingRadioValue('System Default', 'System Default'),
],
onChanged: (v) => setState(() => theme = v),
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
],
),
SettingSection(
title: '收件箱',
items: [
SettingCheckboxItem(
title: '智能回复',
value: smartReply,
onChanged: (v) =>
setState(() => smartReply = v != null ? v : false),
description: '在可用时显示建议的回复',
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingSwitchItem(
title: '智能撰写',
value: smartCompose,
onChanged: (v) => setState(() => smartCompose = v),
description: '显示预测性写作建议',
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingTextItem(
title: '自动回复消息',
displayValue: autoReplyMessage,
initialValue: autoReplyMessage,
hintText: '系统发送时',
onChanged: (v) => setState(() => autoReplyMessage = v),
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingWheelPickerItem(
title: '要同步的邮件天数',
displayValue: daysOfMailToSync.toString(),
initialValueIndex: daysOfMailToSync,
items: List.generate(10, (index) => index.toString()),
onChanged: (v) => setState(() => daysOfMailToSync = v),
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingWheelPickerItem(
title: '默认回复操作',
displayValue: replyOptions[chosenReplyOptionIndex],
initialValueIndex: chosenReplyOptionIndex,
items: replyOptions,
onChanged: (v) => setState(() => chosenReplyOptionIndex = v),
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingDateTimeItem<DateTime>(
title: '下次预定电子邮件时间',
displayValue: scheduledEmailSlug,
onChanged: (v) => setState(() => scheduledEmailDateTime = v),
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingDateTimeItem<DateTime>(
title: '出生日期',
displayValue: dateOfBirthSlug,
onChanged: (v) => setState(() => dateOfBirth = v),
timePicker: false,
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
SettingDateTimeItem<TimeOfDay>(
title: '每日唤醒邮件',
displayValue: dailyEmailAt.format(context),
onChanged: (v) => setState(() => dailyEmailAt = v),
datePicker: false,
priority: disableDemoItems
? ItemPriority.disabled
: ItemPriority.normal,
),
],
),
],
),
),
);
}
}
更多关于Flutter设置管理插件clean_settings_nnbd的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter设置管理插件clean_settings_nnbd的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然，以下是如何在Flutter项目中使用clean_settings_nnbd插件来管理设置的示例代码。clean_settings_nnbd是一个用于Flutter的设置管理插件，支持非空安全（Null Safety）。
1. 添加依赖
首先，在pubspec.yaml文件中添加clean_settings_nnbd的依赖：
dependencies:
flutter:
sdk: flutter
clean_settings_nnbd: ^最新版本号
请确保将^最新版本号替换为实际的最新版本号。
2. 导入包
在你的Dart文件中导入clean_settings_nnbd包：
import 'package:clean_settings_nnbd/clean_settings_nnbd.dart';
3. 配置Settings
定义一个设置模型类，继承自SettingsModel：
import 'package:clean_settings_nnbd/clean_settings_nnbd.dart';
class MySettings extends SettingsModel {
final String someSetting = 'default_value';
final bool anotherSetting = false;
MySettings() : super();
@override
Map<String, dynamic> toMap() {
return {
'someSetting': someSetting,
'anotherSetting': anotherSetting,
};
}
@override
void fromMap(Map<String, dynamic> map) {
someSetting = map['someSetting'] as String ?? 'default_value';
anotherSetting = map['anotherSetting'] as bool ?? false;
}
}
4. 初始化Settings
在你的应用初始化代码中，创建并初始化MySettings实例：
import 'package:flutter/material.dart';
import 'package:clean_settings_nnbd/clean_settings_nnbd.dart';
import 'path/to/your_settings_model.dart'; // 替换为实际的路径
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final MySettings settings = MySettings();
// 从本地存储加载设置
settings.load().then((_) {
// 可以在这里处理加载后的逻辑
});
// 监听设置变化
settings.addListener(() {
// 每次设置变化时执行的逻辑
});
return MaterialApp(
home: SettingsPage(settings: settings),
);
}
}
5. 使用Settings
在你的UI组件中使用设置：
import 'package:flutter/material.dart';
import 'path/to/your_settings_model.dart'; // 替换为实际的路径
class SettingsPage extends StatefulWidget {
final MySettings settings;
SettingsPage({required this.settings});
@override
_SettingsPageState createState() => _SettingsPageState();
}
class _SettingsPageState extends State<SettingsPage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Settings'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
Text('Some Setting: ${widget.settings.someSetting}'),
Switch(
value: widget.settings.anotherSetting,
onChanged: (value) {
setState(() {
widget.settings.anotherSetting = value;
widget.settings.save();
});
},
),
],
),
),
);
}
}
6. 完整示例
将上述代码片段组合成一个完整的示例：
// pubspec.yaml
dependencies:
flutter:
sdk: flutter
clean_settings_nnbd: ^最新版本号
// main.dart
import 'package:flutter/material.dart';
import 'package:clean_settings_nnbd/clean_settings_nnbd.dart';
class MySettings extends SettingsModel {
final String someSetting = 'default_value';
final bool anotherSetting = false;
MySettings() : super();
@override
Map<String, dynamic> toMap() {
return {
'someSetting': someSetting,
'anotherSetting': anotherSetting,
};
}
@override
void fromMap(Map<String, dynamic> map) {
someSetting = map['someSetting'] as String ?? 'default_value';
anotherSetting = map['anotherSetting'] as bool ?? false;
}
}
void main() {
final MySettings settings = MySettings();
settings.load().then((_) {
// 处理加载后的逻辑
});
settings.addListener(() {
// 处理设置变化的逻辑
});
runApp(MyApp(settings: settings));
}
class MyApp extends StatelessWidget {
final MySettings settings;
MyApp({required this.settings});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: SettingsPage(settings: settings),
);
}
}
class SettingsPage extends StatefulWidget {
final MySettings settings;
SettingsPage({required this.settings});
@override
_SettingsPageState createState() => _SettingsPageState();
}
class _SettingsPageState extends State<SettingsPage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Settings'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
Text('Some Setting: ${widget.settings.someSetting}'),
Switch(
value: widget.settings.anotherSetting,
onChanged: (value) {
setState(() {
widget.settings.anotherSetting = value;
widget.settings.save();
});
},
),
],
),
),
);
}
}
这样，你就可以在Flutter应用中使用clean_settings_nnbd插件来管理你的设置了。
