Flutter本地身份验证插件local_auth_wall的使用
Flutter本地身份验证插件local_auth_wall的使用
Getting Started
local_auth_wall
是一个用于简化本地身份验证的 Flutter widget。它可以根据用户的认证状态重定向到不同的 widget。
iOS Integration
在 iOS 上集成时,需要添加以下权限描述:
<key>NSFaceIDUsageDescription</key>
<string>为什么我的应用需要使用面部识别进行身份验证?</string>
Android Integration
该插件可以在 SDK 16+ 上构建和运行,但在 SDK 23(Android 6.0)之前,isDeviceSupported()
将始终返回 false
。因此,你需要将你的 Activity 类型从 Activity
更改为 FlutterFragmentActivity
。
如果你直接使用 FlutterActivity
,则需要将其更改为 FlutterFragmentActivity
:
<!-- 在 AndroidManifest.xml 中 -->
<activity android:name=".MainActivity" />
如果你使用的是自定义的 Activity,需要更新 MainActivity.java
或 MainActivity.kt
文件:
// MainActivity.java
import io.flutter.embedding.android.FlutterFragmentActivity;
public class MainActivity extends FlutterFragmentActivity {
// ...
}
// MainActivity.kt
import io.flutter.embedding.android.FlutterFragmentActivity
class MainActivity: FlutterFragmentActivity() {
// ...
}
Permissions
在 AndroidManifest.xml
文件中添加以下权限:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">
<uses-permission android:name="android.permission.USE_BIOMETRIC"/>
</manifest>
Usage Example
在这个例子中,我们使用 MaterialApp.builder
来封装所有应用程序路由,并使用 ChangeNotifierProvider
来检查认证状态。
Basic usage
MaterialApp(
builder: (BuildContext, child) {
return LocalAuthWall(
appConf: {
AuthWallConfProperty.defaultHelpText: "请授权以访问。",
AuthWallConfProperty.autoAuthRootRoute: true,
AuthWallConfProperty.resetRootRouteOnAnyUnAuthorized: false,
},
stateWallWidgets: {
AuthWallDefaultStates.booting: OnBootState(),
AuthWallDefaultStates.unauthorized: NotAuthorizedState(),
AuthWallDefaultStates.unsupported: NotSupportedState(),
/// child 提供由 Flutter MaterialApp,通常是主页路由,在这种情况下是 MyHomePage
/// root 必须与默认路由名称匹配
AuthWallDefaultStates.defaultRoute: child ??
Container(
alignment: Alignment.center,
color: Colors.amber,
child: Text("Something is wrong, "
"where is my Home Widget??"),
)
},
);
},
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
Complete example (see the Example app)
import 'package:flutter/material.dart';
import 'package:local_auth_wall/local_auth_wall.dart';
import 'package:local_auth_wall/src/auth_wall_notifier.dart';
import 'package:provider/provider.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitDown, DeviceOrientation.portraitUp]);
runApp(MyApp());
}
/// 当未授权时显示的 widget
class NotAuthorizedState extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
primary: false,
body: Container(
color: Colors.blue,
alignment: Alignment.center,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text("请授权以访问"),
TextButton(
onPressed: () {
context.read<AuthWallNotifier>().authorizeRoute(
AuthWallDefaultStates.defaultRoute.toString(),
"请授权以访问");
},
child: Icon(Icons.security))
],
),
));
}
}
///
class OnBootState extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
primary: false,
body: Container(
color: Colors.orange,
alignment: Alignment.center,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text("请等待,正在检查硬件支持"),
],
),
));
}
}
/// 硬件要求不满足时显示的 widget
class NotSupportedState extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
primary: false,
body: Container(
color: Colors.blue,
alignment: Alignment.center,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text("抱歉,此设备不受支持,请使用以下替代方法进行身份验证"),
TextButton(
onPressed: () {
/// Call here...
},
child: Icon(Icons.security))
],
),
));
}
}
class MyApp extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
builder: (BuildContext, child) {
return LocalAuthWall(
appConf: {
AuthWallConfProperty.defaultHelpText: "请授权以访问。",
AuthWallConfProperty.autoAuthRootRoute: true,
AuthWallConfProperty.resetRootRouteOnAnyUnAuthorized: false,
},
stateWallWidgets: {
AuthWallDefaultStates.booting: OnBootState(),
AuthWallDefaultStates.unauthorized: NotAuthorizedState(),
AuthWallDefaultStates.unsupported: NotSupportedState(),
/// child 提供由 Flutter MaterialApp,通常是主页路由,在这种情况下是 MyHomePage
AuthWallDefaultStates.defaultRoute: child ??
Container(
alignment: Alignment.center,
color: Colors.amber,
child: Text("Something is wrong, "
"where is my Home Widget??"),
)
},
);
},
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'));
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, this.title}) : super(key: key);
final String? title;
[@override](/user/override)
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title!),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
TextButton(
onPressed: () {
context.read<AuthWallNotifier>().authorizeRoute(
AuthWallDefaultStates.defaultRoute.toString());
},
child: Text("Tap to authorize Default Route")),
Text(
'Default Route authorized: ${context.watch<AuthWallNotifier>().routeIsAuthorized(AuthWallDefaultStates.defaultRoute.toString())}',
),
Text(
'Hardware supported: ${context.watch<AuthWallNotifier>().isSupported}',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
context
.read<AuthWallNotifier>()
.authorizeRoute(
"show_ballance", "Please, authorize to see wallet balance")
.then((_) {
if (context
.read<AuthWallNotifier>()
.routeIsAuthorized("show_ballance")) {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
backgroundColor: Colors.green,
elevation: 4,
dismissDirection: DismissDirection.down,
content: SizedBox(
height: 60,
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Icon(Icons.security),
),
Expanded(
child: Text(
"Nice, authorized with success!",
style: TextStyle(fontSize: 18),
),
)
],
),
),
));
} else {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
backgroundColor: Colors.red,
elevation: 4,
dismissDirection: DismissDirection.down,
content: SizedBox(
height: 60,
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Icon(Icons.security),
),
Expanded(
child: Text(
"Sorry, NOT authorized with success!",
style: TextStyle(fontSize: 18),
),
)
],
),
),
));
}
});
},
tooltip: 'Balance',
child: Icon(Icons.balance),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
更多关于Flutter本地身份验证插件local_auth_wall的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter本地身份验证插件local_auth_wall的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
local_auth_wall
是一个基于 Flutter 的插件,用于在应用中添加本地身份验证(如指纹、面容识别等)的功能。它可以用来保护应用中的某些部分或整个应用,确保只有经过身份验证的用户才能访问。
以下是如何使用 local_auth_wall
插件的基本步骤:
1. 添加依赖
首先,你需要在 pubspec.yaml
文件中添加 local_auth_wall
插件的依赖:
dependencies:
flutter:
sdk: flutter
local_auth_wall: ^1.0.0 # 请检查最新版本
然后运行 flutter pub get
来获取依赖。
2. 导入插件
在你的 Dart 文件中导入 local_auth_wall
插件:
import 'package:local_auth_wall/local_auth_wall.dart';
3. 使用 LocalAuthWall
LocalAuthWall
是一个小部件,你可以将它包裹在你想要保护的 UI 部分。当用户尝试访问该部分时,系统会提示他们进行身份验证。
class ProtectedPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Protected Page'),
),
body: LocalAuthWall(
onSuccess: () {
// 身份验证成功后的回调
print('Authentication successful!');
},
onFailure: () {
// 身份验证失败后的回调
print('Authentication failed!');
},
child: Center(
child: Text('This content is protected by local authentication.'),
),
),
);
}
}
4. 配置本地身份验证
local_auth_wall
插件依赖于 local_auth
插件,因此你需要确保在 Android 和 iOS 上正确配置 local_auth
。
Android 配置
在 AndroidManifest.xml
文件中添加以下权限:
<uses-permission android:name="android.permission.USE_BIOMETRIC"/>
<uses-permission android:name="android.permission.USE_FINGERPRINT"/>
iOS 配置
在 Info.plist
文件中添加以下内容:
<key>NSFaceIDUsageDescription</key>
<string>We need to use Face ID to secure your data.</string>
5. 处理身份验证结果
LocalAuthWall
提供了 onSuccess
和 onFailure
回调函数,你可以在这些回调中处理身份验证成功或失败后的逻辑。
6. 自定义外观和行为
你可以通过传递额外的参数来自定义 LocalAuthWall
的外观和行为,例如:
authMessage
: 身份验证时显示的消息。cancelButton
: 取消按钮的文本。biometricOnly
: 是否仅使用生物识别(如指纹或面容识别)。
LocalAuthWall(
authMessage: 'Authenticate to access this content',
cancelButton: 'Cancel',
biometricOnly: true,
onSuccess: () {
// 身份验证成功后的回调
},
onFailure: () {
// 身份验证失败后的回调
},
child: Center(
child: Text('This content is protected by local authentication.'),
),
)