为local_auth添加自定义对话框的过程中,需要按照以下步骤进行操作:
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:local_auth/local_auth.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Local Auth Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Local Auth Demo'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final LocalAuthentication _localAuth = LocalAuthentication();
String _authStatus = '未认证';
Future<void> _authenticate() async {
bool authenticated = false;
try {
authenticated = await _localAuth.authenticate(
localizedReason: '进行生物识别或设备认证',
useErrorDialogs: false, // 禁用原生对话框
// 增加自定义对话框
customUI: Platform.isIOS
? CupertinoAuthDialog(authButtonText: '认证')
: MaterialAuthDialog(authButtonText: '认证'),
);
} on PlatformException catch (e) {
print(e);
}
if (!mounted) return;
setState(() {
_authStatus = authenticated ? '认证成功' : '认证失败';
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'认证状态: $_authStatus',
),
SizedBox(height: 20),
RaisedButton(
child: Text('进行认证'),
onPressed: _authenticate,
),
],
),
),
);
}
}
// 自定义iOS风格的认证对话框
class CupertinoAuthDialog extends StatelessWidget {
final String authButtonText;
const CupertinoAuthDialog({Key key, this.authButtonText}) : super(key: key);
@override
Widget build(BuildContext context) {
return CupertinoAlertDialog(
title: Text('认证'),
content: Text('进行生物识别或设备认证'),
actions: [
FlatButton(
child: Text(authButtonText),
onPressed: () {
Navigator.of(context).pop(true);
},
),
],
);
}
}
// 自定义Material风格的认证对话框
class MaterialAuthDialog extends StatelessWidget {
final String authButtonText;
const MaterialAuthDialog({Key key, this.authButtonText}) : super(key: key);
@override
Widget build(BuildContext context) {
return AlertDialog(
title: Text('认证'),
content: Text('进行生物识别或设备认证'),
actions: [
FlatButton(
child: Text(authButtonText),
onPressed: () {
Navigator.of(context).pop(true);
},
),
],
);
}
}
注意:以上代码示例中没有提及具体的腾讯云产品,如有需要,可以根据具体场景选择适合的腾讯云产品来替换相关代码部分。
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