用 Flutter 构建一个用户管理应用

本教程演示了如何构建一个基本的用户管理应用。该应用可以进行用户认证和识别，将用户的个人资料信息存储在数据库中，并允许用户登录、更新他们的个人资料信息以及上传头像。该应用使用了：

🌐 This tutorial demonstrates how to build a basic user management app. The app authenticates and identifies the user, stores their profile information in the database, and allows the user to log in, update their profile details, and upload a profile photo. The app uses:

Supabase 数据库 - 一个用于存储用户数据的 Postgres 数据库，并且有行级安全，所以数据是受保护的，用户只能访问自己的信息。
Supabase Auth - 允许用户注册和登录。
Supabase 存储 - 允许用户上传个人头像。

Supabase User Management example

如果你在使用本指南的过程中遇到困难，可以参考 GitHub 上的完整示例。

🌐 If you get stuck while working through this guide, refer to the full example on GitHub.

项目设置 #

🌐 Project setup

在你开始构建之前，你需要先设置数据库和 API。你可以通过在 Supabase 中启动一个新项目，然后在数据库中创建一个“架构”来完成这一步。

🌐 Before you start building you need to set up the Database and API. You can do this by starting a new Project in Supabase and then creating a "schema" inside the database.

创建一个项目 #

🌐 Create a project

在 Supabase 仪表板中创建一个新项目。
输入你的项目详情。
等新数据库上线。

设置数据库模式 #

🌐 Set up the database schema

现在设置数据库模式。你可以在 SQL 编辑器中使用“用户管理入门”快速开始，也可以复制粘贴下面的 SQL 并运行。

🌐 Now set up the database schema. You can use the "User Management Starter" quickstart in the SQL Editor, or you can copy/paste the SQL from below and run it.

在仪表板中转到SQL 编辑器页面。
点击 社区 > 快速入门 标签下的 用户管理入门。
点击运行。

你可以通过运行 db pull 命令将数据库架构拉到本地项目。查看本地开发文档获取详细说明。

🌐 You can pull the database schema down to your local project by running the db pull command. Read the local development docs for detailed instructions.

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supabase link --project-ref <project-id>
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# You can get <project-id> from your project's dashboard URL: https://supabase.com/dashboard/project/<project-id>
3
supabase db pull

获取 API 详情 #

🌐 Get API details

要与数据库表中的数据进行交互，你可以使用封装了自动生成的数据 API 端点的客户端库，并使用来自项目 Connect 对话框的项目 URL 和密钥进行认证。

🌐 To interact with data in database tables, you use the client libraries that wrap the auto-generated Data API endpoints, authenticating using the Project URL and key from the project Connect dialog.

Project URL

Publishable key

阅读 API 密钥文档以全面了解所有密钥类型、用途以及在哪里可以找到它们。

正在构建应用 #

🌐 Building the app

从零开始构建 Flutter 应用。

🌐 Build the Flutter app from scratch.

初始化一个 Flutter 应用 #

🌐 Initialize a Flutter app

我们可以使用flutter create来初始化一个名为supabase_quickstart的应用：

🌐 We can use flutter create to initialize an app called supabase_quickstart:

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flutter create supabase_quickstart

然后安装唯一的额外依赖：supabase_flutter

🌐 Then install the only additional dependency: supabase_flutter

将以下内容复制并粘贴到你的 pubspec.yaml 中以安装该包：

🌐 Copy and paste the following line in your pubspec.yaml to install the package:

1
supabase_flutter: ^2.0.0

运行 flutter pub get 来安装依赖。

🌐 Run flutter pub get to install the dependencies.

设置深度链接 #

🌐 Setup deep links

安装依赖后，设置深度链接。设置深度链接是必要的，当用户点击魔法链接登录时，能够把他们带回应用。我们可以通过在 Flutter 应用上做一个小调整来设置深度链接。

🌐 With dependencies installed, set up deep links. Setting up deep links is required to bring back the user to the app when they click on the magic link to sign in. We can setup deep links with a minor tweak on our Flutter application.

我们必须使用 io.supabase.flutterquickstart 作为方案。在这个例子中，我们将使用 login-callback 作为深度链接的主机，但你可以随意更改它。

🌐 We have to use io.supabase.flutterquickstart as the scheme. In this example, we will use login-callback as the host for our deep link, but you can change it to whatever you would like.

首先，在控制面板中将 io.supabase.flutterquickstart://login-callback/ 添加为新的重定向网址。

🌐 First, add io.supabase.flutterquickstart://login-callback/ as a new redirect URL in the Dashboard.

Supabase console deep link setting

Supabase 这边就这样，剩下的都是平台特定的设置：

🌐 That is it on Supabase's end and the rest are platform specific settings:

Edit the ios/Runner/Info.plist file.

添加 CFBundleURLTypes 来启用深度链接：

🌐 Add CFBundleURLTypes to enable deep linking:

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<!-- ... other tags -->
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<plist>
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<dict>
4
  <!-- ... other tags -->
5
6
  <!-- Add this array for Deep Links -->
7
  <key>CFBundleURLTypes</key>
8
  <array>
9
    <dict>
10
      <key>CFBundleTypeRole</key>
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      <string>Editor</string>
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      <key>CFBundleURLSchemes</key>
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      <array>
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        <string>io.supabase.flutterquickstart</string>
15
      </array>
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    </dict>
17
  </array>
18
  <!-- ... other tags -->
19
</dict>
20
</plist>

主函数 #

🌐 Main function

在配置好深层链接后，在 main 函数中使用你之前复制的 API 凭据初始化 Supabase 客户端。这些变量会在应用中暴露出来，这完全没问题，因为我们的数据库已经启用了行级安全。

🌐 With deep links configured, initialize the Supabase client inside the main function with the API credentials that you copied earlier. These variables will be exposed on the app, and that's completely fine since we have Row Level Security enabled on our Database.

1
import 'package:flutter/material.dart';
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import 'package:supabase_flutter/supabase_flutter.dart';
3
4
Future<void> main() async {
5
  await Supabase.initialize(
6
    url: 'YOUR_SUPABASE_URL',
7
    publishableKey: 'YOUR_SUPABASE_PUBLISHABLE_KEY',
8
  );
9
  runApp(const MyApp());
10
}
11
12
final supabase = Supabase.instance.client;
13
14
class MyApp extends StatelessWidget {
15
  const MyApp({super.key});
16
17
  @override
18
  Widget build(BuildContext context) {
19
    return const MaterialApp(title: 'Supabase Flutter');
20
  }
21
}
22
23
extension ContextExtension on BuildContext {
24
  void showSnackBar(String message, {bool isError = false}) {
25
    ScaffoldMessenger.of(this).showSnackBar(
26
      SnackBar(
27
        content: Text(message),
28
        backgroundColor: isError
29
            ? Theme.of(this).colorScheme.error
30
            : Theme.of(this).snackBarTheme.backgroundColor,
31
      ),
32
    );
33
  }
34
}

注意，我们有一个 showSnackBar 扩展方法，将用来在应用中显示小吃条。你可以在一个单独的文件中定义这个方法，并在需要的地方导入，但为了简单起见，我们将在这里定义它。

🌐 Notice that we have a showSnackBar extension method that we will use to show snack bars in the app. You could define this method in a separate file and import it where needed, but for simplicity, we will define it here.

🌐 Set up a login page

创建一个 Flutter 小部件来管理登录和注册。我们将使用魔法链接，这样用户可以通过电子邮件登录，而无需使用密码。

🌐 Create a Flutter widget to manage logins and sign ups. We will use Magic Links, so users can sign in with their email without using passwords.

注意，这个页面使用 onAuthStateChange 设置了一个监听器来监听用户的认证状态。当用户通过点击他们的魔法链接重新回到应用时，会触发一个新事件，这个页面可以捕捉到并相应地重定向用户。

🌐 Notice that this page sets up a listener on the user's auth state using onAuthStateChange. A new event will fire when the user comes back to the app by clicking their magic link, which this page can catch and redirect the user accordingly.

1
import 'dart:async';
2
3
import 'package:flutter/foundation.dart';
4
import 'package:flutter/material.dart';
5
import 'package:supabase_flutter/supabase_flutter.dart';
6
import 'package:supabase_quickstart/main.dart';
7
import 'package:supabase_quickstart/pages/account_page.dart';
8
9
class LoginPage extends StatefulWidget {
10
  const LoginPage({super.key});
11
12
  @override
13
  State<LoginPage> createState() => _LoginPageState();
14
}
15
16
class _LoginPageState extends State<LoginPage> {
17
  bool _isLoading = false;
18
  bool _redirecting = false;
19
  late final TextEditingController _emailController = TextEditingController();
20
  late final StreamSubscription<AuthState> _authStateSubscription;
21
22
  Future<void> _signIn() async {
23
    try {
24
      setState(() {
25
        _isLoading = true;
26
      });
27
      await supabase.auth.signInWithOtp(
28
        email: _emailController.text.trim(),
29
        emailRedirectTo:
30
            kIsWeb ? null : 'io.supabase.flutterquickstart://login-callback/',
31
      );
32
      if (mounted) {
33
        context.showSnackBar('Check your email for a login link!');
34
35
        _emailController.clear();
36
      }
37
    } on AuthException catch (error) {
38
      if (mounted) context.showSnackBar(error.message, isError: true);
39
    } catch (error) {
40
      if (mounted) {
41
        context.showSnackBar('Unexpected error occurred', isError: true);
42
      }
43
    } finally {
44
      if (mounted) {
45
        setState(() {
46
          _isLoading = false;
47
        });
48
      }
49
    }
50
  }
51
52
  @override
53
  void initState() {
54
    _authStateSubscription = supabase.auth.onAuthStateChange.listen(
55
      (data) {
56
        if (_redirecting) return;
57
        final session = data.session;
58
        if (session != null) {
59
          _redirecting = true;
60
          Navigator.of(context).pushReplacement(
61
            MaterialPageRoute(builder: (context) => const AccountPage()),
62
          );
63
        }
64
      },
65
      onError: (error) {
66
        if (error is AuthException) {
67
          context.showSnackBar(error.message, isError: true);
68
        } else {
69
          context.showSnackBar('Unexpected error occurred', isError: true);
70
        }
71
      },
72
    );
73
    super.initState();
74
  }
75
76
  @override
77
  void dispose() {
78
    _emailController.dispose();
79
    _authStateSubscription.cancel();
80
    super.dispose();
81
  }
82
83
  @override
84
  Widget build(BuildContext context) {
85
    return Scaffold(
86
      appBar: AppBar(title: const Text('Sign In')),
87
      body: ListView(
88
        padding: const EdgeInsets.symmetric(vertical: 18, horizontal: 12),
89
        children: [
90
          const Text('Sign in via the magic link with your email below'),
91
          const SizedBox(height: 18),
92
          TextFormField(
93
            controller: _emailController,
94
            decoration: const InputDecoration(labelText: 'Email'),
95
          ),
96
          const SizedBox(height: 18),
97
          ElevatedButton(
98
            onPressed: _isLoading ? null : _signIn,
99
            child: Text(_isLoading ? 'Sending...' : 'Send Magic Link'),
100
          ),
101
        ],
102
      ),
103
    );
104
  }
105
}

设置账户页面 #

🌐 Set up account page

用户登录后，我们可以允许他们编辑个人资料信息并管理账户。创建一个名为 account_page.dart 的新小部件。

🌐 After a user is signed in we can allow them to edit their profile details and manage their account. Create a new widget called account_page.dart.

1
import 'package:flutter/material.dart';
2
import 'package:supabase_flutter/supabase_flutter.dart';
3
import 'package:supabase_quickstart/main.dart';
4
import 'package:supabase_quickstart/pages/login_page.dart';
5
6
class AccountPage extends StatefulWidget {
7
  const AccountPage({super.key});
8
9
  @override
10
  State<AccountPage> createState() => _AccountPageState();
11
}
12
13
class _AccountPageState extends State<AccountPage> {
14
  final _usernameController = TextEditingController();
15
  final _websiteController = TextEditingController();
16
17
  String? _avatarUrl;
18
  var _loading = true;
19
20
  /// Called once a user id is received within `onAuthenticated()`
21
  Future<void> _getProfile() async {
22
    setState(() {
23
      _loading = true;
24
    });
25
26
    try {
27
      final userId = supabase.auth.currentSession!.user.id;
28
      final data =
29
          await supabase.from('profiles').select().eq('id', userId).single();
30
      _usernameController.text = (data['username'] ?? '') as String;
31
      _websiteController.text = (data['website'] ?? '') as String;
32
      _avatarUrl = (data['avatar_url'] ?? '') as String;
33
    } on PostgrestException catch (error) {
34
      if (mounted) context.showSnackBar(error.message, isError: true);
35
    } catch (error) {
36
      if (mounted) {
37
        context.showSnackBar('Unexpected error occurred', isError: true);
38
      }
39
    } finally {
40
      if (mounted) {
41
        setState(() {
42
          _loading = false;
43
        });
44
      }
45
    }
46
  }
47
48
  /// Called when user taps `Update` button
49
  Future<void> _updateProfile() async {
50
    setState(() {
51
      _loading = true;
52
    });
53
    final userName = _usernameController.text.trim();
54
    final website = _websiteController.text.trim();
55
    final user = supabase.auth.currentUser;
56
    final updates = {
57
      'id': user!.id,
58
      'username': userName,
59
      'website': website,
60
      'updated_at': DateTime.now().toIso8601String(),
61
    };
62
    try {
63
      await supabase.from('profiles').upsert(updates);
64
      if (mounted) context.showSnackBar('Successfully updated profile!');
65
    } on PostgrestException catch (error) {
66
      if (mounted) context.showSnackBar(error.message, isError: true);
67
    } catch (error) {
68
      if (mounted) {
69
        context.showSnackBar('Unexpected error occurred', isError: true);
70
      }
71
    } finally {
72
      if (mounted) {
73
        setState(() {
74
          _loading = false;
75
        });
76
      }
77
    }
78
  }
79
80
  Future<void> _signOut() async {
81
    try {
82
      await supabase.auth.signOut();
83
    } on AuthException catch (error) {
84
      if (mounted) context.showSnackBar(error.message, isError: true);
85
    } catch (error) {
86
      if (mounted) {
87
        context.showSnackBar('Unexpected error occurred', isError: true);
88
      }
89
    } finally {
90
      if (mounted) {
91
        Navigator.of(context).pushReplacement(
92
          MaterialPageRoute(builder: (_) => const LoginPage()),
93
        );
94
      }
95
    }
96
  }
97
98
  @override
99
  void initState() {
100
    super.initState();
101
    _getProfile();
102
  }
103
104
  @override
105
  void dispose() {
106
    _usernameController.dispose();
107
    _websiteController.dispose();
108
    super.dispose();
109
  }
110
111
  @override
112
  Widget build(BuildContext context) {
113
    return Scaffold(
114
      appBar: AppBar(title: const Text('Profile')),
115
      body: ListView(
116
        padding: const EdgeInsets.symmetric(vertical: 18, horizontal: 12),
117
        children: [
118
          TextFormField(
119
            controller: _usernameController,
120
            decoration: const InputDecoration(labelText: 'User Name'),
121
          ),
122
          const SizedBox(height: 18),
123
          TextFormField(
124
            controller: _websiteController,
125
            decoration: const InputDecoration(labelText: 'Website'),
126
          ),
127
          const SizedBox(height: 18),
128
          ElevatedButton(
129
            onPressed: _loading ? null : _updateProfile,
130
            child: Text(_loading ? 'Saving...' : 'Update'),
131
          ),
132
          const SizedBox(height: 18),
133
          TextButton(onPressed: _signOut, child: const Text('Sign Out')),
134
        ],
135
      ),
136
    );
137
  }
138
}

触发！ #

🌐 Launch!

所有组件就位后，更新 lib/main.dart。 MaterialApp 的 home，也就是显示给用户的初始页面，如果用户未认证，将是 LoginPage，如果用户已认证，则为 AccountPage。我们还加入了一些主题，让应用看起来更好看一些。

🌐 With all components in place, update lib/main.dart. The home of the MaterialApp, meaning the initial page shown to the user, will be the LoginPage if the user is not authenticated, and the AccountPage if the user is authenticated. We also included some theming to make the app look a bit nicer.

1
import 'package:flutter/material.dart';
2
import 'package:supabase_flutter/supabase_flutter.dart';
3
import 'package:supabase_quickstart/pages/account_page.dart';
4
import 'package:supabase_quickstart/pages/login_page.dart';
5
6
Future<void> main() async {
7
  await Supabase.initialize(
8
    url: 'YOUR_SUPABASE_URL',
9
    publishableKey: 'YOUR_SUPABASE_PUBLISHABLE_KEY',
10
  );
11
  runApp(const MyApp());
12
}
13
14
final supabase = Supabase.instance.client;
15
16
class MyApp extends StatelessWidget {
17
  const MyApp({super.key});
18
19
  @override
20
  Widget build(BuildContext context) {
21
    return MaterialApp(
22
      title: 'Supabase Flutter',
23
      theme: ThemeData.dark().copyWith(
24
        primaryColor: Colors.green,
25
        textButtonTheme: TextButtonThemeData(
26
          style: TextButton.styleFrom(
27
            foregroundColor: Colors.green,
28
          ),
29
        ),
30
        elevatedButtonTheme: ElevatedButtonThemeData(
31
          style: ElevatedButton.styleFrom(
32
            foregroundColor: Colors.white,
33
            backgroundColor: Colors.green,
34
          ),
35
        ),
36
      ),
37
      home: supabase.auth.currentSession == null
38
          ? const LoginPage()
39
          : const AccountPage(),
40
    );
41
  }
42
}
43
44
extension ContextExtension on BuildContext {
45
  void showSnackBar(String message, {bool isError = false}) {
46
    ScaffoldMessenger.of(this).showSnackBar(
47
      SnackBar(
48
        content: Text(message),
49
        backgroundColor: isError
50
            ? Theme.of(this).colorScheme.error
51
            : Theme.of(this).snackBarTheme.backgroundColor,
52
      ),
53
    );
54
  }
55
}

一旦完成，就在终端窗口运行这个来在 Android 或 iOS 上启动：

🌐 Once that's done, run this in a terminal window to launch on Android or iOS:

1
flutter run

或者对于网页，运行以下命令在 localhost:3000 上启动它

🌐 Or for web, run the following command to launch it on localhost:3000

1
flutter run -d web-server --web-hostname localhost --web-port 3000

然后打开浏览器访问 localhost:3000，你应该能看到完成的应用。

🌐 And then open the browser to localhost:3000 and you should see the completed app.

Supabase User Management example

额外奖励：头像 #

🌐 Bonus: Profile photos

每个 Supabase 项目都配置了 Storage，用于管理像照片和视频这样的大文件。

🌐 Every Supabase project is configured with Storage for managing large files like photos and videos.

确保我们有一个公共存储桶 #

🌐 Making sure we have a public bucket

我们会将图片存储为可公开分享的图片。确保你的 avatars 桶已设置为公开，如果没有，可以通过将鼠标悬停在桶名上出现的点菜单来更改公开设置。如果你的桶已设置为公开，你应该会在桶名旁看到一个橙色的 Public 徽章。

🌐 We will be storing the image as a publicly sharable image. Make sure your avatars bucket is set to public, and if it is not, change the publicity by clicking the dot menu that appears when you hover over the bucket name. You should see an orange Public badge next to your bucket name if your bucket is set to public.

在账户页面添加图片上传功能 #

🌐 Adding image uploading feature to account page

我们将使用image_picker 插件从设备中选择一张图片。

🌐 We will use image_picker plugin to select an image from the device.

在你的 pubspec.yaml 文件中添加以下这一行来安装 image_picker：

🌐 Add the following line in your pubspec.yaml file to install image_picker:

1
image_picker: ^1.0.5

使用 image_picker 需要根据不同平台做一些额外的准备。按照 image_picker 的 README.md 中的说明，了解如何为你使用的平台进行设置。

🌐 Using image_picker requires some additional preparation depending on the platform. Follow the instruction on README.md of image_picker on how to set it up for the platform you are using.

一旦把上面所有的都做完，就可以开始写代码了。

🌐 Once you are done with all of the above, it is time to dive into coding.

🌐 Create an upload widget

创建一个头像，这样用户就可以上传个人照片。我们可以先从创建一个新组件开始：

🌐 Create an avatar so the user can upload a profile photo. We can start by creating a new component:

1
import 'package:flutter/material.dart';
2
import 'package:image_picker/image_picker.dart';
3
import 'package:supabase_flutter/supabase_flutter.dart';
4
import 'package:supabase_quickstart/main.dart';
5
6
class Avatar extends StatefulWidget {
7
  const Avatar({
8
    super.key,
9
    required this.imageUrl,
10
    required this.onUpload,
11
  });
12
13
  final String? imageUrl;
14
  final void Function(String) onUpload;
15
16
  @override
17
  State<Avatar> createState() => _AvatarState();
18
}
19
20
class _AvatarState extends State<Avatar> {
21
  bool _isLoading = false;
22
23
  @override
24
  Widget build(BuildContext context) {
25
    return Column(
26
      children: [
27
        if (widget.imageUrl == null || widget.imageUrl!.isEmpty)
28
          Container(
29
            width: 150,
30
            height: 150,
31
            color: Colors.grey,
32
            child: const Center(
33
              child: Text('No Image'),
34
            ),
35
          )
36
        else
37
          Image.network(
38
            widget.imageUrl!,
39
            width: 150,
40
            height: 150,
41
            fit: BoxFit.cover,
42
          ),
43
        ElevatedButton(
44
          onPressed: _isLoading ? null : _upload,
45
          child: const Text('Upload'),
46
        ),
47
      ],
48
    );
49
  }
50
51
  Future<void> _upload() async {
52
    final picker = ImagePicker();
53
    final imageFile = await picker.pickImage(
54
      source: ImageSource.gallery,
55
      maxWidth: 300,
56
      maxHeight: 300,
57
    );
58
    if (imageFile == null) {
59
      return;
60
    }
61
    setState(() => _isLoading = true);
62
63
    try {
64
      final bytes = await imageFile.readAsBytes();
65
      final fileExt = imageFile.path.split('.').last;
66
      final fileName = '${DateTime.now().toIso8601String()}.$fileExt';
67
      final filePath = fileName;
68
      await supabase.storage.from('avatars').uploadBinary(
69
            filePath,
70
            bytes,
71
            fileOptions: FileOptions(contentType: imageFile.mimeType),
72
          );
73
      final imageUrlResponse = await supabase.storage
74
          .from('avatars')
75
          .createSignedUrl(filePath, 60 * 60 * 24 * 365 * 10);
76
      widget.onUpload(imageUrlResponse);
77
    } on StorageException catch (error) {
78
      if (mounted) {
79
        context.showSnackBar(error.message, isError: true);
80
      }
81
    } catch (error) {
82
      if (mounted) {
83
        context.showSnackBar('Unexpected error occurred', isError: true);
84
      }
85
    }
86
87
    setState(() => _isLoading = false);
88
  }
89
}

🌐 Add the new widget

然后我们可以把这个小部件添加到账户页面上，并加入一些逻辑，以便用户上传新头像时更新 avatar_url。

🌐 And then we can add the widget to the Account page as well as some logic to update the avatar_url whenever the user uploads a new avatar.

1
import 'package:flutter/material.dart';
2
import 'package:supabase_flutter/supabase_flutter.dart';
3
import 'package:supabase_quickstart/components/avatar.dart';
4
import 'package:supabase_quickstart/main.dart';
5
import 'package:supabase_quickstart/pages/login_page.dart';
6
7
class AccountPage extends StatefulWidget {
8
  const AccountPage({super.key});
9
10
  @override
11
  State<AccountPage> createState() => _AccountPageState();
12
}
13
14
class _AccountPageState extends State<AccountPage> {
15
  final _usernameController = TextEditingController();
16
  final _websiteController = TextEditingController();
17
18
  String? _avatarUrl;
19
  var _loading = true;
20
21
  /// Called once a user id is received within `onAuthenticated()`
22
  Future<void> _getProfile() async {
23
    setState(() {
24
      _loading = true;
25
    });
26
27
    try {
28
      final userId = supabase.auth.currentSession!.user.id;
29
      final data =
30
          await supabase.from('profiles').select().eq('id', userId).single();
31
      _usernameController.text = (data['username'] ?? '') as String;
32
      _websiteController.text = (data['website'] ?? '') as String;
33
      _avatarUrl = (data['avatar_url'] ?? '') as String;
34
    } on PostgrestException catch (error) {
35
      if (mounted) context.showSnackBar(error.message, isError: true);
36
    } catch (error) {
37
      if (mounted) {
38
        context.showSnackBar('Unexpected error occurred', isError: true);
39
      }
40
    } finally {
41
      if (mounted) {
42
        setState(() {
43
          _loading = false;
44
        });
45
      }
46
    }
47
  }
48
49
  /// Called when user taps `Update` button
50
  Future<void> _updateProfile() async {
51
    setState(() {
52
      _loading = true;
53
    });
54
    final userName = _usernameController.text.trim();
55
    final website = _websiteController.text.trim();
56
    final user = supabase.auth.currentUser;
57
    final updates = {
58
      'id': user!.id,
59
      'username': userName,
60
      'website': website,
61
      'updated_at': DateTime.now().toIso8601String(),
62
    };
63
    try {
64
      await supabase.from('profiles').upsert(updates);
65
      if (mounted) context.showSnackBar('Successfully updated profile!');
66
    } on PostgrestException catch (error) {
67
      if (mounted) context.showSnackBar(error.message, isError: true);
68
    } catch (error) {
69
      if (mounted) {
70
        context.showSnackBar('Unexpected error occurred', isError: true);
71
      }
72
    } finally {
73
      if (mounted) {
74
        setState(() {
75
          _loading = false;
76
        });
77
      }
78
    }
79
  }
80
81
  Future<void> _signOut() async {
82
    try {
83
      await supabase.auth.signOut();
84
    } on AuthException catch (error) {
85
      if (mounted) context.showSnackBar(error.message, isError: true);
86
    } catch (error) {
87
      if (mounted) {
88
        context.showSnackBar('Unexpected error occurred', isError: true);
89
      }
90
    } finally {
91
      if (mounted) {
92
        Navigator.of(context).pushReplacement(
93
          MaterialPageRoute(builder: (_) => const LoginPage()),
94
        );
95
      }
96
    }
97
  }
98
99
  /// Called when image has been uploaded to Supabase storage from within Avatar widget
100
  Future<void> _onUpload(String imageUrl) async {
101
    try {
102
      final userId = supabase.auth.currentUser!.id;
103
      await supabase.from('profiles').upsert({
104
        'id': userId,
105
        'avatar_url': imageUrl,
106
      });
107
      if (mounted) {
108
        const SnackBar(
109
          content: Text('Updated your profile image!'),
110
        );
111
      }
112
    } on PostgrestException catch (error) {
113
      if (mounted) context.showSnackBar(error.message, isError: true);
114
    } catch (error) {
115
      if (mounted) {
116
        context.showSnackBar('Unexpected error occurred', isError: true);
117
      }
118
    }
119
    if (!mounted) {
120
      return;
121
    }
122
123
    setState(() {
124
      _avatarUrl = imageUrl;
125
    });
126
  }
127
128
  @override
129
  void initState() {
130
    super.initState();
131
    _getProfile();
132
  }
133
134
  @override
135
  void dispose() {
136
    _usernameController.dispose();
137
    _websiteController.dispose();
138
    super.dispose();
139
  }
140
141
  @override
142
  Widget build(BuildContext context) {
143
    return Scaffold(
144
      appBar: AppBar(title: const Text('Profile')),
145
      body: ListView(
146
        padding: const EdgeInsets.symmetric(vertical: 18, horizontal: 12),
147
        children: [
148
          Avatar(
149
            imageUrl: _avatarUrl,
150
            onUpload: _onUpload,
151
          ),
152
          const SizedBox(height: 18),
153
          TextFormField(
154
            controller: _usernameController,
155
            decoration: const InputDecoration(labelText: 'User Name'),
156
          ),
157
          const SizedBox(height: 18),
158
          TextFormField(
159
            controller: _websiteController,
160
            decoration: const InputDecoration(labelText: 'Website'),
161
          ),
162
          const SizedBox(height: 18),
163
          ElevatedButton(
164
            onPressed: _loading ? null : _updateProfile,
165
            child: Text(_loading ? 'Saving...' : 'Update'),
166
          ),
167
          const SizedBox(height: 18),
168
          TextButton(onPressed: _signOut, child: const Text('Sign Out')),
169
        ],
170
      ),
171
    );
172
  }
173
}

恭喜你，你已经用 Flutter 和 Supabase 搭建了一个功能齐全的用户管理应用！

🌐 Congratulations, you've built a fully functional user management app using Flutter and Supabase!

另请参阅 #

🌐 See also

用 Flutter 构建一个用户管理应用

项目设置 #

创建一个项目 #

设置数据库模式 #

获取 API 详情 #

正在构建应用 #

初始化一个 Flutter 应用 #

设置深度链接 #

主函数 #

设置账户页面 #

触发！ #

额外奖励：头像 #

确保我们有一个公共存储桶 #

在账户页面添加图片上传功能 #

创建一个上传小工具 #

添加新小部件 #

另请参阅 #

项目设置 #

创建一个项目 #

设置数据库模式 #

获取 API 详情 #

正在构建应用 #

初始化一个 Flutter 应用 #

设置深度链接 #

主函数 #

设置一个登录页面 #

设置账户页面 #

触发！ #

额外奖励：头像 #

确保我们有一个公共存储桶 #

在账户页面添加图片上传功能 #

创建一个上传小工具 #

添加新小部件 #

另请参阅 #