Flutter云服务客户端插件zycloud_client的使用

zycloud_client 是一个 Flutter 插件，用于与 ZYCloud 云服务进行交互。它提供了一系列 API，方便开发者在 Flutter 应用中集成 ZYCloud 的功能，例如文件上传、下载、管理、用户认证等。

安装

首先，你需要在 pubspec.yaml 文件中添加 zycloud_client 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  zycloud_client: ^1.0.0  # 请根据实际情况填写版本号

然后运行 flutter pub get 来安装依赖。

初始化

在使用 zycloud_client 之前，你需要初始化插件。通常，你需要在应用的 main 函数中进行初始化：

import 'package:zycloud_client/zycloud_client.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  // 初始化 ZYCloud 客户端
  await ZyCloudClient.initialize(
    apiKey: 'YOUR_API_KEY',
    secretKey: 'YOUR_SECRET_KEY',
  );

  runApp(MyApp());
}

常用功能

1. 用户认证

zycloud_client 提供了用户认证的相关方法，例如登录、注册、注销等。

// 用户登录
final user = await ZyCloudClient.instance.login(
  email: 'user@example.com',
  password: 'password',
);

// 用户注册
final newUser = await ZyCloudClient.instance.register(
  email: 'newuser@example.com',
  password: 'password',
);

// 用户注销
await ZyCloudClient.instance.logout();

2. 文件上传

你可以使用 zycloud_client 将文件上传到 ZYCloud 云存储。

final file = File('path/to/your/file.txt');

final uploadResponse = await ZyCloudClient.instance.uploadFile(
  file: file,
  path: '/uploads/file.txt',
);

print('File uploaded: ${uploadResponse.url}');

3. 文件下载

同样，你可以从 ZYCloud 下载文件到本地。

final downloadResponse = await ZyCloudClient.instance.downloadFile(
  path: '/uploads/file.txt',
  savePath: 'path/to/save/file.txt',
);

print('File downloaded: ${downloadResponse.filePath}');

4. 文件管理

zycloud_client 还提供了文件管理功能，例如列出文件、删除文件等。

// 列出文件
final files = await ZyCloudClient.instance.listFiles(path: '/uploads');

// 删除文件
await ZyCloudClient.instance.deleteFile(path: '/uploads/file.txt');

错误处理

在使用 zycloud_client 时，可能会遇到各种错误，例如网络错误、认证失败等。你可以使用 try-catch 来捕获并处理这些错误。

try {
  final user = await ZyCloudClient.instance.login(
    email: 'user@example.com',
    password: 'password',
  );
} catch (e) {
  print('Login failed: $e');
}

示例应用

以下是一个简单的示例应用，展示了如何使用 zycloud_client 进行文件上传和下载：

import 'package:flutter/material.dart';
import 'package:zycloud_client/zycloud_client.dart';
import 'dart:io';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await ZyCloudClient.initialize(
    apiKey: 'YOUR_API_KEY',
    secretKey: 'YOUR_SECRET_KEY',
  );
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: FileUploadDownloadPage(),
    );
  }
}

class FileUploadDownloadPage extends StatefulWidget {
  [@override](/user/override)
  _FileUploadDownloadPageState createState() => _FileUploadDownloadPageState();
}

class _FileUploadDownloadPageState extends State<FileUploadDownloadPage> {
  String _uploadStatus = '';
  String _downloadStatus = '';

  Future<void> _uploadFile() async {
    final file = File('path/to/your/file.txt');
    try {
      final response = await ZyCloudClient.instance.uploadFile(
        file: file,
        path: '/uploads/file.txt',
      );
      setState(() {
        _uploadStatus = 'File uploaded: ${response.url}';
      });
    } catch (e) {
      setState(() {
        _uploadStatus = 'Upload failed: $e';
      });
    }
  }

  Future<void> _downloadFile() async {
    try {
      final response = await ZyCloudClient.instance.downloadFile(
        path: '/uploads/file.txt',
        savePath: 'path/to/save/file.txt',
      );
      setState(() {
        _downloadStatus = 'File downloaded: ${response.filePath}';
      });
    } catch (e) {
      setState(() {
        _downloadStatus = 'Download failed: $e';
      });
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('ZYCloud File Upload/Download'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ElevatedButton(
              onPressed: _uploadFile,
              child: Text('Upload File'),
            ),
            Text(_uploadStatus),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: _downloadFile,
              child: Text('Download File'),
            ),
            Text(_downloadStatus),
          ],
        ),
      ),
    );
  }
}