Flutter iCloud存储插件icloud_storage的使用

插件简介

icloud_storage 是一个Flutter插件，用于在iOS设备的应用iCloud容器中上传、下载和管理文件。用户生成并存储在<Application_Home>/Documents目录中的文档和其他数据可以自动备份到iCloud（如果开启了iCloud备份设置），并且可以在用户设置新设备或重置现有设备时恢复这些数据。如果您需要在上述场景之外进行备份和下载，这个插件可以提供帮助。

前提条件

为了使用此插件，您需要完成以下设置：

Apple开发者账户：拥有一个有效的Apple开发者账户。
创建App ID和iCloud容器ID：在Apple开发者中心为您的应用创建唯一的App ID，并为该应用创建一个iCloud容器ID。
启用iCloud功能并分配iCloud容器ID：确保在App ID中启用了iCloud功能，并正确指定了iCloud容器ID。
在Xcode中启用iCloud功能：打开项目，在Xcode中添加iCloud能力，并选择正确的iCloud容器。

有关更详细的设置说明，请参阅如何设置iCloud容器并启用该功能部分。

API 使用示例

获取iCloud文件列表

import 'package:icloud_storage/icloud_storage.dart';

Future<void> gatherFiles() async {
  try {
    final fileList = await ICloudStorage.gather(
      containerId: 'iCloudContainerId',
      onUpdate: (stream) {
        filesUpdateSub = stream.listen((updatedFileList) {
          print('FILES UPDATED');
          updatedFileList.forEach((file) => print('-- ${file.relativePath}'));
        });
      },
    );
    print('FILES GATHERED');
    fileList.forEach((file) => print('-- ${file.relativePath}'));
  } catch (err) {
    // 错误处理逻辑
  }
}

上传文件到iCloud

Future<void> uploadFile() async {
  try {
    await ICloudStorage.upload(
      containerId: 'iCloudContainerId',
      filePath: '/localDir/localFile',
      destinationRelativePath: 'destDir/destFile',
      onProgress: (stream) {
        uploadProgressSub = stream.listen(
          (progress) => print('Upload File Progress: $progress'),
          onDone: () => print('Upload File Done'),
          onError: (err) => print('Upload File Error: $err'),
          cancelOnError: true,
        );
      },
    );
  } catch (err) {
    // 错误处理逻辑
  }
}

下载文件从iCloud

Future<void> downloadFile() async {
  try {
    await ICloudStorage.download(
      containerId: 'iCloudContainerId',
      relativePath: 'relativePath',
      destinationFilePath: '/localDir/localFile',
      onProgress: (stream) {
        downloadProgressSub = stream.listen(
          (progress) => print('Download File Progress: $progress'),
          onDone: () => print('Download File Done'),
          onError: (err) => print('Download File Error: $err'),
          cancelOnError: true,
        );
      },
    );
  } catch (err) {
    // 错误处理逻辑
  }
}

删除iCloud中的文件

Future<void> deleteFile() async {
  try {
    await ICloudStorage.delete(
      containerId: 'iCloudContainerId',
      relativePath: 'relativePath'
    );
  } catch (err) {
    // 错误处理逻辑
  }
}

移动文件位置

Future<void> moveFile() async {
  try {
    await ICloudStorage.move(
      containerId: 'iCloudContainerId',
      fromRelativePath: 'dir/file',
      toRelativePath: 'dir/subdir/file',
    );
  } catch (err) {
    // 错误处理逻辑
  }
}

重命名文件

Future<void> renameFile() async {
  try {
    await ICloudStorage.rename(
      containerId: 'iCloudContainerId',
      relativePath: 'relativePath',
      newName: 'newName',
    );
  } catch (err) {
    // 错误处理逻辑
  }
}

示例Demo

下面是一个完整的Flutter应用程序示例，展示了如何集成icloud_storage插件以执行上述操作。本示例包含了导航到不同页面的功能，每个页面对应一种文件操作（获取文件列表、上传、下载、删除、移动和重命名）。

import 'package:flutter/material.dart';
import 'package:icloud_storage/icloud_storage.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(title: Text('iCloud Storage Example')),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              ElevatedButton(
                onPressed: () => Navigator.pushNamed(context, '/gather', arguments: 'iCloudContainerId'),
                child: Text('Gather Files'),
              ),
              ElevatedButton(
                onPressed: () => Navigator.pushNamed(context, '/upload', arguments: 'iCloudContainerId'),
                child: Text('Upload File'),
              ),
              ElevatedButton(
                onPressed: () => Navigator.pushNamed(context, '/download', arguments: 'iCloudContainerId'),
                child: Text('Download File'),
              ),
              ElevatedButton(
                onPressed: () => Navigator.pushNamed(context, '/delete', arguments: 'iCloudContainerId'),
                child: Text('Delete File'),
              ),
              ElevatedButton(
                onPressed: () => Navigator.pushNamed(context, '/move', arguments: 'iCloudContainerId'),
                child: Text('Move File'),
              ),
              ElevatedButton(
                onPressed: () => Navigator.pushNamed(context, '/rename', arguments: 'iCloudContainerId'),
                child: Text('Rename File'),
              ),
            ],
          ),
        ),
        onGenerateRoute: ((settings) {
          final args = settings.arguments as String;
          Widget page;
          switch (settings.name) {
            case '/gather':
              page = GatherPage(containerId: args);
              break;
            case '/upload':
              page = UploadPage(containerId: args);
              break;
            case '/download':
              page = DownloadPage(containerId: args);
              break;
            case '/delete':
              page = DeletePage(containerId: args);
              break;
            case '/move':
              page = MovePage(containerId: args);
              break;
            case '/rename':
              page = RenamePage(containerId: args);
              break;
            default:
              page = Container();
          }
          return MaterialPageRoute(builder: (_) => page);
        }),
      ),
    );
  }
}

// Gather Page
class GatherPage extends StatelessWidget {
  final String containerId;

  const GatherPage({Key? key, required this.containerId}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Gather Files')),
      body: FutureBuilder<List<ICloudFile>>(
        future: ICloudStorage.gather(containerId: containerId),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return Center(child: CircularProgressIndicator());
          } else if (snapshot.hasError) {
            return Center(child: Text('Error: ${snapshot.error}'));
          } else if (!snapshot.hasData || snapshot.data!.isEmpty) {
            return Center(child: Text('No files found.'));
          } else {
            return ListView.builder(
              itemCount: snapshot.data!.length,
              itemBuilder: (context, index) {
                final file = snapshot.data![index];
                return ListTile(title: Text(file.relativePath));
              },
            );
          }
        },
      ),
    );
  }
}

// Upload Page
class UploadPage extends StatefulWidget {
  final String containerId;

  const UploadPage({Key? key, required this.containerId}) : super(key: key);

  @override
  _UploadPageState createState() => _UploadPageState();
}

class _UploadPageState extends State<UploadPage> {
  StreamSubscription? uploadProgressSub;

  @override
  void dispose() {
    uploadProgressSub?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Upload File')),
      body: Center(
        child: ElevatedButton(
          onPressed: () async {
            try {
              await ICloudStorage.upload(
                containerId: widget.containerId,
                filePath: '/localDir/localFile',
                destinationRelativePath: 'destDir/destFile',
                onProgress: (stream) {
                  uploadProgressSub = stream.listen(
                    (progress) => print('Upload File Progress: $progress'),
                    onDone: () => print('Upload File Done'),
                    onError: (err) => print('Upload File Error: $err'),
                    cancelOnError: true,
                  );
                },
              );
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Upload completed')));
            } catch (err) {
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Upload failed: $err')));
            }
          },
          child: Text('Start Upload'),
        ),
      ),
    );
  }
}

// Download Page
class DownloadPage extends StatefulWidget {
  final String containerId;

  const DownloadPage({Key? key, required this.containerId}) : super(key: key);

  @override
  _DownloadPageState createState() => _DownloadPageState();
}

class _DownloadPageState extends State<DownloadPage> {
  StreamSubscription? downloadProgressSub;

  @override
  void dispose() {
    downloadProgressSub?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Download File')),
      body: Center(
        child: ElevatedButton(
          onPressed: () async {
            try {
              await ICloudStorage.download(
                containerId: widget.containerId,
                relativePath: 'relativePath',
                destinationFilePath: '/localDir/localFile',
                onProgress: (stream) {
                  downloadProgressSub = stream.listen(
                    (progress) => print('Download File Progress: $progress'),
                    onDone: () => print('Download File Done'),
                    onError: (err) => print('Download File Error: $err'),
                    cancelOnError: true,
                  );
                },
              );
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Download completed')));
            } catch (err) {
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Download failed: $err')));
            }
          },
          child: Text('Start Download'),
        ),
      ),
    );
  }
}

// Delete Page
class DeletePage extends StatelessWidget {
  final String containerId;

  const DeletePage({Key? key, required this.containerId}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Delete File')),
      body: Center(
        child: ElevatedButton(
          onPressed: () async {
            try {
              await ICloudStorage.delete(
                containerId: containerId,
                relativePath: 'relativePath'
              );
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Delete completed')));
            } catch (err) {
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Delete failed: $err')));
            }
          },
          child: Text('Delete File'),
        ),
      ),
    );
  }
}

// Move Page
class MovePage extends StatelessWidget {
  final String containerId;

  const MovePage({Key? key, required this.containerId}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Move File')),
      body: Center(
        child: ElevatedButton(
          onPressed: () async {
            try {
              await ICloudStorage.move(
                containerId: containerId,
                fromRelativePath: 'dir/file',
                toRelativePath: 'dir/subdir/file',
              );
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Move completed')));
            } catch (err) {
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Move failed: $err')));
            }
          },
          child: Text('Move File'),
        ),
      ),
    );
  }
}

// Rename Page
class RenamePage extends StatelessWidget {
  final String containerId;

  const RenamePage({Key? key, required this.containerId}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Rename File')),
      body: Center(
        child: ElevatedButton(
          onPressed: () async {
            try {
              await ICloudStorage.rename(
                containerId: containerId,
                relativePath: 'relativePath',
                newName: 'newName',
              );
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Rename completed')));
            } catch (err) {
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Rename failed: $err')));
            }
          },
          child: Text('Rename File'),
        ),
      ),
    );
  }
}

参考资料

以上内容涵盖了icloud_storage插件的主要用法以及如何在Flutter项目中集成它来实现iCloud文件操作。希望这对您有所帮助！

更多关于Flutter iCloud存储插件icloud_storage的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

gougou168 1楼•2 天前作者

更多关于Flutter iCloud存储插件icloud_storage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，下面是一个关于如何使用 icloud_storage 插件在 Flutter 中实现 iCloud 存储的示例代码。这个插件允许你在 iOS 设备上将文件保存到 iCloud。请注意，你需要先在 Flutter 项目中添加该插件。

1. 添加依赖

首先，在你的 pubspec.yaml 文件中添加 icloud_storage 依赖：

dependencies:
  flutter:
    sdk: flutter
  icloud_storage: ^最新版本号  # 请替换为最新版本号

然后运行 flutter pub get 来获取依赖。

2. 配置 iOS 项目

你需要确保你的 iOS 项目已经配置了 iCloud 功能。这通常涉及以下步骤：

打开 Xcode，选择你的项目。
在 Capabilities 标签页中，启用 iCloud。
配置 iCloud 容器（通常与你的 Bundle Identifier 相同）。

3. 使用 `icloud_storage` 插件

以下是一个示例代码，展示了如何使用 icloud_storage 插件来保存和读取文件到 iCloud。

import 'package:flutter/material.dart';
import 'package:icloud_storage/icloud_storage.dart';
import 'dart:typed_data';
import 'dart:convert';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _status = "Initial Status";

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('iCloud Storage Example'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(_status),
              SizedBox(height: 20),
              ElevatedButton(
                onPressed: _saveFileToICloud,
                child: Text('Save File to iCloud'),
              ),
              SizedBox(height: 20),
              ElevatedButton(
                onPressed: _readFileFromICloud,
                child: Text('Read File from iCloud'),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _saveFileToICloud() async {
    final String fileName = "example.txt";
    final String content = "Hello, iCloud!";
    final Uint8List data = Uint8List.fromList(utf8.encode(content));

    try {
      await ICloudStorage.saveFile(fileName, data);
      setState(() {
        _status = "File saved to iCloud successfully!";
      });
    } catch (e) {
      setState(() {
        _status = "Failed to save file to iCloud: ${e.message}";
      });
    }
  }

  Future<void> _readFileFromICloud() async {
    final String fileName = "example.txt";

    try {
      final Uint8List? fileData = await ICloudStorage.readFile(fileName);
      if (fileData != null) {
        final String content = utf8.decode(fileData);
        setState(() {
          _status = "File read from iCloud: $content";
        });
      } else {
        setState(() {
          _status = "File not found in iCloud.";
        });
      }
    } catch (e) {
      setState(() {
        _status = "Failed to read file from iCloud: ${e.message}";
      });
    }
  }
}

注意事项

权限处理：在实际应用中，你需要处理用户权限，确保用户已经授予你的应用访问 iCloud 的权限。
错误处理：示例代码中只简单地捕获了异常并更新了状态，实际应用中你可能需要更详细的错误处理逻辑。
文件大小限制：iCloud 存储有文件大小限制，请确保你的文件大小在限制范围内。

结论

以上代码展示了如何在 Flutter 应用中使用 icloud_storage 插件进行 iCloud 存储的基本操作。请确保你的 iOS 项目已经正确配置了 iCloud 功能，并根据需要调整代码以适应你的具体需求。

Flutter iCloud存储插件icloud_storage的使用

Flutter iCloud存储插件icloud_storage的使用

插件简介

前提条件

API 使用示例

获取iCloud文件列表

上传文件到iCloud

下载文件从iCloud

删除iCloud中的文件

移动文件位置

重命名文件

示例Demo

参考资料

1. 添加依赖

2. 配置 iOS 项目

3. 使用 icloud_storage 插件

注意事项

结论

3. 使用 `icloud_storage` 插件