flutter-swift-documentscan：Flutter + Swift VisionKit 文档扫描示例

lib/
├── main.dart              # 主应用入口，包含 Method Channel 调用示例
ios/
├── Runner/
│   └── AppDelegate.swift  # iOS 原生 Method Channel 处理器

// 定义 Method Channel（与 iOS 端保持一致）
final platform = const MethodChannel("com.flutter.baristikir/baristikir");

// 调用 iOS VisionKit 文档扫描
Future<List<String>> _scanDocument() async {
  List<dynamic> images = await platform.invokeMethod("SDScanDocument");
  return images.map((e) => e.toString()).toList();
}

// 下载 PDF 文件
Future<File> _downloadFile(String url, String filename) async {
  http.Client _client = new http.Client();
  var req = await _client.get(Uri.parse(url));
  var bytes = req.bodyBytes;
  String dir = (await getApplicationDocumentsDirectory()).path;
  File file = new File('$dir/$filename');
  await file.writeAsBytes(bytes);
  return file;
}

// 调用 iOS AirPrint 打印
Future<void> _printDocument(String b64Bytes, String filePath) async {
  var e = await platform.invokeMethod("SDPrintPDF", {"bytes": b64Bytes});
}

// 使用 flutter_secure_storage 包操作 iOS Keychain
final _storage = SecureKeychainService();

void _addToKeychain(String key, String value) async {
  await _storage.write(key: key, value: value, iosOptions: _getIOSOptions());
}

void _readFromKeychain(String key) async {
  await _storage.read(key: key, iosOptions: _getIOSOptions());
}

void _removeFromKeychain(String key) async {
  await _storage.delete(key: key, iosOptions: _getIOSOptions());
}

# 克隆项目
git clone https://github.com/baristikir/flutter-swift-documentscan.git
cd flutter-swift-documentscan

# 安装依赖
flutter pub get

# 进入 iOS 目录安装 Pod
cd ios && pod install && cd ..

# 运行应用
flutter run

platform :ios, '13.0'