> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/caf-sdk-pt-br/ios/standalone-modules/document-detector/start-sdk.md).

# Iniciar detecção de documentos

Para obter o resultado, você deve implementar o **`DocumentDetectorControllerDelegate`** delegate no seu controlador:

```swift
class YouController: UIViewController, DocumentDetectorControllerDelegate{
    
    // MARK: - Delegados de Detecção de Documento
    
    func documentDetectionController(_ scanner: DocumentDetectorController, didFinishWithResults results: DocumentDetectorResult) {
        //Chamado quando o processo foi executado com sucesso
        //A variável result contém os dados obtidos
    }
    
    func documentDetectionControllerDidCancel(_ scanner: DocumentDetectorController) {
        // Chamado quando o usuário cancelar
    }
    
    func documentDetectionController(_ scanner: DocumentDetectorController, didFailWithError error: DocumentDetectorFailure) {
        //Chamado quando o processo termina com um erro
        //A variável error contém informações sobre o erro
    }
}
```

Depois de criar o **`DocumentDetector`** objeto, inicie o **`DocumentDetectorController`** passando este objeto como parâmetro no construtor:

```swift
let scannerVC = DocumentDetectorController(documentDetector: documentDetector)
scannerVC.documentDetectorDelegate = self
present(scannerVC, animated: true, completion: nil)
```


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