isSigned property

bool get isSigned

Checks whether the signature field is signed or not.

// Load the existing PDF document.
PdfDocument document =
    PdfDocument(inputBytes: File('input.pdf').readAsBytesSync());
// Create a new PDF document.
PdfSignatureField field = document.form.fields[0] as PdfSignatureField;
// Check if field is signed.
bool isSigned = field.isSigned;
// Dispose the document.
document.dispose();

Implementation

bool get isSigned => _helper.isLoadedSign;