Class

CIQRCodeDescriptor

A concrete subclass of CIBarcodeDescriptor that represents a square QR code symbol.

Declaration

class CIQRCodeDescriptor : CIBarcodeDescriptor

Overview

ISO/IEC 18004 defines versions from 1 to 40, where a higher symbol version indicates a larger data-carrying capacity.

QR codes can encode text, vCard contact information, or Uniform Resource Identifiers (URI).

Topics

Creating a Descriptor

init?(payload: Data, symbolVersion: Int, maskPattern: UInt8, errorCorrectionLevel: CIQRCodeDescriptor.ErrorCorrectionLevel)

Initializes a descriptor that can be used as input to the CIBarcodeGenerator filter.

Examining a Descriptor

var errorCorrectedPayload: Data

The error-corrected payload containing the data encoded in the QR code.

var symbolVersion: Int

The version of the QR code.

var maskPattern: UInt8

The QR code's mask pattern.

var errorCorrectionLevel: CIQRCodeDescriptor.ErrorCorrectionLevel

The QR code error correction level.

Error Correction Constants

enum CIQRCodeDescriptor.ErrorCorrectionLevel

Constants that indicate the percentage of the symbol dedicated to error correction.

Relationships

Inherits From

Conforms To

See Also

Barcode Descriptions

class CIBarcodeDescriptor

An abstract base class that represents a machine readable code's attributes.

class CIAztecCodeDescriptor

A concrete subclass of CIBarcodeDescriptor that represents an Aztec code symbol.

class CIPDF417CodeDescriptor

A concrete subclass of CIBarcodeDescriptor that represents a PDF 417 symbol.

class CIDataMatrixCodeDescriptor

A concrete subclass of CIBarcodeDescriptor that represents a Data Matrix code symbol.