qr A constant that indicates Quick Response (QR) symbology. Declarationstatic let qr: VNBarcodeSymbology See AlsoSupported Symbologiesazteccodabarcode39code39Checksumcode39FullASCIIcode39FullASCIIChecksumcode93code93icode128dataMatrixean8ean13gs1DataBargs1DataBarExpandedgs1DataBarLimited