How to create a PDF417 barcode
Swift version: 5.0
PDF417 barcodes - most frequently seen on boarding passes at airports, but also seen in digital postage stamps and other places – are built right into iOS. This function below accepts a string as its only parameter and returns a UIImage containing the PDF417 barcode representing that string:
func generatePDF417Barcode(from string: String) -> UIImage? {
let data = string.data(using: String.Encoding.ascii)
if let filter = CIFilter(name: "CIPDF417BarcodeGenerator") {
filter.setValue(data, forKey: "inputMessage")
let transform = CGAffineTransform(scaleX: 3, y: 3)
if let output = filter.outputImage?.transformed(by: transform) {
return UIImage(ciImage: output)
}
}
return nil
}
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Available from iOS 9.0
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