28 lines
1.3 KiB
Swift
28 lines
1.3 KiB
Swift
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enum QRCode {
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static func generate(for string: String, isInverted: Bool = false, hasBackground: Bool = false) -> UIImage {
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let data = string.data(using: .utf8)
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var qrCodeAsCIImage: CIImage
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let filter1 = CIFilter(name: "CIQRCodeGenerator")!
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filter1.setValue(data, forKey: "inputMessage")
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qrCodeAsCIImage = filter1.outputImage!
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if hasBackground {
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let filter2 = CIFilter(name: "CIFalseColor")!
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filter2.setValue(qrCodeAsCIImage, forKey: "inputImage")
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filter2.setValue(CIColor(color: UIColor(hex: isInverted ? 0xFFFFFF : 0x000000)), forKey: "inputColor0")
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filter2.setValue(CIColor(color: UIColor(hex: isInverted ? 0x1B1B1B : 0xFFFFFF)), forKey: "inputColor1")
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qrCodeAsCIImage = filter2.outputImage!
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} else {
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let filter2 = CIFilter(name: "CIColorInvert")!
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filter2.setValue(qrCodeAsCIImage, forKey: "inputImage")
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qrCodeAsCIImage = filter2.outputImage!
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let filter3 = CIFilter(name: "CIMaskToAlpha")!
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filter3.setValue(qrCodeAsCIImage, forKey: "inputImage")
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qrCodeAsCIImage = filter3.outputImage!
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}
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let scaledQRCodeAsCIImage = qrCodeAsCIImage.transformed(by: CGAffineTransform(scaleX: 6.4, y: 6.4))
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return UIImage(ciImage: scaledQRCodeAsCIImage)
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}
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}
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