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Changelog-Added: Add QRCode view for sharing your pubkey Closes: #418translations_damus-localizations-en-us-xcloc-localized-contents-en-us-xliff--master_ar
ericholguin
2 years ago
committed by
William Casarin
William Casarin
3 changed files with 122 additions and 11 deletions
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// |
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// QRCodeView.swift |
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// damus |
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// |
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// Created by eric on 1/27/23. |
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// |
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import SwiftUI |
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import CoreImage.CIFilterBuiltins |
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struct QRCodeView: View { |
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let damus_state: DamusState |
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@Environment(\.dismiss) var dismiss |
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@Environment(\.presentationMode) var presentationMode |
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var maybe_key: String? { |
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guard let key = bech32_pubkey(damus_state.pubkey) else { |
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return nil |
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} |
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return key |
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} |
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var body: some View { |
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ZStack(alignment: .topLeading) { |
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DamusGradient() |
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Button { |
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presentationMode.wrappedValue.dismiss() |
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} label: { |
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Image(systemName: "xmark") |
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.foregroundColor(.white) |
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.font(.subheadline) |
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.padding(.leading, 20) |
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} |
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.zIndex(1) |
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VStack(alignment: .center) { |
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Spacer() |
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if let key = maybe_key { |
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Image(uiImage: generateQRCode(pubkey: "nostr:" + key)) |
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.interpolation(.none) |
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.resizable() |
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.scaledToFit() |
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.frame(width: 200, height: 200) |
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.padding() |
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Text(key) |
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.font(.headline) |
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.foregroundColor(Color(.white)) |
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.padding() |
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} |
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Spacer() |
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} |
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} |
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.modifier(SwipeToDismissModifier(minDistance: nil, onDismiss: { |
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presentationMode.wrappedValue.dismiss() |
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})) |
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} |
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func generateQRCode(pubkey: String) -> UIImage { |
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let data = pubkey.data(using: String.Encoding.ascii) |
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let qrFilter = CIFilter(name: "CIQRCodeGenerator") |
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qrFilter?.setValue(data, forKey: "inputMessage") |
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let qrImage = qrFilter?.outputImage |
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let colorInvertFilter = CIFilter(name: "CIColorInvert") |
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colorInvertFilter?.setValue(qrImage, forKey: "inputImage") |
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let outputInvertedImage = colorInvertFilter?.outputImage |
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let maskToAlphaFilter = CIFilter(name: "CIMaskToAlpha") |
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maskToAlphaFilter?.setValue(outputInvertedImage, forKey: "inputImage") |
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let outputCIImage = maskToAlphaFilter?.outputImage |
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let context = CIContext() |
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let cgImage = context.createCGImage(outputCIImage!, from: outputCIImage!.extent)! |
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return UIImage(cgImage: cgImage) |
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} |
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} |
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struct QRCodeView_Previews: PreviewProvider { |
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static var previews: some View { |
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QRCodeView(damus_state: test_damus_state()) |
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} |
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} |
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