QRGeneratorView.swift (2861B)
1 /* MIT License 2 * Copyright (c) 2020 Jeeva Tamilselvan 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in all 12 * copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 import SwiftUI 23 24 struct QRGeneratorView: View { 25 let text: String 26 let size: CGFloat 27 @Binding var image: UIImage? 28 29 var body: some View { 30 VStack { 31 if let image { 32 Image(uiImage: image) 33 .interpolation(.none) 34 .resizable() 35 .scaledToFit() 36 .frame(width: size, height: size) 37 } else { 38 EmptyView() 39 } 40 }.onAppear { 41 // if let uiImage = getQRCode(text: text) { 42 if let data = getQRCodeData(text: text) { 43 if let uiImage = UIImage(data: data) { 44 image = uiImage 45 } 46 } 47 } 48 } 49 50 // func getQRCode(text: String) -> UIImage? { 51 func getQRCodeData(text: String) -> Data? { 52 guard let filter = CIFilter(name: "CIQRCodeGenerator") else { return nil } 53 let data = text.data(using: .ascii, allowLossyConversion: false) 54 filter.setValue(data, forKey: "inputMessage") 55 guard let ciimage = filter.outputImage else { return nil } 56 let transform = CGAffineTransform(scaleX: 10, y: 10) 57 let scaledCIImage = ciimage.transformed(by: transform) 58 let uiimage = UIImage(ciImage: scaledCIImage) 59 return uiimage.pngData()! 60 } 61 } 62 63 //#Preview { // 'Previewable()' is only available in iOS 17.0 or newer 64 // @Previewable @State var image: UIImage? 65 // VStack { 66 // QRGeneratorView(text: "Hello World!", size: 200, image: $image) 67 // QRGeneratorView(text: "taler://pay-pull/exchange.demo.taler.net/7J7SNHYMCCAZ1ARY9YCB5Z9FTY0YZP8F2KDRXV94KZCQ6WAVMTX0", 68 // size: 200, image: $image) 69 // } 70 //}