70 lines
2.3 KiB
Swift
70 lines
2.3 KiB
Swift
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// QRCodeViewModel.swift
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// TUIRoomKit
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//
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// Created by janejntang on 2023/1/11.
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// Copyright © 2023 Tencent. All rights reserved.
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//
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import Foundation
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import PhotosUI
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class QRCodeViewModel {
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let urlString: String
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var store: RoomStore {
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EngineManager.shared.store
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}
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init(urlString: String) {
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self.urlString = urlString
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}
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func copyAction(sender: UIButton, text: String) {
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UIPasteboard.general.string = text
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}
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func saveIntoAlbumAction(sender: UIButton, image: UIImage) {
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UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
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}
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func backAction() {
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RoomRouter.shared.dismissPopupViewController()
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}
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func createQRCodeImageView(url: String, imageView: UIImageView) {
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if url.count == 0 { return }
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guard let filter = CIFilter(name: "CIQRCodeGenerator") else {return}
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filter.setDefaults()
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// Set filter input data
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let data = url.data(using: String.Encoding.utf8)
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filter.setValue(data, forKey: "inputMessage")
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// Set the error correction rate of QR code
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filter.setValue("M", forKey: "inputCorrectionLevel")
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guard var image = filter.outputImage else { return }
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let transform = CGAffineTransform(scaleX: 20, y: 20)
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image = image.transformed(by: transform)
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let resultImage = UIImage(ciImage: image)
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guard let center = UIImage(named: "AppIcon.png") else { return }
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guard let resultImage = getClearImage(sourceImage: resultImage, center: center) else { return }
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imageView.image = resultImage
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}
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private func getClearImage(sourceImage: UIImage, center: UIImage) -> UIImage? {
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let size = sourceImage.size
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UIGraphicsBeginImageContext(size)
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sourceImage.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
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let width: CGFloat = 80
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let height: CGFloat = 80
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let x: CGFloat = (size.width - width) * 0.5
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let y: CGFloat = (size.height - height) * 0.5
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center.draw(in: CGRect(x: x, y: y, width: width, height: height))
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guard let resultImage = UIGraphicsGetImageFromCurrentImageContext() else { return nil }
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UIGraphicsEndImageContext()
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return resultImage
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}
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deinit {
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debugPrint("deinit \(self)")
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}
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}
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