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Expose AVDocumentScanner to be public (#34)
* Make stuff public * Make more stuff public * SwiftLint * Add custom UIViewController class Showing how to use the scanner directly * Add some documentation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| // | ||
| // CustomUIViewController.swift | ||
| // YesWeScanExampleApp | ||
| // | ||
| // Created by Xaver Lohmüller on 02.05.19. | ||
| // Copyright © 2019 adorsys GmbH & Co KG. All rights reserved. | ||
| // | ||
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| import YesWeScan | ||
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| final class CustomUIViewController: UIViewController { | ||
| private lazy var scanner: DocumentScanner = AVDocumentScanner(delegate: self) | ||
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| private var detectionLayer: CAShapeLayer = { | ||
| let layer = CAShapeLayer() | ||
| layer.fillColor = UIColor.red.withAlphaComponent(0.3).cgColor | ||
| layer.strokeColor = UIColor.red.withAlphaComponent(0.9).cgColor | ||
| layer.lineWidth = 2 | ||
| layer.contentsGravity = .resizeAspectFill | ||
| return layer | ||
| }() | ||
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| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
| scanner.previewLayer.frame = UIScreen.main.bounds | ||
| view.layer.addSublayer(scanner.previewLayer) | ||
| scanner.previewLayer.addSublayer(detectionLayer) | ||
| } | ||
| } | ||
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| extension CustomUIViewController: DocumentScannerDelegate { | ||
| func didCapture(image: UIImage) { | ||
| let imageView = UIImageView(image: image) | ||
| imageView.showAnimated(on: view) | ||
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| scanner.stop() | ||
| DispatchQueue.main.asyncAfter(deadline: .now() + 3) { | ||
| imageView.hideAnimated() | ||
| self.scanner.start() | ||
| } | ||
| } | ||
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| func didRecognize(feature: RectangleFeature?, in image: CIImage) { | ||
| detectionLayer.path = feature?.bezierPath.cgPath | ||
| } | ||
| } | ||
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| private extension UIView { | ||
| func showAnimated(on view: UIView, duration: TimeInterval = 0.5) { | ||
| frame = view.frame | ||
| alpha = 0 | ||
| view.addSubview(self) | ||
| UIView.animate(withDuration: duration) { | ||
| self.alpha = 1 | ||
| } | ||
| } | ||
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| func hideAnimated(duration: TimeInterval = 0.5) { | ||
| UIView.animate(withDuration: duration, | ||
| animations: { self.alpha = 0 }, | ||
| completion: { _ in self.removeFromSuperview() }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,19 @@ | ||
| import UIKit | ||
| import CoreImage | ||
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| protocol DocumentScannerDelegate: AnyObject { | ||
| // Always called on main queue | ||
| // Methods are always called on main queue | ||
| public protocol DocumentScannerDelegate: AnyObject { | ||
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| /// Called when the scanner successfully found an image | ||
| /// | ||
| /// - Parameter image: The image that was found | ||
| func didCapture(image: UIImage) | ||
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| /// Use this method to display a preview border of the image that is about | ||
| /// to be recognized | ||
| /// | ||
| /// - Parameters: | ||
| /// - feature: The extent of the image that is being recognized | ||
| /// - image: The image that contains the image to be recognized | ||
| func didRecognize(feature: RectangleFeature?, in image: CIImage) | ||
| } |
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