136 lines
4.8 KiB
Swift
136 lines
4.8 KiB
Swift
/*
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* QRCodeReader.swift
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*
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* Copyright 2014-present Yannick Loriot.
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* http://yannickloriot.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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import AVFoundation
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import UIKit
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class ViewController: UIViewController, QRCodeReaderViewControllerDelegate {
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@IBOutlet weak var previewView: QRCodeReaderView!
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lazy var reader: QRCodeReader = QRCodeReader()
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lazy var readerVC: QRCodeReaderViewController = {
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let builder = QRCodeReaderViewControllerBuilder {
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$0.reader = QRCodeReader(metadataObjectTypes: [AVMetadataObject.ObjectType.qr], captureDevicePosition: .back)
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$0.showTorchButton = true
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}
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return QRCodeReaderViewController(builder: builder)
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}()
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// MARK: - Actions
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private func checkScanPermissions() -> Bool {
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do {
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return try QRCodeReader.supportsMetadataObjectTypes()
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} catch let error as NSError {
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let alert: UIAlertController?
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switch error.code {
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case -11852:
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alert = UIAlertController(title: "Error", message: "This app is not authorized to use Back Camera.", preferredStyle: .alert)
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alert?.addAction(UIAlertAction(title: "Setting", style: .default, handler: { (_) in
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DispatchQueue.main.async {
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if let settingsURL = URL(string: UIApplicationOpenSettingsURLString) {
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UIApplication.shared.openURL(settingsURL)
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}
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}
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}))
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alert?.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
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case -11814:
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alert = UIAlertController(title: "Error", message: "Reader not supported by the current device", preferredStyle: .alert)
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alert?.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
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default:
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alert = nil
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}
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guard let vc = alert else { return false }
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present(vc, animated: true, completion: nil)
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return false
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}
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}
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@IBAction func scanInModalAction(_ sender: AnyObject) {
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guard checkScanPermissions() else { return }
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readerVC.modalPresentationStyle = .formSheet
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readerVC.delegate = self
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readerVC.completionBlock = { (result: QRCodeReaderResult?) in
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if let result = result {
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print("Completion with result: \(result.value) of type \(result.metadataType)")
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}
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}
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present(readerVC, animated: true, completion: nil)
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}
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@IBAction func scanInPreviewAction(_ sender: Any) {
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guard checkScanPermissions(), !reader.isRunning else { return }
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previewView.setupComponents(showCancelButton: false, showSwitchCameraButton: false, showTorchButton: false, showOverlayView: true, reader: reader)
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reader.startScanning()
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reader.didFindCode = { result in
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let alert = UIAlertController(
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title: "QRCodeReader",
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message: String (format:"%@ (of type %@)", result.value, result.metadataType),
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preferredStyle: .alert
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)
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alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
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}
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}
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// MARK: - QRCodeReader Delegate Methods
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func reader(_ reader: QRCodeReaderViewController, didScanResult result: QRCodeReaderResult) {
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reader.stopScanning()
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dismiss(animated: true) { [weak self] in
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let alert = UIAlertController(
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title: "QRCodeReader",
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message: String (format:"%@ (of type %@)", result.value, result.metadataType),
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preferredStyle: .alert
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)
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alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
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self?.present(alert, animated: true, completion: nil)
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}
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}
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func reader(_ reader: QRCodeReaderViewController, didSwitchCamera newCaptureDevice: AVCaptureDeviceInput) {
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print("Switching capturing to: \(newCaptureDevice.device.localizedName)")
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}
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func readerDidCancel(_ reader: QRCodeReaderViewController) {
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reader.stopScanning()
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dismiss(animated: true, completion: nil)
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}
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}
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