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January 9, 2017 12:06
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| // | |
| // SecondViewController.swift | |
| // Scanmaster | |
| // | |
| // Created by Matthias Schmidt on 05/01/2017. | |
| // Copyright © 2017 Pixelflush. All rights reserved. | |
| // | |
| import UIKit | |
| import AVFoundation | |
| class SecondViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate { | |
| var session: AVCaptureSession! | |
| var previewLayer: AVCaptureVideoPreviewLayer! | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| print("test 1") | |
| // Create a session object. | |
| session = AVCaptureSession() | |
| // Set the captureDevice. | |
| let videoCaptureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo) | |
| // Create input object. | |
| let videoInput: AVCaptureDeviceInput? | |
| do { | |
| videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice) | |
| } catch { | |
| print("return") | |
| return | |
| } | |
| // Add input to the session. | |
| if (session.canAddInput(videoInput)) { | |
| session.addInput(videoInput) | |
| } else { | |
| scanningNotPossible() | |
| } | |
| let metadataOutput = AVCaptureMetadataOutput() | |
| // Add output to the session. | |
| if (session.canAddOutput(metadataOutput)) { | |
| session.addOutput(metadataOutput) | |
| // Send captured data to the delegate object via a serial queue. | |
| metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main) | |
| // Set barcode type for which to scan: Code128. | |
| metadataOutput.metadataObjectTypes = [AVMetadataObjectTypeCode128Code] | |
| // Add previewLayer and have it show the video data. | |
| previewLayer = AVCaptureVideoPreviewLayer(session: session); | |
| previewLayer.frame = view.layer.bounds; | |
| previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; | |
| view.layer.addSublayer(previewLayer); | |
| // Begin the capture session. | |
| session.startRunning() | |
| } else { | |
| scanningNotPossible() | |
| } | |
| } | |
| override func didReceiveMemoryWarning() { | |
| super.didReceiveMemoryWarning() | |
| // Dispose of any resources that can be recreated. | |
| } | |
| func scanningNotPossible() { | |
| print("scanningNotPossible()") | |
| // Let the user know that scanning isn't possible with the current device. | |
| let alert = UIAlertController(title: "Can't Scan.", message: "Let's try a device equipped with a camera.", preferredStyle: .alert) | |
| alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil)) | |
| present(alert, animated: true, completion: nil) | |
| session = nil | |
| } | |
| func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) { | |
| // Get the first object from the metadataObjects array. | |
| if let barcodeData = metadataObjects.first { | |
| // Turn it into machine readable code | |
| let barcodeReadable = barcodeData as? AVMetadataMachineReadableCodeObject; | |
| if let readableCode = barcodeReadable { | |
| // Send the barcode as a string to barcodeDetected() | |
| // barcodeDetected(readableCode.stringValue); | |
| print(readableCode.stringValue) | |
| } | |
| // Vibrate the device to give the user some feedback. | |
| AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate)) | |
| // Avoid a very buzzy device. | |
| session.stopRunning() | |
| } | |
| } | |
| } |
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