Meine erste App, deren Fehler und Optimierungen

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  • macmoonshine schrieb:

    Amin Negm-Awad schrieb:

    So wie der Kommunismus die Ungleichheit der Menschen.
    Oder der Kapitalismus allen die gleichen Chancen einräumt. :D
    So ist es eben auch mit Objective-C und Swift: Beides ist gleich, nur Objective-C eben besser.
    Es hat noch nie etwas gefunzt. To tear down the Wall would be a Werror!
    25.06.2016: [Swift] gehört zu meinen *Favorite Tags* auf SO. In welcher Bedeutung von "favorite"?

  • Ghost108 schrieb:

    was für ein Buch wäre denn zu empfehlen?

    @MCDan
    zumindest funktioniert der Code so, solang ich das inout weg lasse ...



    * UPDATE *

    Habe den Code mal wie folgt angepasst:

    C-Quellcode

    1. //
    2. // ViewController.swift
    3. // Test
    4. //
    5. // Copyright (c) 2015 by Ghost108. All rights reserved.
    6. //
    7. import UIKit
    8. import AVFoundation
    9. import Foundation
    10. import CoreData
    13. class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, AVCaptureMetadataOutputObjectsDelegate {
    16. @IBOutlet weak var LebensmittelTable: UITableView!
    17. @IBOutlet weak var NavBarLM: UINavigationItem!
    20. let session : AVCaptureSession = AVCaptureSession()
    21. let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
    22. let device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
    24. var previewLayer : AVCaptureVideoPreviewLayer!
    25. var highlightView : UIView = UIView()
    26. var detectionString : String! = ""
    37. /*************** VIEW DID LOAD ***************/
    38. override func viewDidLoad() {
    39. super.viewDidLoad()
    41. // Button Scan einblenden
    42. var imageViewright:UIImageView = UIImageView()
    43. imageViewright.frame = CGRectMake(0, 0, 26, 26)
    44. var rightImage:UIImage = UIImage(named: "barcode")!
    45. imageViewright.image = rightImage
    46. var rightView:UIView = UIView()
    47. rightView.frame = CGRectMake(0, 0, 26, 26)
    48. rightView.addSubview(imageViewright)
    49. var rightGestureRecognizer:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "StartScan")
    50. rightView.addGestureRecognizer(rightGestureRecognizer)
    51. var righttem:UIBarButtonItem = UIBarButtonItem()
    52. righttem.customView = rightView
    53. self.navigationItem.rightBarButtonItem = righttem
    54. righttem.tintColor = UIColor.whiteColor()
    55. }
    71. /*************** SCAN ***************/
    72. func StartScan() {
    76. self.highlightView.autoresizingMask = .FlexibleTopMargin | .FlexibleBottomMargin | .FlexibleLeftMargin | .FlexibleRightMargin
    77. self.highlightView.layer.borderColor = UIColor.greenColor().CGColor
    78. self.highlightView.layer.borderWidth = 3
    79. self.view.addSubview(self.highlightView)
    82. var error : NSError? = nil
    83. let input : AVCaptureDeviceInput? = AVCaptureDeviceInput.deviceInputWithDevice(device, error: &error) as? AVCaptureDeviceInput
    86. if input != nil {
    87. session.addInput(input)
    88. }
    90. let output = AVCaptureMetadataOutput()
    91. output.setMetadataObjectsDelegate(self, queue: dispatch_get_main_queue())
    92. session.addOutput(output)
    93. output.metadataObjectTypes = output.availableMetadataObjectTypes
    96. previewLayer = AVCaptureVideoPreviewLayer.layerWithSession(session) as! AVCaptureVideoPreviewLayer
    97. previewLayer.frame = self.view.bounds
    98. previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
    99. self.view.layer.addSublayer(previewLayer)
    101. session.startRunning()
    102. }
    105. /*************** BARCODE GEFUNDEN ***************/
    106. func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {
    108. func getEAN (inout detectionString: String) {
    111. var highlightViewRect = CGRectZero
    112. var barCodeObject : AVMetadataObject!
    114. let barCodeTypes = [
    115. AVMetadataObjectTypeUPCECode,
    116. AVMetadataObjectTypeCode39Code,
    117. AVMetadataObjectTypeCode39Mod43Code,
    118. AVMetadataObjectTypeEAN13Code,
    119. AVMetadataObjectTypeEAN8Code,
    120. AVMetadataObjectTypeCode93Code,
    121. AVMetadataObjectTypeCode128Code,
    122. AVMetadataObjectTypePDF417Code,
    123. AVMetadataObjectTypeQRCode,
    124. AVMetadataObjectTypeAztecCode,
    125. AVMetadataObjectTypeITF14Code,
    126. AVMetadataObjectTypeInterleaved2of5Code,
    127. AVMetadataObjectTypeFace,
    128. AVMetadataObjectTypeDataMatrixCode
    129. ]
    132. for metadata in metadataObjects {
    133. for barcodeType in barCodeTypes {
    134. if metadata.type == barcodeType {
    135. barCodeObject = self.previewLayer.transformedMetadataObjectForMetadataObject(metadata as! AVMetadataMachineReadableCodeObject)
    136. highlightViewRect = barCodeObject.bounds
    137. detectionString = (metadata as! AVMetadataMachineReadableCodeObject).stringValue
    141. self.session.stopRunning()
    142. self.previewLayer.removeFromSuperlayer()
    147. println ("Scan: \(detectionString)")
    148. break
    149. }
    150. }
    151. }
    152. }
    153. getEAN(&detectionString!)
    154. }
    157. /*************** BUTTON SCAN SAVE ***************/
    158. @IBAction func ScanFertigstellen(sender: AnyObject) {
    160. func getCode(inout detectionString: String) {
    161. var eancode = detectionString
    162. println("Code: \(eancode)")
    163. }
    164. getCode(&detectionString!)
    165. }
    174. }
    Alles anzeigen
    Resultat:

    Zeile 147 gibt mir den gescannten Code aus.
    Zeile 162: gibt nur Code: aus ohne EAN Code
    Zeile 106 fehlt der Aufruf 'inout DetectionString: String' als Parameter der Funktion. Im Playground hast du es ja so auch gemacht ;)
    „Wer immer tut, was er schon kann, bleibt immer das, was er schon ist.“
    Henry Ford

  • C-Quellcode

    1. //
    2. // ViewController.swift
    3. // Test
    4. //
    5. // Copyright (c) 2015 by Ghost108. All rights reserved.
    6. //
    7. import UIKit
    8. import AVFoundation
    9. import Foundation
    13. class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, AVCaptureMetadataOutputObjectsDelegate {
    16. @IBOutlet weak var LebensmittelTable: UITableView!
    17. @IBOutlet weak var NavBarLM: UINavigationItem!
    20. let session : AVCaptureSession = AVCaptureSession()
    21. let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
    22. let device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
    24. var previewLayer : AVCaptureVideoPreviewLayer!
    25. var highlightView : UIView = UIView()
    26. var lebensmittel = [LM_ITEMS]()
    27. var detectionString : String! = ""
    39. /*************** VIEW DID LOAD ***************/
    40. override func viewDidLoad() {
    41. super.viewDidLoad()
    43. self.DatenAbrufen()
    45. // Button Scan einblenden
    46. var imageViewright:UIImageView = UIImageView()
    47. imageViewright.frame = CGRectMake(0, 0, 26, 26)
    48. var rightImage:UIImage = UIImage(named: "barcode")!
    49. imageViewright.image = rightImage
    50. var rightView:UIView = UIView()
    51. rightView.frame = CGRectMake(0, 0, 26, 26)
    52. rightView.addSubview(imageViewright)
    53. var rightGestureRecognizer:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "StartScan")
    54. rightView.addGestureRecognizer(rightGestureRecognizer)
    55. var righttem:UIBarButtonItem = UIBarButtonItem()
    56. righttem.customView = rightView
    57. self.navigationItem.rightBarButtonItem = righttem
    58. righttem.tintColor = UIColor.whiteColor()
    59. }
    80. /*************** SCAN ***************/
    81. func StartScan() {
    83. // Button Scan ausblenden
    84. self.navigationItem.rightBarButtonItem = nil
    86. // Button Scan abbrechen einblenden
    87. self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .Stop, target: self, action: "ScanAbbrechen")
    88. self.navigationItem.leftBarButtonItem!.tintColor = UIColor.whiteColor()
    91. self.highlightView.autoresizingMask = .FlexibleTopMargin | .FlexibleBottomMargin | .FlexibleLeftMargin | .FlexibleRightMargin
    92. self.highlightView.layer.borderColor = UIColor.greenColor().CGColor
    93. self.highlightView.layer.borderWidth = 3
    94. self.view.addSubview(self.highlightView)
    97. var error : NSError? = nil
    98. let input : AVCaptureDeviceInput? = AVCaptureDeviceInput.deviceInputWithDevice(device, error: &error) as? AVCaptureDeviceInput
    100. // Button ToogleLight einblenden falls vorhanden
    101. if (device.hasTorch) {
    102. var imageViewright:UIImageView = UIImageView()
    103. imageViewright.frame = CGRectMake(0, 0, 26, 26)
    104. var rightImage:UIImage = UIImage(named: "light")!
    105. imageViewright.image = rightImage
    106. var rightView:UIView = UIView()
    107. rightView.frame = CGRectMake(0, 0, 26, 26)
    108. rightView.addSubview(imageViewright)
    109. var rightGestureRecognizer:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "ToogleLight")
    110. rightView.addGestureRecognizer(rightGestureRecognizer)
    111. var rightItem:UIBarButtonItem = UIBarButtonItem()
    112. rightItem.customView = rightView
    113. self.navigationItem.rightBarButtonItem = rightItem
    114. rightItem.tintColor = UIColor.whiteColor()
    115. }
    118. if input != nil {
    119. session.addInput(input)
    120. }
    122. let output = AVCaptureMetadataOutput()
    123. output.setMetadataObjectsDelegate(self, queue: dispatch_get_main_queue())
    124. session.addOutput(output)
    125. output.metadataObjectTypes = output.availableMetadataObjectTypes
    128. previewLayer = AVCaptureVideoPreviewLayer.layerWithSession(session) as! AVCaptureVideoPreviewLayer
    129. previewLayer.frame = self.view.bounds
    130. previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
    131. self.view.layer.addSublayer(previewLayer)
    133. session.startRunning()
    134. }
    137. /*************** BARCODE GEFUNDEN ***************/
    138. func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {
    140. var highlightViewRect = CGRectZero
    141. var barCodeObject : AVMetadataObject!
    143. let barCodeTypes = [
    144. AVMetadataObjectTypeUPCECode,
    145. AVMetadataObjectTypeCode39Code,
    146. AVMetadataObjectTypeCode39Mod43Code,
    147. AVMetadataObjectTypeEAN13Code,
    148. AVMetadataObjectTypeEAN8Code,
    149. AVMetadataObjectTypeCode93Code,
    150. AVMetadataObjectTypeCode128Code,
    151. AVMetadataObjectTypePDF417Code,
    152. AVMetadataObjectTypeQRCode,
    153. AVMetadataObjectTypeAztecCode,
    154. AVMetadataObjectTypeITF14Code,
    155. AVMetadataObjectTypeInterleaved2of5Code,
    156. AVMetadataObjectTypeFace,
    157. AVMetadataObjectTypeDataMatrixCode
    158. ]
    161. for metadata in metadataObjects {
    162. for barcodeType in barCodeTypes {
    163. if metadata.type == barcodeType {
    164. barCodeObject = self.previewLayer.transformedMetadataObjectForMetadataObject(metadata as! AVMetadataMachineReadableCodeObject)
    165. highlightViewRect = barCodeObject.bounds
    166. detectionString = (metadata as! AVMetadataMachineReadableCodeObject).stringValue
    170. self.session.stopRunning()
    171. self.previewLayer.removeFromSuperlayer()
    175. performSegueWithIdentifier("goToNextViewer", sender: nil)
    176. println ("Scan: \(detectionString)")
    177. break
    178. }
    179. }
    180. }
    181. }
    184. /*************** BUTTON SCAN SAVE ***************/
    185. @IBAction func ScanFertigstellen(sender: AnyObject) {
    186. println ("ScanFertigstellen: \(detectionString)")
    187. }
    199. }
    Alles anzeigen

    Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von Ghost108 ()

  • beide ViewController greifen auf die selbe Datei zu: ViewController.swift
    Außerdem führe ich damit den Code aus.
    Ansonsten würde dort der Println ScanFertigstellen: nicht erscheinen.
    Leider ohne EAN Code