Could not access custom view from UIViewController using Swift - ios

Question

I am working credit card scanner using custom view. I have tried below code and could not able to access custom class. Could you please anyone help me to fix this issue. Attached error screenshot below. Thanks...
let BUTTON_SIZE = CGSize(width: 100, height: 20)
let BUTTON_BUFFER = 10
protocol GymCreditCardScannerViewDelegate: class {
func creditCardScannerDidCancel(_ scanner: Any?)
func creditCardScanner(_ scanner: Any?, scannedNumber number: String?)
}
import UIKit
class GymCreditCardScanner: UIView, CardIOViewDelegate {
weak var scannerdelegate: GymCreditCardScannerViewDelegate?
var cardIOView: CardIOView?
var cancelButton: UIButton?
var doneButton: UIButton?
var number = ""
var screenFrame = CGRect.zero
var innerFrame = CGRect.zero
func initIntoView(_ superView: UIView?, withDelegate delegate: Any?) -> Any? {
let frame = CGRect(x: 0, y: 0, width: superView?.frame.size.width ?? 0.0, height: superView?.frame.size.height ?? 0.0)
self.scannerdelegate = delegate as? GymCreditCardScannerViewDelegate
screenFrame = frame
let MARGIN: CGFloat = 0.05
innerFrame = CGRect(x: frame.size.width * MARGIN, y: frame.size.height * MARGIN, width: frame.size.width * (1 - 2 * MARGIN), height: frame.size.height * (1 - 2 * MARGIN))
cardIOView = CardIOView(frame: innerFrame)
cardIOView?.delegate = self as CardIOViewDelegate
cardIOView?.hideCardIOLogo = true
cardIOView?.scannedImageDuration = 0.1
addSubview(cardIOView!)
let buttonSize: CGSize = BUTTON_SIZE
cancelButton = UIButton(frame: CGRect(x: frame.size.width / 2 - buttonSize.width / 2, y: innerFrame.origin.y + innerFrame.size.height - buttonSize.height - CGFloat(BUTTON_BUFFER), width: buttonSize.width, height: buttonSize.height))
cancelButton?.setTitle("Cancel", for: .normal)
cancelButton?.addTarget(self, action: Selector(("handleCancelPress:")), for: .touchUpInside)
addSubview(cancelButton!)
superView?.addSubview(self)
return self
}
func remove() {
if (cardIOView != nil) {
cardIOView?.removeFromSuperview()
}
cardIOView = nil
removeFromSuperview()
}
func cardIOView(_ cardIOView: CardIOView!, didScanCard cardInfo: CardIOCreditCardInfo!) {
number = cardInfo.cardNumber
UIGraphicsBeginImageContextWithOptions(cardIOView.frame.size, true, 1)
if let aContext = UIGraphicsGetCurrentContext() {
cardIOView.layer.render(in: aContext)
}
let capture: UIImage? = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
let captureView = UIImageView(image: capture)
captureView.frame = cardIOView.frame
addSubview(captureView)
bringSubview(toFront: cancelButton!)
cardIOView.removeFromSuperview()
let frame: CGRect = screenFrame
let buttonSize: CGSize = BUTTON_SIZE
doneButton = UIButton(frame: CGRect(x: frame.size.width / 2 - buttonSize.width / 2, y: innerFrame.origin.y + innerFrame.size.height - buttonSize.height - CGFloat(BUTTON_BUFFER), width: buttonSize.width, height: buttonSize.height))
doneButton?.setTitle("Done", for: .normal)
doneButton?.addTarget(self, action: Selector(("handleDonePress:")), for: .touchUpInside)
addSubview(doneButton!)
doneButton?.alpha = 0
UIView.animate(withDuration: 0.075, delay: 0, options: .curveEaseOut, animations: {
self.doneButton?.alpha = 1
self.doneButton?.frame = CGRect(x: frame.size.width / 2 - buttonSize.width / 2 + (buttonSize.width + CGFloat(BUTTON_BUFFER)) / 2, y: self.innerFrame.origin.y + self.innerFrame.size.height - buttonSize.height - CGFloat(BUTTON_BUFFER), width: buttonSize.width, height: buttonSize.height)
self.cancelButton?.frame = CGRect(x: frame.size.width / 2 - buttonSize.width / 2 - (buttonSize.width + CGFloat(BUTTON_BUFFER)) / 2, y: self.innerFrame.origin.y + self.innerFrame.size.height - buttonSize.height - CGFloat(BUTTON_BUFFER), width: buttonSize.width, height: buttonSize.height)
}, completion: nil)
}
func handleCancelPress(_ sender: Any?) {
scannerdelegate?.creditCardScannerDidCancel(self)
}
func handleDonePress(_ sender: Any?) {
scannerdelegate?.creditCardScanner(self, scannedNumber: number)
}
}
My ViewContoller
class PaymentDetailsVC: UIViewController {
var scanner: GymCreditCardScanner?
//MARK: Credit card scanning
#IBAction func scanCreditCard(_ sender: Any) {
cardField.resignFirstResponder()
scanner = GymCreditCardScanner.initIntoView(view, withDelegate: self)
}
func creditCardScannerDidCancel(_ scanner: Any?) {
scanner.remove()
}
func creditCardScanner(_ scanner: Any?, scannedNumber number: String?) {
scanner.remove()
scanner = nil
numberField.text = number
}
}

Answer 1

Just replace var scanner: GymCreditCardScanner? // scanner is nil value you have to initial it
with
lazy var scanner: GymCreditCardScanner = GymCreditCardScanner()

Answer 2

You've written the function func initInto(_ superView: UIView?, withDelegate delegate: Any?) -> Any? { but instead you're trying to call the initIntoView.
function returns the Any? instead of GymCreditCardScanner. You can cast it like that:
scanner = GymCreditCardScanner.initInto(view, withDelegate: self) as? GymCreditCardScanner or simply change the function and return the GymCreditCardScanner? instead of Any?
func initInto should be static func initInto if you'd like to call it in this way or write your own constructor for this view
The scanner property is an optional (?), so you should call the remove() function like this:
scanner?.remove()

Answer 3

Your method declaration should be like this
static func initInto(_ superView: UIView?, withDelegate delegate: Any?) -> GymCreditCardScanner? {
//.......
let frame = CGRect(x: 0, y: 0, width: superView?.frame.size.width ?? 0.0, height: superView?.frame.size.height ?? 0.0)
let resultCreditCardScanner = GymCreditCardScanner(frame:frame)
resultCreditCardScanner.scannerdelegate = delegate as? GymCreditCardScannerViewDelegate
let MARGIN: CGFloat = 0.05
let innerFrame = CGRect(x: frame.size.width * MARGIN, y: frame.size.height * MARGIN, width: frame.size.width * (1 - 2 * MARGIN), height: frame.size.height * (1 - 2 * MARGIN))
resultCreditCardScanner.cardIOView = CardIOView(frame: innerFrame)
resultCreditCardScanner.cardIOView?.delegate = self as CardIOViewDelegate
resultCreditCardScanner.cardIOView?.hideCardIOLogo = true
resultCreditCardScanner.cardIOView?.scannedImageDuration = 0.1
resultCreditCardScanner.addSubview(cardIOView!)
let buttonSize: CGSize = BUTTON_SIZE
resultCreditCardScanner.cancelButton = UIButton(frame: CGRect(x: frame.size.width / 2 - buttonSize.width / 2, y: innerFrame.origin.y + innerFrame.size.height - buttonSize.height - CGFloat(BUTTON_BUFFER), width: buttonSize.width, height: buttonSize.height))
resultCreditCardScanner.cancelButton?.setTitle("Cancel", for: .normal)
resultCreditCardScanner.cancelButton?.addTarget(self, action: Selector(("handleCancelPress:")), for: .touchUpInside)
resultCreditCardScanner.addSubview(cancelButton!)
superView?.addSubview(resultCreditCardScanner)
return resultCreditCardScanner
}
then you will be able to do
scanner = GymCreditCardScanner.initInto(view, withDelegate: self)