Cannot find 'selectedIndexPaths' in scope - ios

Question

My Viewcontroller shows "Cannot find 'selectedIndexPaths' in scope" and other errors
My viewcontroller with errors:- import UIKit
class ProductViewController: UIViewController, UITableViewDataSource,
UITableViewDelegate {
let notificationButton = SSBadgeButton()
let rightbarbuttonimage = UIImage(named:"ic_cart")
fileprivate var cart = Cart()
let scrollView = UIScrollView()
let sections = ["Section A", "Section B","Section C", "Section D","Section E","Section F","Section G","Section H", "Section I","Section J","Section K","Section L"]
let rowspersection = [2,3,1,2,2,3,3,1,4,2,1,2]
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
self.tableView.backgroundColor = UIColor.gray
//Add and setup scroll view
self.tableView.addSubview(self.scrollView)
self.scrollView.translatesAutoresizingMaskIntoConstraints = false;
//Constrain scroll view
self.scrollView.leadingAnchor.constraint(equalTo: self.tableView.leadingAnchor, constant: 20).isActive = true;
self.scrollView.topAnchor.constraint(equalTo: self.tableView.topAnchor, constant: 20).isActive = true;
self.scrollView.trailingAnchor.constraint(equalTo: self.tableView.trailingAnchor, constant: -20).isActive = true;
self.scrollView.bottomAnchor.constraint(equalTo: self.tableView.bottomAnchor, constant: -20).isActive = true;
// customising rightBarButtonItems as notificationbutton
notificationButton.frame = CGRect(x: 0, y: 0, width: 44, height: 44)
notificationButton.setImage(UIImage(named: "ic_cart")?.withRenderingMode(.alwaysTemplate), for: .normal)
notificationButton.badgeEdgeInsets = UIEdgeInsets(top: 20, left: 0, bottom: 0, right: 15)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: notificationButton)
//following register is needed because I have rightbarbuttonitem customised as uibutton i.e. notificationbutton
notificationButton.addTarget(self, action: #selector(self.registerTapped(_:)), for: .touchUpInside)
}
#objc func registerTapped(_ sender: UIButton) {
self.performSegue(withIdentifier: "showCart", sender: nil)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
//Workaround to avoid the fadout the right bar button item
self.navigationItem.rightBarButtonItem?.isEnabled = false
self.navigationItem.rightBarButtonItem?.isEnabled = true
//Update cart if some items quantity is equal to 0 and reload the product table and right button bar item
cart.updateCart()
//self.navigationItem.rightBarButtonItem?.title = "Checkout (\(cart.items.count))"
notificationButton.badge = String(cart.items.count)// making badge equal to no.ofitems in cart
tableView.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// this segue to transfer data
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showCart" {
if let cartViewController = segue.destination as? CartViewController {
cartViewController.cart = self.cart
}
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return productMap.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return productMap[section]?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let product = productMap[indexPath.section]![indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "ProductTableViewCell") as! ProductTableViewCell
cell.imageView?.image = product.imagename
cell.delegate = self as CartDelegate
cell.setButton(state: self.cart.contains(product: product))
return cell
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 44
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
switch(section) {
case 0: return "Section A"
case 1: return "Section B"
case 2: return "Section C"
case 3: return "Section D"
case 4: return "Section E"
case 5: return "Section F"
case 6: return "Section G"
case 7: return "Section H"
case 8: return "Section I"
case 9: return "Section J"
case 10: return "Section K"
case 11: return "Section L"
default: return ""
}
}
}
extension ProductViewController: CartDelegate {
// MARK: - CartDelegate
func updateCart(cell: ProductTableViewCell) {
guard let indexPath = tableView.indexPath(for: cell) else { return }
let product = productMap[indexPath.section]![indexPath.row]
/// `var selectedIndexPaths = [IndexPath]()` defined inside `ProductViewController`, to keep track of the selected products// **error -Cannot find 'selectedIndexPaths' in scope**
if selectedIndexPaths.contains(indexPath) {**//error -Cannot find 'selectedIndexPaths' in scope**
if let index = selectedIndexPaths.firstIndex(of: indexPath) {
selectedIndexPaths.remove(at: index)**//error -Cannot find 'selectedIndexPaths' in scope**
removeProductFromCart(indexPath: indexPath)
}
} else {
selectedIndexPaths.append(indexPath)
addProductToCart(indexPath: indexPath)
}
// addProductToCart(indexPath: indexPath)
/// **I commented this out because I don't have the code for `Cart`**
//Update Cart with product
// cart.updateCart(with: product)
// self.navigationItem.rightBarButtonItem?.title = "Checkout (\(cart.items.count))"
// notificationButton.badge = String(cart.items.count) // making badge equal to noofitems in cart
}
}
func addProductToCart(indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) as? ProductTableViewCell {
if let imageView = cell.imagename {
let initialImageViewFrame = imageView.convert(imageView.frame, to: self.view)
let targetImageViewFrame = self.notificationButton.frame
let imgViewTemp = UIImageView(frame: initialImageViewFrame)
imgViewTemp.clipsToBounds = true
imgViewTemp.contentMode = .scaleAspectFill
imgViewTemp.image = imageView.image
self.view.addSubview(imgViewTemp)
UIView.animate(withDuration: 1.0, animations: {
imgViewTemp.transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
}) { _ in
UIView.animate(withDuration: 0.5, animations: {
imgViewTemp.transform = CGAffineTransform(scaleX: 0.2, y: 0.2).rotated(by: CGFloat(Double.pi))
imgViewTemp.frame = targetImageViewFrame
}) { _ in
imgViewTemp.removeFromSuperview()
UIView.animate(withDuration: 1.0, animations: {
self.notificationButton.transform = CGAffineTransform(scaleX: 1.4, y: 1.4)
}, completion: {_ in
self.notificationButton.transform = CGAffineTransform.identity
})
}
}
}
}
}
func removeProductFromCart(indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) as? ProductTableViewCell {
if let imageView = cell.imagename {
let initialImageViewFrame = self.notificationButton.frame
let targetImageViewFrame = imageView.convert(imageView.frame, to: self.view)
let imgViewTemp = UIImageView(frame: initialImageViewFrame)
imgViewTemp.clipsToBounds = true
imgViewTemp.contentMode = .scaleAspectFill
imgViewTemp.image = imageView.image
self.view.addSubview(imgViewTemp)
var initialTransform = CGAffineTransform.identity
initialTransform = initialTransform.scaledBy(x: 0.2, y: 0.2)
initialTransform = initialTransform.rotated(by: CGFloat(Double.pi))
UIView.animate(withDuration: 0.5, animations: {
self.notificationButton.animationZoom(scaleX: 1.4, y: 1.4)
imgViewTemp.transform = initialTransform
}) { _ in
UIView.animate(withDuration: 1, animations: {
self.notificationButton.animationZoom(scaleX: 1, y: 1)
imgViewTemp.transform = CGAffineTransform.identity
imgViewTemp.frame = targetImageViewFrame
}) { _ in
imgViewTemp.removeFromSuperview()
}
}
}
}
}
screenshot of the error-
I have tableview in my productviewcotroller as shown below. so, thats not an issusem still errors:-
There are other errors also which it is showing.
How to sort it out ?

Answer 1

var selectedIndexPaths = IndexPath
Please define selectedIndexPaths inside the main class not in the extension then check it again .