I am trying to learn Xcode using iOS 14 Programming for Beginners. I some how made an error when working through the instructions in the book. There are 2 navigation controllers and I connected a view controller to the wrong Navigation controller. When I realised my mistake I deleted the segue between the wrong Navigation Controller and the view controller. I then Ctrl + Dragged from the correct Nav Controller to the view controller and then created a new View Controller and did the same to this controller to the other Nav controller. If I build the app every thing seems to work, except the Nav controller does not load the Map view when I click on the map icon, even though I have added the Map View to the View Controller. Please help?

I am trying to learn Xcode using iOS 14 Programming for Beginners. I have just entered the code to add the images and titles on the explore screen and have checked the code with the code written by the author and it is correct. When the Explore screen opens in the simulator it should show the images with titles on the screen. All that I get is the header at the top! I have checked the connection for the IBOutlets and the have the dot in the circle, so they are connected. The code builds OK, so I am not sure what is wrong? How can I find what is causing this problem? I have not mastered debugging yet, would this help? Here is the ExploreCell.swift //  ExploreCellCollectionViewCell.swift //  EatOut // //  Created by Tony Hudson on 02/06/2021. // import UIKit class ExploreCell: UICollectionViewCell {     @IBOutlet weak var lblName: UILabel!     @IBOutlet weak var imgExplore: UIImageView! } Here is ExploreItem.swift //  ExploreItem.swift //  EatOut // //  Created by Tony Hudson on 02/06/2021. // import Foundation struct  ExploreItem {     var name: String     var image: String }     extension ExploreItem {         init(dict: [String:AnyObject]) {             self.name = dict["name"] as! String             self.image = dict["image"] as! String         }     } Here is ExploreDataManager.swift //  ExploreDataManager.swift //  EatOut // //  Created by Tony Hudson on 02/06/2021. // import Foundation class ExploreDataManager {     fileprivate var items: [ExploreItem] = []     func fetch() {         for data in loadData() {             items.append(ExploreItem(dict: data))         }     }     fileprivate func loadData() -> [[String: AnyObject]] {         guard let path = Bundle.main.path(forResource: "ExploreData", ofType: "plist"), let items = NSArray(contentsOfFile: path) else {             return [[:]]         }         return items as! [[String: AnyObject]]     }     func numberOfItems() -> Int {         items.count     }     func explore(at index:IndexPath) -> ExploreItem {         items[index.item]     } } I think that is as much information that I can give! Can someone point me in the right direction so that I can solve this problem?

I am trying to learn Xcode using iOS 14 Programming for Beginners (Packt Pub). I am now working on the part that adds the pins to the MapView, but when I run the app the map button is unresponsive (Runtime error). I get the following message in the Debug area: __2021-07-25 16:08:23.919240+0100 EatOut[1420:21167] Metal API Validation Enabled Could not cast value of type 'Swift.Array<EatOut.RestaurantItem>' (0x1c31e3588) to '__C.MKAnnotation' (0x1c31e3888). 2021-07-25 16:08:24.003987+0100 EatOut[1420:21167] Could not cast value of type 'Swift.Array<EatOut.RestaurantItem>' (0x1c31e3588) to '__C.MKAnnotation' (0x1c31e3888). Could not cast value of type 'Swift.Array<EatOut.RestaurantItem>' (0x1c31e3588) to 'C.MKAnnotation' (0x1c31e3888). CoreSimulator 757.5 - Device: iPhone SE (2nd generation) (E06FF756-9D0E-45B8-BBF5-7B393524B880) - Runtime: iOS 14.5 (18E182) - DeviceType: iPhone SE (2nd generation) I'm sure that this message means a lot to you experts, but as a beginner I haven't a clue! The runtime error is in this func, in the final line:  func addMap(_ annontations: [RestaurantItem]) {             mapView.setRegion(manager.currentRegion(latDelta: 0.5, longDelta: 0.5), animated: true)             mapView.addAnnotation(manager.annotations as! MKAnnotation) I get a build error on the final line if I do not apply the fix, which adds the as! MKAnnotation. Is the error in the .plist or does the code need altering? Please can you help? Here is the full code for the swift file: //  MapViewController.swift //  EatOut // //  Created by Tony Hudson on 15/07/2021. // import UIKit import MapKit class MapViewController: UIViewController, MKMapViewDelegate {     let manager = MapDataManager()     var selectedRestaurant: RestaurantItem?     @IBOutlet weak var mapView: MKMapView!     override func viewDidLoad() {         initialise()         func initialise() {             manager.fetch { (annotations) in addMap(annotations)             }         }         func addMap(_ annontations: [RestaurantItem]) {             mapView.setRegion(manager.currentRegion(latDelta: 0.5, longDelta: 0.5), animated: true)             mapView.addAnnotation(manager.annotations as! MKAnnotation)         }     } }

I am trying to learn Xcode using iOS 14 Programming for Beginners (Packt Pub). I have had several problems with the code so I have been ultra careful and I can't find any mistakes. There is also another error in the code in an extension in the code. Here is a copy of the code: / //  MapViewController.swift //  EatOut // //  Created by Tony Hudson on 15/07/2021. // Links to: Item -308,318,319,320,321,324,341,352,353 import UIKit import MapKit class MapViewController: UIViewController,MKMapViewDelegate {     @IBOutlet weak var mapView: MKMapView!     let manager = MapDataManager()     var selectedRestaurant: RestaurantItem?     override func viewDidLoad() {         super.viewDidLoad()         initialize()     }     override func prepare(for segue: UIStoryboardSegue, sender: Any?){         switch segue.indentifier! { //<<Value of type 'UIStoryboardSegue' has no member 'indentifier'         case Segue.showDetail.rawValue: showRestaurantDetail(segue: segue)         default:             print("Segue not added")         }     } } // MARK: Private Extension private extension MapViewController {     func initialize() {         mapView.delegate = self         manager.fetch {(annotations) in addMap(annotations)}     }     func addMap(_ annotations: [RestaurantItem]) {         mapView.setRegion(manager.currentRegion(latDelta: 0.5, longDelta: 0.5), animated: true)         mapView.addAnnotations(manager.annotations)     }     func showRestaurantDetail (segue: UIStoryboardSegue){         if let viewController = segue.destination as? RestaurantDetailViewController, let restaurant = selectedRestaurant {             viewController.selectedRestaurant = restaurant         }     } } // MARK: MKMapViewDelegate extension MapViewController: MKMapViewDelegate { //<< Redundant conformance of 'MapViewController' to protocol 'MKMapViewDelegate'     func mapView(_ mapView: MKMapView, annotationView view:MKAnnotationView, calloutAccessoryControlTapped control: UIControl)  {         guard let annotation = mapView.selectedAnnotations.first         else{             return         }         selectedRestaurant = annotation as? RestaurantItem         self.performSegue(withIdentifier: Segue.showDetail.rawValue, sender: self)     }     func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation ) -> MKAnnotationView? {         let identifier = "custompin"         guard !annotation.isKind(of: MKUserLocation.self) else {             return nil         }         var annotationView: MKAnnotationView?         if let customAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier) {             annotationView = customAnnotationView             annotationView?.annotation = annotation         } else {             let av = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)             av.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)             annotationView = av         }         if let annotationView = annotationView {             annotationView.canShowCallout = true             annotationView.image = UIImage(named: "custom-annotation")         }         return annotationView     } } I am wondering if there is some action that I have not done previously that is causing these errors. Can anyone help?

I am trying to learn Xcode using a book called 'iOS 14 Programming for Beginners'. Although the book is supposed to show the correct code I have found that it still raises errors when I type in the code. They also have the code online, which I have downloaded and compared to my code, yet I still get errors. Here is the file that produces the errors: // //  ExploreViewController.swift //  EatOut // //  Created by Tony Hudson on 15/07/2021 // import UIKit class ExploreViewController: UIViewController, UICollectionViewDelegate {     @IBOutlet weak var collectionView: UICollectionView!     let manager = ExploreDataManager()     var selectedCity: LocationItem?     var headerView: ExploreHeaderView!     override func viewDidLoad() {         super.viewDidLoad()         initialize()     }     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {         switch segue.identifier {         case Segue.locationList.rawValue: showLocationList(segue: segue)         case Segue.restaurantList.rawValue:   //ERROR HERE showRestaurantListing(segue: segue)         default:             print("Segue not added")         }     }     override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {         if identifier == Segue.restaurantList.rawValue { //AND HERE             guard selectedCity!= nil else { showAlert()               return false             }             return true       }         return true     } } // MARK: Private Extension private extension ExploreViewController {     func initialize() {         manager.fetch()     }     func showLocationList(segue: UIStoryboardSegue) {         guard let navController = segue.destination as? UINavigationController, let viewController = navController.topViewController as? LocationViewController else {             return         }         guard let city = selectedCity else {           return         }         viewController.selectedCity = city     }     func showRestaurantListing(segue: UIStoryboardSegue) {         if let viewController = segue.destination as? RestaurantListViewController, let city = selectedCity, let index = CollectionView.indexPathsForSelectedItems?.first { viewController.selectedType = manager.explore(at: index).name viewController.selectedCity = city         }     }     func showAlert() {         let alertController = UIAlertController(title: "Location Needed", message: "Please select a location.", preferredStyle: .alert)         let okAction = UIAlertAction(title: "OK", style: .default, handler: nil) alertController.addAction(okAction)         present(alertController, animated: true, completion: nil)     }          @IBAction func unwindLocationCancel(segue: UIStoryboardSegue){     }     @IBAction func unwindLocationDone(segue:UIStoryboardSegue) {         if let viewController = segue.source as? LocationViewController {             selectedCity = viewController.selectedCity             if let location = selectedCity { headerView.lblLocation.text = location.full             }         }     } } // MARK: UICollectionViewDataSource extension ExploreViewController: UICollectionViewDataSource {     func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {         let header = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "header", for: indexPath)         headerView = header as? ExploreHeaderView         return headerView     }     func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {         manager.numberOfItems()     }     func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {         let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "exploreCell", for: indexPath) as! ExploreCell         let item = manager.explore(at: indexPath)         cell.lblName.text = item.name         cell.imgExplore.image = UIImage(named: item.image)         return cell     } // Can anyone see why this is producing this error?```