TableViewController cell not populating data - ios

Question

I can't figure out why the table view controller is not populating with placeMarks.name and coordinates. The user taps a pin on the map and adds the location to the model. Where then it sent to the table view controller, however, it is not displaying the data from the model. Below is my code.
import Foundation
import CoreLocation
class PlaceList : NSObject {
let locations: Places
var coordinate: CLLocationCoordinate2D { return locations.coordinate }
init(point: Places) {
self.locations = point
super.init()
}
var title: String? {
return locations.name
}
var subtitle: String? {
return "(\(locations.coordinate.latitude), \(locations.coordinate.longitude))"
}
}
import CoreLocation
import Foundation
class Places: NSObject {
var name: String
var coordinate: CLLocationCoordinate2D
init(name: String, coordinate: CLLocationCoordinate2D) {
self.name = name
self.coordinate = coordinate
}
}
import UIKit
import MapKit
import CoreLocation
class MapViewController: UIViewController, MKMapViewDelegate,CLLocationManagerDelegate {
var placeModel: PlaceList?
var pointOfInterest: [Places] = []
var poi: [Places] = [] {
didSet {
pointOfInterest = poi
}
}
//Creating mapview object
var mapView: MKMapView!
var geoCoder = CLGeocoder()
//Initial cooridinate
var latitude = 43.136581
var longitude = -87.941101
var latitudeDelta = 0.3
var longitudeDelta = 0.3
//the object that determines the location
let placeManger = CLLocationManager()
//loading the map on the scene
override func loadView() {
super.loadView()
mapView = MKMapView()
view = mapView
placeManger.startUpdatingLocation()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
navigationItem.title = "Travel Wishlist"
navigationController?.navigationBar.prefersLargeTitles = true
navigationController?.navigationBar.barTintColor = .blue
placeManger.delegate = self
placeManger.requestWhenInUseAuthorization()
mapView.delegate = self
navigationItem.rightBarButtonItem = rightBar
navigationItem.leftBarButtonItem = leftBar
mapView.addGestureRecognizer(tapGestrueRecongnizer)
centerMapInInitialCoordinates()
showPointsOfInterestInMap()
}
func showPointsOfInterestInMap() {
mapView.removeAnnotations(mapView.annotations)
for point in poi {
let pin = PlaceList(point: point)
mapView.addAnnotation(pin as! MKAnnotation)
}
}
func centerMapInInitialCoordinates() {
let span:MKCoordinateSpan = MKCoordinateSpan(latitudeDelta: latitudeDelta, longitudeDelta: longitudeDelta)
let region:MKCoordinateRegion = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: latitude, longitude: longitude), span: span)
mapView.setRegion(region, animated: true)
}
var tapGestrueRecongnizer: UITapGestureRecognizer {
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(loadPointOfInterests(recongnizer:)))
return tapGesture
}
var rightBar: UIBarButtonItem {
let rightBarButton =
UIBarButtonItem(title: "Find a place to add",
style: .plain, target: self,
action: #selector(rightbarButton))
rightBarButton.tintColor = .white
return rightBarButton
}
var leftBar: UIBarButtonItem {
let leftBarButton =
UIBarButtonItem(title:
"Look up", style: .plain,
target: self, action: #selector(leftButton))
leftBarButton.tintColor = .white
return leftBarButton
}
#objc func leftButton(leftButton: UIBarButtonItem) {
print("Left BarButton")
performSegue(withIdentifier: "place", sender: leftButton)
addPlace()
}
#objc func rightbarButton(right: UIBarButtonItem) {
addPlace()
}
func addPlace(){
// mapView.removeAnnotations(mapView.annotations)
for point in pointOfInterest {
let pin = PlaceList(point: point)
mapView.addAnnotation(pin as! MKAnnotation)
}
filterVisiblePOI()
}
func filterVisiblePOI() {
let visibleAnnotations = self.mapView.annotations(in: self.mapView.visibleMapRect)
var annotations = [PlaceList]()
for visibleAnnotation in visibleAnnotations {
if let annotation = visibleAnnotation as? PlaceList {
annotations.append(annotation)
}
}
}
#objc func loadPointOfInterests(recongnizer:UITapGestureRecognizer) {
let locationPoint = recongnizer.location(in: mapView)
let cooridinate = mapView.convert(locationPoint, toCoordinateFrom: mapView)
let annotation = MKPointAnnotation()
annotation.coordinate = cooridinate
mapView.addAnnotation(annotation)
geoCoder.reverseGeocodeLocation(CLLocation(latitude: cooridinate.latitude, longitude: cooridinate.longitude)) {(placeMarks : [CLPlacemark]?, error: Error?) in
if let placeLocation = placeMarks?[0] {
if error == nil && (placeMarks?.count)! > 0 {
let locationString = " \(placeLocation.name!)"
annotation.coordinate = cooridinate
annotation.title = locationString
print(locationString)
}
for point in self.pointOfInterest {
let pin = PlaceList(point: point)
self.mapView.addAnnotation(pin as! MKAnnotation)
self.poi.append(point)
print(point)
print(self.pointOfInterest)
print(pin)
}
}
}
}
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
self.navigationItem.rightBarButtonItem?.title = "Find a place to add"
}
private func mapView(mapView: MKMapView, didSelectAnnotationView view: MKAnnotationView) {
//To Do
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "place" {
let nav = segue.destination as! UINavigationController
let detailViewControll = nav.topViewController as! VisitationTableViewController
for point in pointOfInterest {
let pin = PlaceList(point: point)
mapView.addAnnotation(pin as! MKAnnotation)
detailViewControll.poi = pointOfInterest
}
}
}
}
import Foundation
import UIKit
class VisitationTableViewController: UITableViewController {
var poi: [Places] = []
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
let dissButton = UIBarButtonItem(title: "Done", style: .done
, target: self, action: #selector(dismisController))
self.navigationItem.rightBarButtonItem = dissButton
dissButton.tintColor = .white
navigationController?.navigationBar.prefersLargeTitles = true
navigationItem.title = "Visited"
navigationController?.navigationBar.barTintColor = .blue
print("view didload")
print(poi)
}
#objc func dismisController() {
presentingViewController?.dismiss(animated: true, completion: nil)
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return poi.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "locationCell", for: indexPath)
let point = poi[indexPath.row]
cell.textLabel?.text = point.name
cell.detailTextLabel?.text = "(\(point.coordinate.latitude), \(point.coordinate.longitude))"
return cell
}
}

Answer 1

You may need
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
self.performSegue(withIdentifier:"place",sender:nil)
}
And make sure segue source is connected to the vc itself ( drag it from yellow roundec icon of mapVC inside IB )

Answer 2

When I ran the code, tapping into the map didn't add any object to pointOfInterest, which you are making a loop on loadPointOfInterests to add an object to poi but its empty, so make sure to add a Place object in poi
In VisitationTableViewController, make sure to add
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "locationCell")
}