我不知道为什么表视图控制器没有填充placeMarks.name和coordinates。用户点击地图上的图钉，然后将位置添加到模型中。但是，它将数据发送到表视图控制器的位置并没有显示模型中的数据。下面是我的代码。
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
}
}
答案 0 :(得分：0)
您可能需要
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
self.performSegue(withIdentifier:"place",sender:nil)
}
并确保segue源已连接到vc本身（将其从IB中mapVC的黄色roundec图标中拖动出来）
答案 1 :(得分：0)
当我运行代码时，点击地图并没有向pointOfInterest添加任何对象，您正在loadPointOfInterests上循环以向poi添加对象，但是为空，因此请确保在Place
poi对象
在VisitationTableViewController中，确保添加
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "locationCell")
}