I have an array of latitudes and another array of longitudes that I add to an array of type CLLocationCoordinate2D. I then use the new array to annotate multiple points on the map. Some, or most, or maybe even all of the annotations are displaying on the map but as I zoom in (yes, zoom IN), some of the annotations disappear, then come back, or dont. Any ideas on how to keep them all visible? This is behavior I would expect while zooming out, not in.
Here is the code i'm using for what i've described above.
import UIKit
import MapKit
import CoreLocation
class MultiMapVC: UIViewController, CLLocationManagerDelegate {
@IBOutlet weak var multiEventMap: MKMapView!
var latDouble = Double()
var longDouble = Double()
let manager = CLLocationManager()
var receivedArrayOfLats = [Double]()
var receivedArrayOfLongs = [Double]()
var locations = [CLLocationCoordinate2D]()
func locationManager(_ manager: CLLocationManager, didUpdateLocations uLocation: [CLLocation]) {
let userLocation = uLocation[0]
let span:MKCoordinateSpan = MKCoordinateSpanMake(0.3, 0.3)
let usersLocation = userLocation.coordinate
let region:MKCoordinateRegion = MKCoordinateRegionMake(usersLocation, span)
multiEventMap.setRegion(region, animated: true)
manager.distanceFilter = 1000
self.multiEventMap.showsUserLocation = true
}
func multiPoint() {
var coordinateArray: [CLLocationCoordinate2D] = []
print ("Received Longitude Count = \(receivedArrayOfLongs.count)")
print ("Received Latitude Count = \(receivedArrayOfLats.count)")
if receivedArrayOfLats.count == receivedArrayOfLongs.count {
for i in 0 ..< receivedArrayOfLats.count {
let eventLocation = CLLocationCoordinate2DMake(receivedArrayOfLats[i], receivedArrayOfLongs[i])
coordinateArray.append(eventLocation)
print (coordinateArray.count)
}
}
for events in coordinateArray {
let annotation = MKPointAnnotation()
annotation.coordinate = CLLocationCoordinate2D(latitude: events.latitude, longitude: events.longitude)
multiEventMap.addAnnotation(annotation)
}
}
override func viewDidLoad() {
super.viewDidLoad()
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestWhenInUseAuthorization()
manager.startUpdatingLocation()
multiPoint()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
multiEventMap.removeFromSuperview()
self.multiEventMap = nil
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}