CODEWITHSUNDEEP
iosswiftmkmapviewmapkit
coding22
coding22

Reputation: 689

Getting this error when using MKMapView! : "fatal error unexpectedley found nil while unwrapping optional value"

Im trying to show the user's location and a map of the location using MKMapView but I get an error when doing so. I get an error for this line of code: map.delegate = self. Here's the full code, can someone tell me what I'm doing wrong. I looked at other tutorials and they have it the same way I have it setup and it works for them. Thank you!

import Foundation
import SpriteKit
import CoreLocation
import MapKit



class MapScene: SKScene, CLLocationManagerDelegate, MKMapViewDelegate {
var locationMangaer = CLLocationManager()
var map : MKMapView!

override func didMoveToView(view: SKView) {

    locationMangaer.delegate = self
    locationMangaer.desiredAccuracy = kCLLocationAccuracyBest
    locationMangaer.requestWhenInUseAuthorization()
    locationMangaer.startUpdatingLocation()
    locationMangaer.requestAlwaysAuthorization()

    map.delegate = self
    map.showsUserLocation = true


}



//DELEGATE METHODS

func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {

    println("error")
}



func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {


    var userLocation: CLLocation = locations[0] as! CLLocation
    locationMangaer.stopUpdatingLocation()

    let location = CLLocationCoordinate2DMake(userLocation.coordinate.latitude, userLocation.coordinate.longitude)
    let span = MKCoordinateSpanMake(0.05, 0.05)
    let region = MKCoordinateRegion(center: location, span: span)

    map.setRegion(region, animated: true)
    map.centerCoordinate = userLocation.coordinate


    println("call")
}

Upvotes: 0

Views: 1366

Answers (2)

rshev
rshev

Reputation: 4176

Tried your code. Make it work with the following changes:

Comment out

locationMangaer.requestAlwaysAuthorization()

Comment out

mapView.centerCoordinate = userLocation.coordinate

Add the following String entry to Info.plist:

NSLocationWhenInUseUsageDescription

with any text.

Upvotes: 0

72A12F4E
72A12F4E

Reputation: 1754

When you declare your map variable, you do not provide a default value, and it doesn't instantiate properly.

What you need to do is hook it up to a view in your storyboard with an @IBOutlet,

@IBOutlet weak var map : MKMapView!

or if you are manually creating your view hierarchy, instantiate a MKMapView with a default value.

var map : MKMapView! = MKMapView()

I recommend the former.

Upvotes: 3

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