CODEWITHSUNDEEP
iosswiftxcodecore-locationcllocationmanager
moe safar
moe safar

Reputation: 150

Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value using CoreLocation

I'm really new to swift and am trying to figure out why I am getting a nil value when running this program. I have tried adding a func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [CLLocation]!) but that didn't seem to work. Any help would be greatly appreciated. Thanks

Here is the code (PS: This is the value of the variable locManager: var locManager = CLLocationManager()

override func viewDidLoad() {
        super.viewDidLoad()
        tableView.backgroundColor = UIColor.systemGreen
        tableView.estimatedRowHeight = 100
        tableView.rowHeight = UITableView.automaticDimension
        
        locManager.requestWhenInUseAuthorization()
        func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [CLLocation]!) {
            let locationZoom = locations.last as! CLLocation
            
        }
        if CLLocationManager.authorizationStatus() == .authorizedWhenInUse || CLLocationManager.authorizationStatus() ==  .authorizedAlways
        {
            currentLocation = locManager.location
            //getting locations
            let longa = currentLocation.coordinate.longitude ***<- (Error occurring at this line)*** 
            let latta = currentLocation.coordinate.latitude
            nearbyLocations1(latitude: latta, longitude: longa) { (longitude, latitude, name, vicinity) in
                       
                    print("name 1 is ", name)
                   }
            nearbyLocations2(latitude: latta, longitude: longa) { (longitude, latitude, name, vicinity) in
                print("name 2 is ", name)
            }
            
        } 
        
    
    }

Upvotes: 0

Views: 220

Answers (2)

vadian
vadian

Reputation: 285072

There are two major issues:

  1. The method didUpdateLocations must be declared on the top level of the class (same level as viewDidLoad) and all the code to process the location must be inside this method

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [CLLocation]!) {
     guard let currentLocation = locations.last else { return }
     //getting locations
     let longa = currentLocation.coordinate.longitude 
     let latta = currentLocation.coordinate.latitude
     nearbyLocations1(latitude: latta, longitude: longa) { (longitude, latitude, name, vicinity) in                       
         print("name 1 is ", name)
     }
     nearbyLocations2(latitude: latta, longitude: longa) { (longitude, latitude, name, vicinity) in
         print("name 2 is ", name)
     }
}
  1. To get the locations you have to set the delegate of the location manager to self and call startUpdatingLocation()

Upvotes: 1

gnasher729
gnasher729

Reputation: 52538

Probably currentLocation = nil. Use

if let currentLocation = locManager.location {
    // Code for currentLocation != nil
} else {
    // Code for currentLocation == nil
}

or something similar.

Upvotes: 1

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