addressDictionary returns random nil - ios

Question

I've used this code for my App. Its works great but sometime crashes, after +/- 50 secondes of tracking my route. I know it has something to do with the optionals "?", but I can't get it to work.
I get the following message:
fatal error: unexpectedly found nil while unwrapping an Optional
Part where the code breaks:
if let locationName = placeMark.addressDictionary?["Name"] as? NSString
{
print(locationName)
self.locationName = locationName as String
}
Full locationManager code:
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
for location in locations as [CLLocation] {
let howRecent = location.timestamp.timeIntervalSinceNow
//start motion tracker
motionTracker()
//location name tracker
let locValue:CLLocationCoordinate2D = manager.location!.coordinate
let latitude: CLLocationDegrees = locValue.latitude
let longitude: CLLocationDegrees = locValue.longitude
let geoCoder = CLGeocoder()
let location = CLLocation(latitude: latitude, longitude: longitude)
geoCoder.reverseGeocodeLocation(location)
{
(placemarks, error) -> Void in
let placeArray = placemarks as [CLPlacemark]!
// Place details
var placeMark: CLPlacemark!
placeMark = placeArray?[0]
// Address dictionary
print(placeMark.addressDictionary)
// Location name
if let locationName = placeMark.addressDictionary?["Name"] as? NSString
{
print(locationName)
self.locationName = locationName as String
}
// Street address
if let street = placeMark.addressDictionary?["Thoroughfare"] as? NSString
{
//print(street)
self.locationStreet = street as String
}
// City
if let city = placeMark.addressDictionary?["City"] as? NSString
{
self.locationCity = city as String
//print(city)
}
// Zip code
if let zip = placeMark.addressDictionary?["ZIP"] as? NSString
{
//print(zip)
}
// Country
if let country = placeMark.addressDictionary?["Country"] as? NSString
{
//print(country)
}
}

Answer 1

I suspect you’re hitting a case where Google doesn’t have a reverse geocode result for your location and is returning an empty array.
Instead of:
let placeArray = placemarks as [CLPlacemark]!
var placemark: CLPlacemark!
placemark = placeArray?[0]
… which assumes that there will be an array and it will always contain at least one element, use:
if let placemark = placemarks?.first {
// Rest of your code
}