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iOS

Posted by Tim Edgren
Tim Edgren
7,437 Points

got the “unexpectedly found nil while unwrapping an Optional value” error

m using google places api to and use the coordinates to put an annotation on an apple maps.

What I want to do now is to translate coordinates to name and address and use it for the Ekreminder. This is my code so far but i get the error "fatal error: unexpectedly found nil while unwrapping an Optional value" when i try to run it:

    addLocationReminderViewController.name = self.mapItemData.placemark.name

    // Construct the address
    let dic = self.mapItemData.placemark.addressDictionary as Dictionary!
    let city = dic["City"] as! String
    let state = dic["State"] as! String
    let country = dic["Country"] as! String
    addLocationReminderViewController.address = "\(city), \(state), \(country)"
}
Steve Hunter
Steve Hunter
57,712 Points

What produces nil? Is it the dictionary itself, or one of its fields?

Steve.

3 Answers

Tim Edgren
Tim Edgren
7,437 Points
Tim Edgren
Tim Edgren
7,437 Points

This is producing nil:

                    if data != nil{
                    let dic = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableLeaves) as!  NSDictionary

                    let lat = dic["results"]?.valueForKey("geometry")?.valueForKey("location")?.valueForKey("lat")?.objectAtIndex(0) as! Double
                    let lon = dic["results"]?.valueForKey("geometry")?.valueForKey("location")?.valueForKey("lng")?.objectAtIndex(0) as! Double
                    let point = MKPointAnnotation()
                    point.coordinate = CLLocationCoordinate2D(latitude: lat, longitude: lon)
                    point.title = self.resultsArray[indexPath.row]
                    let region = MKCoordinateRegion(center: point.coordinate, span: MKCoordinateSpan(latitudeDelta: 0.1, longitudeDelta: 0.1))
                    dispatch_async(dispatch_get_main_queue(), { () -> Void in
                        self.mapView.setRegion(region, animated: true)
                        self.mapView.addAnnotation(point)
                        self.mapView.selectAnnotation(point, animated: true)
                        //
                        let placemark = MKPlacemark(coordinate: point.coordinate, addressDictionary: nil)
                        let mapItem = MKMapItem(placemark: placemark)
                        self.mapItemData = mapItem
                        //
                    })
Steve Hunter
Steve Hunter
57,712 Points

There must be a specific line that's unwrapping an optional to find nil rather than the expected value? Is it the test on the first line, such that data is nil, meaning the rest of that code doesn't run - or is it some other line?

Steve.

Tim Edgren
Tim Edgren
7,437 Points
Tim Edgren
Tim Edgren
7,437 Points

Im trying to translate it to get the address to show in a string

Tim Edgren
Tim Edgren
7,437 Points
Tim Edgren
Tim Edgren
7,437 Points

This maybe:

    override func viewDidLoad() {
        super.viewDidLoad()
        // Display the name and address of the location associated with this new reminder
        self.nameLabel.text = "Location: \(self.name ?? "")"
        self.addressName.text = self.name
        self.addressName.text = self.address
    }
Steve Hunter
Steve Hunter
57,712 Points

OK - you're going to have to pin the error down far more accurately. There's no way we can look at snippets of your code with no context as to what files the code is in within your project and come up with a solution to such a broad error.

Use some breakpoints, explore what works and what doesn't and generate some context for your question. For example, is your data variable nil? If it isn't what's in there? What's contained in your dic dictionary? Does it hold a dictionary, or nothing?

You could also push your project to a Github-type resource so we can pull your code down and replicate the error.

But if you can't say which bit of code is causing the error it is impossible for me to second-guess what the problem might be.

Sorry to be unhelpful, but there's nothing for me to go on here.

Steve.