ребят в чем проблема ?
@IBOutlet weak var leadingConstraint: NSLayoutConstraint!
var menuShowing = false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let camera =
GMSCameraPosition.camera(withLatitude: 42.856734, longitude: 74.618816, zoom: 14)
let mapView =
GMSMapView.map(withFrame:
CGRect.zero, camera: camera)
mapView.isMyLocationEnabled = true
view = mapView
// Creates a marker in the center of the map.
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude: 42.856734, longitude: 74.618816)
marker.title = "Bishkek"
marker.snippet = "Kyrgyzstan"
marker.map = mapView
}
@IBAction func openMenu(_ sender: Any) {
if (menuShowing) {
leadingConstraint.constant = -250
}
else {
leadingConstraint.constant = 0
}
menuShowing = !menuShowing
}
fatal error: unexpectedly found nil while unwrapping an Optional value