How to access IBOutlet in UITableViewController Class if the IBOutlet is in UIViewController Class

Question

 class AClass: UIViewController,CLLocationManagerDelegate,MKMapViewDelegate {

        @IBOutlet var mapKitView: MKMapView!

        }

    class BClass: UITableViewController {

    var localAClass=AClass()
    localAClass.mapKitView.mapType=MKMapType.standard 

    }

Fatal error: Unexpectedly found nil while unwrapping an Optional value

Answer 1

In ClassB, you need to use UIStoryboard instantiateViewController(withIdentifier:) to have IBOutlets instantiated.

let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let viewController = 
storyboard.instantiateViewController("AClassIdentifier") as! 
AClass

And then still, IBOutlets views aren't instantiated until viewDidLoad() for that class. Your ClassA would need a second property such as mapType , and ClassB sets that property instead of directly on the view. Then in ClassA viewDidLoad you can set the actual mapView based on this stored property.