Accessing a variable outside of a function in Swift

Question

I want to call a variable (var view) that it is defined in another function (func mapView).

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView?{ if annotation is MapSeismometerAnnotation{ if let annotation = annotation as? MapSeismometerAnnotation{ var view: MKPinAnnotationView view = MKPinAnnotationView(annotation: annotation,reuseIdentifier:annotation.identifier) ... ... } @IBAction func pressPlay(_ sender: Any){ //I want to call here the variable view }

My class is:

class MapViewController: UIViewController,MKMapViewDelegate,CLLocationManagerDelegate,SCSEarthquakesHandler,SCSPublicSeismometersHandler{

If I define the variable var view: MKPinAnnotationView under the class (outside the function), Xcode return me this error:

Cannot override mutable property 'view' of type 'UIView?' with covariant type 'MKPinAnnotationView'

How can I solve this?

I want to call a variable (var view) please elaborate what is the problem - you can't call a variable inside a function — Shehata Gamal
– Shehata Gamal, Commented Oct 7, 2020 at 11:03
view is a property which is already defined in UIViewController . So you must rename that var to some other name. And if you already declared a property {var view: MKPinAnnotationView} , then again adding var view will be resulting in a new local variable within the method . — ManuRaphy
– ManuRaphy, Commented Oct 7, 2020 at 11:07

Shehata Gamal · Accepted Answer · 2020-10-07 11:30:11Z

2

Set another name

var otherName: MKPinAnnotationView

view variable name conflicts with the vc's UIView property

edited Oct 7, 2020 at 11:30

answered Oct 7, 2020 at 11:00

Shehata Gamal

101k8 gold badges75 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Kaspar · Accepted Answer · 2020-10-07 11:04:24Z

View is not overridable because it is used by the UIViewController. Therefore you need to assign another name to the variable than view.

For example: var annotationView: MKAnnotationView is allowed.

Kstin · Accepted Answer · 2020-10-07 11:04:56Z

view is already defined variable in UIViewController. Pick another name for your MKPinAnnotationView

Collectives™ on Stack Overflow

Accessing a variable outside of a function in Swift

3 Answers 3

Comments

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Related