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SOLVED: Hacking with macOS, project5, type of expression is ambiguous without more context

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I'm working on project5 and am getting the error "type of expression is ambiguous without more context" on the line "return annotationView" in the func mapView. Here's the full code:

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotation? {
        guard let pin = annotation as? Pin else { return nil }
        let identifier = "Guess"
        var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier) as? MKPinAnnotationView
        if annotationView == nil {
            annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
        } else {
            annotationView!.annotation = annotation
        annotationView?.canShowCallout = true
        annotationView?.pinTintColor = pin.color

        return annotationView   //type of expression is ambiguous without more context


This is using Xcode 12.2

any ideas what's causing this error?


Your return value from the method needs to be MKAnnotationView? instead of MKAnnotation?.


thanks @roosterboy that did it!


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