UPGRADE YOUR SKILLS: Learn advanced Swift and SwiftUI on Hacking with Swift+! >>

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

Forums > Books

Hi,

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?

3      

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

3      

thanks @roosterboy that did it!

3      

TAKE YOUR SKILLS TO THE NEXT LEVEL If you like Hacking with Swift, you'll love Hacking with Swift+ – it's my premium service where you can learn advanced Swift and SwiftUI, functional programming, algorithms, and more. Plus it comes with stacks of benefits, including monthly live streams, downloadable projects, a 20% discount on all books, and free gifts!

Find out more

Sponsor Hacking with Swift and reach the world's largest Swift community!

Archived topic

This topic has been closed due to inactivity, so you can't reply. Please create a new topic if you need to.

All interactions here are governed by our code of conduct.

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.