Swift MapKit Annotation using coordinate from API not showing up on map

Question

I used coordinate from API to put an annotation on map, but it didn't show up while:

I declared a new coordinate which is not from API, can show up on map.
I can print the coordinate form API, and the coordinate was fine.
I put mapView.addAnnotation() in DispatchQueue.main.async.

Can anyone tell me how to fix it? Thanks! Here is my code:

extension LocationViewController: ParkProviderDelegate {
func didFetch(by provider: ParkProvider) {

    DispatchQueue.main.async {
        let annotation = MKPointAnnotation()
        let coordinate = self.provider.parks[0].coordinate
        self.mapView?.addAnnotation(annotation)
    }
}

set `annotation.coordinate = coordinate` – Kamran Jun 05 '18 at 09:09 — Kamran, Jun 05 '18 at 09:09
Also check https://stackoverflow.com/questions/28225296 – Kamran Jun 05 '18 at 09:10 — Kamran, Jun 05 '18 at 09:10

score 0 · Accepted Answer · answered Jun 05 '18 at 10:37

Try the following code:

DispatchQueue.main.async {
    let annotation = MKPointAnnotation()
    let coordinate = self.provider.parks[0].coordinate
    annotation.coordinate = coordinate
    annotation.title = "title"
    annotation.subtitle = "subtitle"
    self.mapView?.addAnnotation(annotation)
}

Swift MapKit Annotation using coordinate from API not showing up on map

1 Answers1