Display UIViewRepresentable in WidgetKit

Question

Created Jun ’20

Replies 2

Boosts 0

Views 2.2k

Participants 3

Hi,

I'm trying to Display a MapView like the sytem Maps app does in a Widget.

I thought the best way would be to encapsulate the Mapview in a UIViewRepresentable like this:

Code Block struct MapView: UIViewRepresentable {
  func makeUIView(context: UIViewRepresentableContext<MapView>) -> MKMapView {
    let mapView = MKMapView()
    return mapView
  }
  func updateUIView(_ view: MKMapView, context: UIViewRepresentableContext<MapView>) {
  }
}

And show it like this in my Widget:

Code Block struct MapWidgetEntryView : View {
  var entry: Provider.Entry
  var body: some View {
    VStack {
      MapView()
    }
  }
}

Unfortunately this leads to this error:

Code Block RemoteHumanReadableError: The operation couldn’t be completed. (BSServiceConnectionErrorDomain error 3.)
BSServiceConnectionErrorDomain (3):
==BSErrorCodeDescription: OperationFailed

I also tested this with other UIKit classes and it leads to the same error

Answered by in 617362022

Hello, our recommendation for displaying Maps content in widgets is to use a MKMapSnapshotter in your TimelineProvider methods. UIViewRepresentable is not supported in widgets.

Boost

Answer 1

OP

Apple

Jun ’20

Accepted Answer

Hello, our recommendation for displaying Maps content in widgets is to use a MKMapSnapshotter in your TimelineProvider methods. UIViewRepresentable is not supported in widgets.

1

Answer 2

MeanRaw OP

Nov ’20

I've tried MKMapSnapshotter in the TimelineProvider as suggested in the accepted answer, but the completion handler of the start is never called (snapshot is a MKMapSnapshotter object and I have verified that the callback is called when this code runs on the actual app and not the widget TimelineProvider. What am I missing?

Code Block      snapshot.start { (snapshot, error) in      let image = snapshot?.image // Image(uiImage: snapshot?.image)
      completionHandler(image)
    }

0