In ContentView, use an array of MKPolylines, manage them in some function that adds/removes polylines based on user interaction, and then place them in the Map() in a ForEach loop. It may not be as efficient as they claim MKMultiPolyline to be, but it gets n-number of polylines on the map.
Top of the ContentView struct:
@State private var multiPolylines = [MKPolyline]()
Using them in the Map:
Map() {
ForEach(multiPolylines, id:\.self) { polyline in
MapPolyline(polyline)
.stroke(.pink, lineWidth: 3)
}
}
CaneApp
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