Swift loop through array - ios

Question

I'm trying to loop through an array with coordinates and show markers on a map with this code:
for index in 0...3 {
let latitude: Double = latCoordinate.objectAtIndex(index) as! Double
let longitude: Double = longCoordinate.objectAtIndex(index) as! Double
let position = CLLocationCoordinate2DMake(latitude, longitude)
print([latitude],[longitude])
let marker = GMSMarker(position: position)
marker.title = "Hello World"
marker.map = self.mapView
}
But I just get one marker on the map, it should be 4. Why can't I see the other markers on the map?

Answer 1

Your code looks good for displaying the marker, but are you sure the coordinates are correct? - Just looked at the comments again and the issue is in how you're populating your array, if you only have one coordinate in your array then you're only going to see one marker on the map.
This code from my app adds all the coordinates to a GMSCoordinateBounds and then sets the GMSMapView camera to the bounds of all the coordinates - so everything should be visible on the displayed map.
func plotAll(){
let bounds = GMSCoordinateBounds.init()
for property in fetchedResultsController.fetchedObjects!
{
let capitalAsset : CapitalAsset = property as! CapitalAsset
let marker = GMSMarker.init()
marker.draggable = false
marker.snippet = capitalAsset.address
let location = CLLocationCoordinate2DMake(Double(capitalAsset.latitude!), Double(capitalAsset.longitude!))
marker.position = location
marker.map = mapView
// Update bounds to include marker
bounds.includingCoordinate(marker.position)
}
let camera = mapView.cameraForBounds(bounds, insets:UIEdgeInsetsZero)
mapView.camera = camera;
}
Hope that helps.