Google map Zooming - swift

Question

I'm trying to zoom google map on particular pin from lat long.it working fine but i want to change pin image when zoom in on pin in swift.i have doing like this but there have putting 2 image on same lat long.
func zoom(lat: Double, long : Double){
CATransaction.begin()
CATransaction.setValue(1, forKey: kCATransactionAnimationDuration)
// It will animate your camera to the specified lat and long
let camera = GMSCameraPosition.camera(withLatitude: lat, longitude: long, zoom: 15)
self.mapView!.animate(to: camera)
let position = CLLocationCoordinate2D(latitude: lat,longitude: long)
let marker = GMSMarker()
marker.map = self.mapView
marker.icon = UIImage.init(named: "pin-1")
CATransaction.commit()
}

Answer 1

You can put a function that detects changes in your zoom level then put a condition that will change the value of your marker icon.
Here is how my code looks like:
import UIKit
import GoogleMaps
class ViewController: UIViewController, GMSMapViewDelegate {
let marker = GMSMarker()
override func viewDidLoad() {
}
override func loadView() {
// Create a GMSCameraPosition that tells the map to display the
// coordinate -33.86,151.20 at zoom level 6.
let camera = GMSCameraPosition.camera(withLatitude: -33.86, longitude: 151.20, zoom: 6.0)
let mapView = GMSMapView.map(withFrame: CGRect.zero, camera: camera)
self.view = mapView
mapView.delegate = self
// Creates a marker in the coordinate of the map.
marker.position = CLLocationCoordinate2D(latitude: -33.86, longitude: 151.20)
marker.title = "Sydney"
marker.snippet = "Australia"
marker.map = mapView
marker.icon = UIImage(named: "pin_orange")
}
//This detect the changes in the cameraposition
func mapView(_ mapView: GMSMapView, didChange position: GMSCameraPosition) {
let zoom = mapView.camera.zoom
print("map zoom is ",String(zoom))
//put a condition here to change the icon of your marker
if zoom > 6 {
marker.icon = UIImage(named: "icon1")
}else{
marker.icon = UIImage(named: "icon2")
}
}
}
Hope this helps!