Google maps GMSMarker changes camera focus iOS - ios

Question

I am having an issue that GMSMarker changes camera focus on any kind of popup alert or whenever I tap on marker and app navigates to google maps application. Following is my implementation. I add google maps container to my viewcontroller header in layoutsubviews method. No idea what's going on. Kindly help.
override func viewDidLayoutSubviews()
{
super.viewDidLayoutSubviews()
if mapView == nil
{
let camera = GMSCameraPosition.camera(withLatitude: 45.582045, longitude:74.32937, zoom: 14.0)
mapView = GMSMapView.map(withFrame: CGRect(x: 0, y: 0, width: self.mapContainerView.bounds.size.width, height: self.mapContainerView.bounds.size.height), camera: camera)
mapView.delegate = self
do {
// Set the map style by passing the URL of the local file.
if let styleURL = Bundle.main.url(forResource: "style", withExtension: "json") {
mapView.mapStyle = try GMSMapStyle(contentsOfFileURL: styleURL)
} else {
NSLog("Unable to find style.json")
}
} catch {
NSLog("One or more of the map styles failed to load. \(error)")
}
self.mapContainerView.addSubview(mapView)
mapView.settings.setAllGesturesEnabled(false)
let marker = AppointmentMapDataManager(mapView: mapView).setAppointmentMarker()
// let location = GMSCameraPosition.camera(withLatitude: marker.position.latitude,
// longitude: marker.position.longitude,
// zoom: 14)
// mapView.camera = location
var bounds = GMSCoordinateBounds()
bounds = bounds.includingCoordinate((marker as AnyObject).position)
let update = GMSCameraUpdate.fit(bounds, with: UIEdgeInsets(top: self.mapContainerView.frame.height/2 - 33, left: self.mapContainerView.frame.width/2 - 81, bottom: 0, right: 0))
mapView.moveCamera(update)
}
}

Answer 1

Instead of move your camera in the viewDidLayoutSubView which is a wrong approach use didTap method of the GMSMapViewDelegate or if you want to do it automatically use a execute after delay
//method for center camera based in your own code
func centerInMarker(marker: GMSMarker) {
var bounds = GMSCoordinateBounds()
bounds = bounds.includingCoordinate((marker as AnyObject).position)
let update = GMSCameraUpdate.fit(bounds, with: UIEdgeInsets(top: (self.mapView?.frame.height)!/2 - 33, left: (self.mapView?.frame.width)!/2 - 81, bottom: 0, right: 0))
mapView?.moveCamera(update)
}
You can use it in the delegate method
func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {
self.centerInMarker(marker: marker)
return true
}
Or simply when you add your marker, with delay
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
self.centerInMarker(marker: marker)
}

Answer 2

You should add in viewDidLoad method, and update frame in viewDidLayoutSubviews.