Change Camera Zoom based on Radius Google Maps iOS SDK

Question

I am working on an app that displays certain markers based on a radius around your current location. The radius is between 100 - 5000 meters. I change the radius with an U

Answer 1

With the help of Saxon Druce,finally I did it.

class MapUtil {

class func translateCoordinate(coordinate: CLLocationCoordinate2D, metersLat: Double,metersLong: Double) -> (CLLocationCoordinate2D) {
    var tempCoord = coordinate

    let tempRegion = MKCoordinateRegionMakeWithDistance(coordinate, metersLat, metersLong)
    let tempSpan = tempRegion.span

    tempCoord.latitude = coordinate.latitude + tempSpan.latitudeDelta
    tempCoord.longitude = coordinate.longitude + tempSpan.longitudeDelta

    return tempCoord
}

class func setRadius(radius: Double,withCity city: CLLocationCoordinate2D,InMapView mapView: GMSMapView) {

    let range = MapUtil.translateCoordinate(city, metersLat: radius * 2, metersLong: radius * 2)

    let bounds = GMSCoordinateBounds(coordinate: city, coordinate: range)

    let update = GMSCameraUpdate.fitBounds(bounds, withPadding: 5.0)    // padding set to 5.0

    mapView.moveCamera(update)

    // location
    let marker = GMSMarker(position: city)
    marker.title = "title"
    marker.snippet = "snippet"
    marker.flat = true
    marker.map = mapView

    // draw circle
    let circle = GMSCircle(position: city, radius: radius)
    circle.map = mapView
    circle.fillColor = UIColor(red:0.09, green:0.6, blue:0.41, alpha:0.5)

    mapView.animateToLocation(city) // animate to center
}

}