How to make google map tiles tapable in swift - swift

Question

I'm working with google maps sdk in ios9 and I'm currently displaying tile layers over the map with different colors that represent a value. I want to add the ability to tap a tile and display information about the tile such as what the actual value of that tile is. I looked online and the only thing I found was to make transparent markers for each tile and then write a handler for each marker to display the value, but I think there has to be a more efficient way to do this. Can someone lead me in the right direction? Thanks!
class MyMapView: UIView{
var myMap: GMSMapView!
var closestPoint: CLLocationCoordinate2D!
required init?(coder aDecoder: NSCoder) {
fatalError("This class does not support NSCoding")
}
init(closestPoint: CLLocationCoordinate2D!){
super.init(frame: CGRectZero)
self.backgroundColor = UIVariables.blackOpaque
self.closestPoint = closestPoint
var camera = GMSCameraPosition.cameraWithLatitude(AppVariables.location2D!.latitude, longitude: AppVariables.location2D!.longitude, zoom: 6)
self.myMap = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
self.myMap.mapType = GoogleMaps.kGMSTypeSatellite
delay(seconds: 0.5) { () -> () in
let path = GMSMutablePath()
path.addCoordinate(self.closestPoint!)
path.addCoordinate(AppVariables.location2D!)
let bounds = GMSCoordinateBounds(path: path)
self.myMap.moveCamera(GMSCameraUpdate.fitBounds(bounds, withPadding: 50.0))
let layer = MyMapTileLayer()
layer.map = self.myMap
}
self.myMap.translatesAutoresizingMaskIntoConstraints = false
//self.frame = CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, 400)
self.addSubview(self.myMap)
let viewsDictionary = ["map": self.myMap]
let metricDictionary = ["width": self.frame.size.width/2]
let view_constraint_V1:Array = NSLayoutConstraint.constraintsWithVisualFormat("V:|[map]-15-|", options: NSLayoutFormatOptions.AlignAllLeading, metrics: metricDictionary, views: viewsDictionary)
let view_constraint_H1:Array = NSLayoutConstraint.constraintsWithVisualFormat("H:|-10-[map]-10-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: metricDictionary, views: viewsDictionary)
self.addConstraints(view_constraint_V1)
self.addConstraints(view_constraint_H1)
}
func delay(seconds seconds: Double, completion:()->()) {
let popTime = dispatch_time(DISPATCH_TIME_NOW, Int64( Double(NSEC_PER_SEC) * seconds ))
dispatch_after(popTime, dispatch_get_main_queue()) {
completion()
}
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
}
class MyTileLayer: GMSTileLayer{
var webService = WebService()
override func requestTileForX(x: UInt, y: UInt, zoom: UInt, receiver: GMSTileReceiver!) {
webService.getTiles(x, y: y, z: zoom, completion: { (result) -> Void in
receiver.receiveTileWithX(x, y: y, zoom: zoom, image: UIImage(data: result))
})
}
}