PNG Tiles are showing incorrect color and transparency on iOS. Transparent areas show up as a semi-transparent white. The same tile set shows up correctly on Android and web browser, so I don't believe it is an issue is with the tiles themselves. Here's my Swift code:
class ViewController: UIViewController {
@IBOutlet weak var mapView: GMSMapView!
override func viewDidLoad() {
super.viewDidLoad()
let camera = GMSCameraPosition.camera(withLatitude: 30.00, longitude: -90, zoom: 7.0)
let mapView = GMSMapView.map(withFrame: CGRect.zero, camera: camera)
view = mapView
// Implement GMSTileURLConstructor
let urls: GMSTileURLConstructor = { (x, y, zoom) in
let url = "https://aerocast.s3.amazonaws.com/radar/klix/lixtileskml/\(zoom)/\(x)/\(y).png"
return URL(string: url)
}
let tilelayer = GMSURLTileLayer(urlConstructor: urls)
tilelayer.zIndex = 100
tilelayer.map = mapView
tilelayer.opacity = 1.0
}
}
I've looked for some way to adjust the color properties of the tilelayer, but have not been able to find anything.
The issue was specific to the iOS emulator on xcode. The issue is not present on a physical iOS device. I brought up the problem to Google Maps support and they were able to replicate the problem and are looking into it.