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Summary:

When using the GMSMapView object from the GoogleMaps framework (installed per pods from here: https://cocoapods.org/pods/GoogleMaps) i have a strange issue when applying a custom mapstyle to the GMSMapView - the city and country labels are disappearing - this doesn't happen when i don't use any custom style for the map. (It doesn't matter which stlye attributes are set or not set it always happens for me)

Steps to reproduce:

I reproduced my issue in a Single View Application with only one ViewController where the map is constraint in Storyboard and linked to my ViewController.swift. The app looks like this:

AppDelegate:

class AppDelegate: UIResponder, UIApplicationDelegate 

 var window: UIWindow?

 let myGoogleMapsAPIKey: String = "[here goes my API-Key]"

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool 

 GMSServices.provideAPIKey(self.myGoogleMapsAPIKey)

 return true
 

 func applicationWillResignActive(_ application: UIApplication) 

 func applicationDidEnterBackground(_ application: UIApplication) 

 func applicationWillEnterForeground(_ application: UIApplication) 

 func applicationDidBecomeActive(_ application: UIApplication) 

 func applicationWillTerminate(_ application: UIApplication) 

ViewController.swift:

class ViewController: UIViewController 

 // mapView is linked from storyboard
 @IBOutlet weak var mapView: GMSMapView!

 override func viewDidLoad() 
 super.viewDidLoad()
 self.applyStyleToMap(self.mapView)
 

 func applyStyleToMap(_ map: GMSMapView) 
 do 
 if let styleURL = Bundle.main.url(forResource: "mapStyle", withExtension: "json") 
 map.mapStyle = try GMSMapStyle(contentsOfFileURL: styleURL)
 else 
 NSLog("Unable to find mapStyle.json")
 
 catch 
 NSLog("Map style failed to load")
 
 

mapStyle.json:

[
 
 "featureType": "administrative.locality",
 "elementType": "all",
 "stylers": [
 
 "visibility": "on"
 
 ]
 
]

Issue:

When zooming with a Pinch-Gesture into and out of the GMSMapView at specific zoom stages all labels are disappearing from the map with custom style. The Map then looks like this: (like mentioned this doesn't happen if no style gets applied)

Did anyone experience this is issue and can point me in the right direction? Am i missing a thing or is it a bug in the Google-Maps-iOS-SDK?

If you need further informations let me know i will provide everything you need.

Best Regards.