无法使用elm缩放谷歌地图iOS

Question

我想使用pinch来放大/缩小iOS。我的地图代码如下：

continentalUsMapOptions : GoogleMaps.CreateMapOptions    
continentalUsMapOptions =    
  { center = Just usaCenterLatLng    
  , disableDefaultUI = Just True    
  , mapTypeControlPosition = Nothing    
  , mapTypeId = Nothing      
  , maxZoom = Just 6    
  , minZoom = Just 2    
  , rotateControlPosition = Nothing    
  , scrollWheel = Just False    
  , signInControl = Just False    
  , streetViewControlPosition = Nothing    
  , styles = List.map Style.toJson mapStyles    
  , zoomGestures = Just True    
  , zoomControlPosition = Nothing    
  }    

不幸的是，zoomGestures根本不起作用。链接到页面是：https://sre.com