Offline Map in Xamarin Forms (iOS) is blank whereas in UWP it works fine

KrishnaShinde

I am running a Xamarin Forms application supporting both UWP and iOS. We have a TPK file on the device to be used in offline mode. And it works perfectly fine in UWP. I can see the map, interact with it. But in iOS, I get a blank map. The map initialization code is the same for both platforms.

I use different code to load the map based on the Device OS platform

 

 

 

// Using following code to load map on iPad. The tpk file is stored in Files app on iPad and we are allowing user to select the tpk file 
var result = await FilePicker.PickAsync(); 
var mapPath = result.FullPath; 
var tileCache = new TileCache(mapPackagePath); ArcGISTiledLayer tileLayer = new ArcGISTiledLayer(tileCache); 
Map = new Map(new Basemap(tileLayer)); 

// Using following code to load on Windows (UWP). On Windows, we are just providing the path where tpk file is located and it works fine. 
var mapPackageFolder = @"C:\Temp\Map Files"; 
var mapPackageFile = @"Topo.tpk"; 
var mapPackagePath = System.IO.Path.Combine(mapPackageFolder,mapPackageFile); var tileCache = new TileCache(mapPackagePath); 
ArcGISTiledLayer tileLayer = new ArcGISTiledLayer(tileCache); 
Map = new Map(new Basemap(tileLayer)); 

 

 

 

Following is the result in UWP:

Working sample in UWP 

 

Following is the result in iOS:

Sample in iOS 

 

Can someone help me with this?

Thanks in advance.

 

 

SomeGISGuy

Try loading the layer explicitly and see if an error is thrown (and what that error is):

try {
  await tileLayer.LoadAsync();
}
catch(System.Exception ex) {
  // Inspect ex here
}

 

I'm guessing the issue is your app might not be able to directly read from the path you're specifying.