Always error and white screen when using the Vector base map on 'ProMax' iPhone.

[ZhouYi]

My dev device is an iPhone 15 ProMax with iOS 26. And the version for ArcGIS Swift SDK is 100.15.6.

If I create a map with this code:

AGSMap(basemapType: "StreetsVector", latitude: 42, longitude: -73, levelOfDetail: 5)

An error always happens, and the map view will be white. Here is the error message:

Printing description of err:

▿ Optional<Error>

  - some : Error Domain=com.esri.arcgis.runtime.error Code=18 "Internal error." UserInfo={NSLocalizedFailureReason=, NSLocalizedDescription=Internal error., Additional Message=}

Printing description of $R0:

Internal error.

But if using the basemap without vector, such as this:

AGSMap(basemapType: "Streets", latitude: 42, longitude: -73, levelOfDetail: 5)

The map can display correctly without any error.

Another information is I tried on other real deives with the same code, here is the result:

iPhone 16  --> Work

iPhone 17 Pro Max --> Error

iPad mini 5 --> Error

iPhone 16 Pro --> Work

iPhone SE 2--> Work

If anyone encounters a problem similar to mine or has some idea about my problem, we can discuss it together. Thank you for being so helpful~

[Nicholas-Furness]

Hi. That constructor is marked as deprecated. You should use this instead, and set the Map's initialViewpoint or the MapView's viewpoint (see this tutorial). You'll need to convert your zoom level 5 to a scale value (see this tool).

Please let us know if you still see the issue with that constructor.

[ZhouYi]

Thanks for your help!

I will try it and provide more information.

[ZhouYi]

Hi Nicholas, Thanks for your help. Your solution can help me to fix the issue.

But for our production environment, we  never used an apikey. So that I have 2 question about this issue.

1.Is using apikey and this constructor the most populate? 

2. Why this issue happend? (I guess these 2 constructor request different basemap url, does it correct?)

Thanks~