Geofencing events not working on simulator (Xamarin.ios)

Question

I have a problem with firing geofence events on Xamarin.ios . I remember I used to have it working using the same methods in the past. Right now it doesn't work somehow. I'm using the following code to start monitoring:

CLLocationManager locMan = new CLLocationManager();
locMan.RequestWhenInUseAuthorization();
locMan.RequestAlwaysAuthorization();
locMan.RegionEntered += (sender, e) => { Console.WriteLine("You've entered the region"); };

locMan.RegionLeft += (sender, e) => { Console.WriteLine("You've left the region"); };

CLCircularRegion aRegion2 = new CLCircularRegion(new CLLocationCoordinate2D(30.432, 97.7360), 100, "apple test");
locMan.StartMonitoring(aRegion2);

And that's one demo project that I'm trying to test the geofence events on but not working : https://github.com/aproram/Xamarin_ios_geofence_issue_demo

I'm testing the location change from the simulator menu (Debug->locaiton->custom location). Sometimes I get this message in the console output while changing the location:

[Client] #Spi, Interrupted

Development environment:
Visual Studio v8.1
Xamarin.iOS Version: 12.10.0.153
xCode 10.1
Simulator iphone 6s (ios 12.1)

One thing to mention, I tried testing geofencing with an xCode SWIFT project and the events were fired. So I'm not sure if the problem is with my C# code or VS..

Answer 1

stack overflow post

I don't know if this is the issue you are running into, but you need to make sure you have all three of the description keys in your info.plist for anything > iOS 11. That may be why it used to work, but doesn't work now.

The keys are as follows:

NSLocationAlwaysAndWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
NSLocationWhenInUseUsageDescription

There is a WWDC video talking about the changes in CoreLocation coming in iOS 13 so this may change yet again (I don't remember the details of that offhand). iOS 13 CoreLocation Video