public async Task <Location> GetLocationAsync(GeolocationRequest request, CancellationToken cancellationToken)
{
_ = request ?? throw new ArgumentNullException(nameof(request));
if (!CLLocationManager.LocationServicesEnabled)
{
throw new FeatureNotEnabledException("Location services are not enabled on device.");
}
await Permissions.EnsureGrantedAsync <Permissions.LocationWhenInUse>();
// the location manager requires an active run loop
// so just use the main loop
var manager = MainThread.InvokeOnMainThread(() => new CLLocationManager());
var tcs = new TaskCompletionSource <CLLocation>(manager);
var listener = new SingleLocationListener();
listener.LocationHandler += HandleLocation;
cancellationToken = Utils.TimeoutToken(cancellationToken, request.Timeout);
cancellationToken.Register(Cancel);
manager.DesiredAccuracy = request.PlatformDesiredAccuracy;
manager.Delegate = listener;
#if __IOS__
// we're only listening for a single update
manager.PausesLocationUpdatesAutomatically = false;
#endif
manager.StartUpdatingLocation();
var clLocation = await tcs.Task;
return(clLocation?.ToLocation());
void HandleLocation(CLLocation location)
{
manager.StopUpdatingLocation();
tcs.TrySetResult(location);
}
void Cancel()
{
manager.StopUpdatingLocation();
tcs.TrySetResult(null);
}
}
public async Task <Location> GetLocationAsync(GeolocationRequest request, CancellationToken cancellationToken)
{
_ = request ?? throw new ArgumentNullException(nameof(request));
if (!CLLocationManager.LocationServicesEnabled)
{
throw new FeatureNotEnabledException("Location services are not enabled on device.");
}
await Permissions.EnsureGrantedAsync <Permissions.LocationWhenInUse>();
// the location manager requires an active run loop
// so just use the main loop
var manager = MainThread.InvokeOnMainThread(() => new CLLocationManager());
var tcs = new TaskCompletionSource <CLLocation>(manager);
var listener = new SingleLocationListener();
listener.LocationHandler += HandleLocation;
cancellationToken = Utils.TimeoutToken(cancellationToken, request.Timeout);
cancellationToken.Register(Cancel);
manager.DesiredAccuracy = request.PlatformDesiredAccuracy;
manager.Delegate = listener;
#if __IOS__
// we're only listening for a single update
#pragma warning disable CA1416 // https://github.com/xamarin/xamarin-macios/issues/14619
manager.PausesLocationUpdatesAutomatically = false;
#pragma warning restore CA1416
#endif
manager.StartUpdatingLocation();
var reducedAccuracy = false;
#if __IOS__
if (OperatingSystem.IsIOSVersionAtLeast(14, 0))
{
if (request.RequestFullAccuracy && manager.AccuracyAuthorization == CLAccuracyAuthorization.ReducedAccuracy)
{
await manager.RequestTemporaryFullAccuracyAuthorizationAsync("TemporaryFullAccuracyUsageDescription");
}
reducedAccuracy = manager.AccuracyAuthorization == CLAccuracyAuthorization.ReducedAccuracy;
}
#endif
var clLocation = await tcs.Task;
return(clLocation?.ToLocation(reducedAccuracy));
void HandleLocation(CLLocation location)
{
manager.StopUpdatingLocation();
tcs.TrySetResult(location);
}
void Cancel()
{
manager.StopUpdatingLocation();
tcs.TrySetResult(null);
}
}