public override void ViewDidLoad()
{
base.ViewDidLoad();
// you can set the update threshold and accuracy if you want:
//locationManager.DistanceFilter = 10d; // move ten meters before updating
//locationManager.HeadingFilter = 3d; // move 3 degrees before updating
// you can also set the desired accuracy:
locationManager.DesiredAccuracy = 1000; // 1000 meters/1 kilometer
// you can also use presets, which simply evalute to a double value:
//locationManager.DesiredAccuracy = CLLocation.AccuracyNearestTenMeters;
locationManager.Delegate = this;
locationManager.RequestWhenInUseAuthorization();
if (CLLocationManager.LocationServicesEnabled)
{
locationManager.StartUpdatingLocation();
}
if (CLLocationManager.HeadingAvailable)
{
locationManager.StartUpdatingHeading();
}
}
void requestLocationAsync(bool askPermissionIfNecessary)
{
// is not authorized?
if (CoreLocation.CLLocationManager.Status == CLAuthorizationStatus.Restricted ||
CoreLocation.CLLocationManager.Status == CLAuthorizationStatus.Denied)
{
Task.Run(() =>
{
Location = null; // location is not known
LocationServicesStatus = LocationServicesStatusEnum.NotAuthorized;
FailureInfo = "Not authorized to use location services";
fireEvents();
});
return;
}
// initialize
initLocationManager();
// request permission
if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0) == true &&
CoreLocation.CLLocationManager.Status == CLAuthorizationStatus.NotDetermined)
{
if (askPermissionIfNecessary == false)
{
return; // don't do anything if the caller doesn't want to ask for permission
}
locationManager.AuthorizationChanged += (s, e) =>
{
if (e.Status == CLAuthorizationStatus.NotDetermined)
{
return; // in progress
}
if (e.Status == CLAuthorizationStatus.Authorized || e.Status == CLAuthorizationStatus.AuthorizedAlways || e.Status == CLAuthorizationStatus.AuthorizedWhenInUse)
{
LocationServicesStatus = LocationServicesStatusEnum.Ok;
this.tryCheckingNow();
}
else
{
Location = null; // location is not known
LocationServicesStatus = LocationServicesStatusEnum.NotAuthorized;
FailureInfo = "Permission to use use location services not given";
fireEvents();
}
};
locationManager.RequestWhenInUseAuthorization();
return;
}
// check location
this.tryCheckingNow();
}
public EnableLocation()
{
ViewController vc = new ViewController("RestaurantMap");
Maps map = vc.getMap();
CoreLocation.CLLocationManager locationManager = new CoreLocation.CLLocationManager();
locationManager.RequestWhenInUseAuthorization();
map.IsShowingUser = true;
// add an annotation
/*map.AddAnnotations (new MKPointAnnotation (){
* Title="MyAnnotation",
* Coordinate = new CoreLocation.CLLocationCoordinate2D(42.364260, -71.120824)
* });*/
}
//
// This method is invoked when the application has loaded and is ready to run. In this
// method you should instantiate the window, load the UI into it and then make the window
// visible.
//
// You have 17 seconds to return from this method, or iOS will terminate your application.
//
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
// Member variable in the class
// Save a reference to the CLLocationManager so that it stays in scope
// Some method in the class
// Request geoloation authorization
locationManager = new CoreLocation.CLLocationManager();
if (locationManager.RespondsToSelector (new ObjCRuntime.Selector("requestWhenInUseAuthorization")))
{
locationManager.RequestWhenInUseAuthorization ();
}
global::Xamarin.Forms.Forms.Init();
LoadApplication(new App());
return base.FinishedLaunching(app, options);
}
