There are two ways of detecting user interaction with your annotation view. The common technique is to define a callout (that standard little popover bubble that you see when you tap on a pin in a typical maps app) for your MKAnnotationView. And you create the annotation view for your annotation in the standard viewForAnnotation … Read more
Despite you’re casting NSMutableSet to NSArray, that simple casting won’t make NSSet class respond to NSArray‘s messages. You have to fill an actual NSArray with the elements of the NSSet like this: NSArray *array = [theNsSet allObjects];
You have to override CLLocationManager.didUpdateLocations (part of CLLocationManagerDelegate) to get notified when the location manager retrieves the current location: func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { if let location = locations.last{ let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude) let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01)) self.map.setRegion(region, animated: true) } } NOTE: … Read more
After a lot of playing around and testing different ideas, some of which were mentioned here, the final solution that worked for me was as follows. Instead of creating new MKMapView’s as needed in the app, I added an mkMapView property to my AppDelegate and only created it when needed. Once it has been created, … Read more
It looks like you’re using an MKPolygon even though you’re only drawing a single point, with the same latitude and longitude. I think it would be better to use an MKCircle for a single point. func drawLocation(_ loc: CLLocation) { let center = CLLocationCoordinate2D(latitude: loc.coordinate.latitude, longitude: loc.coordinate.longitude) let circle = MKCircle(center: center, radius: 4) DispatchQueue.main.async(execute: … Read more
You can use a UILongPressGestureRecognizer for this. Wherever you create or initialize the mapview, first attach the recognizer to it: UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)]; lpgr.minimumPressDuration = 2.0; //user needs to press for 2 seconds [self.mapView addGestureRecognizer:lpgr]; [lpgr release]; Then in the gesture handler: – (void)handleLongPress:(UIGestureRecognizer *)gestureRecognizer { if (gestureRecognizer.state != UIGestureRecognizerStateBegan) return; … Read more
Instead of using the -mapView:viewForAnnotation: method, just put the code for an MKPointAnnotation into your -viewDidLoad method. It won’t animate the drop, but it is very easy. // Place a single pin MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init]; [annotation setCoordinate:centerCoordinate]; [annotation setTitle:@”Title”]; //You can set the subtitle too [self.mapView addAnnotation:annotation]; Swift version: let annotation = … Read more
Try a custom overlay. Add this in viewDidLoad: MKCircle *circle = [MKCircle circleWithCenterCoordinate:userLocation.coordinate radius:1000]; [map addOverlay:circle]; userLocation can be obtained by storing the MKUserLocationAnnotation as a property. Then, to actually draw the circle, put this in the map view’s delegate: – (MKOverlayRenderer *)mapView:(MKMapView *)map viewForOverlay:(id <MKOverlay>)overlay { MKCircleRenderer *circleView = [[MKCircleRenderer alloc] initWithOverlay:overlay]; circleView.strokeColor = … Read more
When you want to use your own image for an annotation view, you should create an MKAnnotationView instead of an MKPinAnnotationView. MKPinAnnotationView is a subclass of MKAnnotationView so it has an image property but it generally overrides that and draws a pin image (that’s what it’s for). So change the code to: -(MKAnnotationView *)mapView:(MKMapView *)mV … Read more
You have to register for KVO notifications of userLocation.location property of MKMapView. To do this, put this code in viewDidLoad: of your ViewController or anywhere in the place where your map view is initialized. [self.mapView.userLocation addObserver:self forKeyPath:@”location” options:(NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld) context:NULL]; Then implement this method to receive KVO notifications – (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context … Read more