mapkit

I'm implementing a map feature in my app where I allow the user to set their current location by panning around. All this time, I want to have an MKAnnotation in the centerCoordinate . So what I want to do is keep track of when the map's centerCoordinate changes and change the annotation's coordinate correctly. The behaviour would be similar to that of Uber , Hailo and others. I tried a time based implementation where every 0.00001s the centerCoordinate would be checked and the annotation would also be moved. But if the map isn't flicked gently, the annotation jumps from one place to another

Is it possible to replace the pin icon of an annotation by a dynamic text label? Maybe using css, or dynamically creating an image? For example a label is done with CSS on Google Maps API with JavaScript. Yes, it's possible. In iOS MapKit, you'll need to implement the viewForAnnotation delegate method and return an MKAnnotationView with a UILabel added to it. For example: -(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation { if ([annotation isKindOfClass:[MKUserLocation class]]) return nil; static NSString *reuseId = @"reuseid"; MKAnnotationView *av

Can anyone confirm that setRegion "snaps" to predefined zoom levels and whether or not this behavior is as designed (although undocumented) or a known bug? Specifically, it appears that setRegion snaps to the same zoom levels that correspond to the zoom levels used when the user double-taps the map. I'm trying to restore a previously saved region but this behavior makes it impossible if the saved region was set via a pinch zoom and not a double-tap zoom. A big clue to me that things are broken on the mapkit side is what occurs if I call regionThatFits on the map's current region. It should

Can I create an MKAnnotation , or is it read only? I have coordinates, but I am not finding it easy to manually create an MKAnnotation with using setCoordinate . Ideas? MKAnnotation is a protocol. So you need to write your own annotation object that implements this protocol. So your MyAnnotation header looks like: @interface MyAnnotation : NSObject<MKAnnotation> { CLLocationCoordinate2D coordinate; } @property (nonatomic, readonly) CLLocationCoordinate2D coordinate; // add an init method so you can set the coordinate property on startup - (id) initWithCoordinate:(CLLocationCoordinate2D)coord;

I have a MKMapView . Sometimes after my view controller is dismissed, I'll get a EXC_BAD_ACCESS . I turned on NSSZombies and it looks like the MKMapView 's delegate — my view controller! — is being called, despite both the MKMapView and UIViewController subclass being freed. I've checked, and my memory management is correct. What's going on? This is because of the way MKMapView works. There's an operation pending, so MapKit is retaining the MKMapView and it hasn't actually been deallocated yet. That isn't itself a problem. The problem is that it's still sending messages to your delegate. The