What I'm trying to accomplish is to update collections of MyAnnotations
already added in MapView:
Dictionary<long, MyAnnotation> _annotations;
private void OnUpdate(Dictionary<uint, MyObject> updatedObjects)
{
// Add or Update annotations on map
foreach (var pair in updatedObjects)
{
uint id = pair.Key;
MyObject obj = pair.Value;
double lat = obj.Latitude;
double lon = obj.Longitude;
if (_annotations.ContainsKey(key)) // Update existing objects
{
_annotations[id].Coordinate = new CLLocationCoordinate2D(lat, lon);
_annotations[id].Obj = obj;
}
else // Add new object to map
{
var annotation = new MyAnnotation(new
CLLocationCoordinate2D(lat, lon), obj);
_annotations.Add(id, annotation);
InvokeOnMainThread(() => MapView.AddAnnotation(annotation));
}
}
}
but annotations does not get updates!!!
Does MapView receive KVO notifications automaticly when
MKAnnotation.Coordinate property has been changed and what is the
AddAnnotationObject methode for?
Falowed by this
thread<http://monotouch.2284126.n4.nabble.com/setCoordinate-binding-td3799997.html>
(
http://monotouch.2284126.n4.nabble.com/setCoordinate-binding-td3799997.html)
made my annotation (but not help - annotation did not change coordinates):
protected class MapAnnotation : MKAnnotation
{
private CLLocationCoordinate2D _coordinate;
public MapAnnotation(CLLocationCoordinate2D coordinate,
MyObject obj)
{
_coordinate = coordinate;
Obj = obj;
}
public override sealed CLLocationCoordinate2D Coordinate
{
get { return _coordinate; }
set
{
WillChangeValue("coordinate"); // supose to triger
MapView KVO
_coordinate = value;
DidChangeValue("coordinate"); // supose to triger
MapView KVO
}
}
public override string Title
{
get { return Obj.MyTitle; }
}
public override string Subtitle
{
get { return Obj.MySubtitle; }
}
public Object Obj { get; set; }
}
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