How do I change draggable state of AnnotationView at specific moment?

I want change draggable state 开发者_如何学编程from YES to NO when user pressed the button.

How can I do ?

view.draggable = NO;

If you need to get a reference to your annotationView, you can do so with MKMapView viewForAnnotation::

MKAnnotationView *view = [self.map viewForAnnotation:self.annotation];
view.draggable = NO;