Reputation: 358
Depends of zoom level of MKMapView I need to redraw my custom MKAnnotationView. As far, as I understood I must to do it in next method of map controller
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
Removing and then adding annotation to MKMapView here force blinking of AnnotationView. How can I do this in a right way?
Upvotes: 2
Views: 3150
Reputation: 63707
You don't need to remove it and add it back. Just make a change on the custom annotation view and call setNeedsDisplay
. Example:
@interface AnnotationClusterView : MKAnnotationView {
@property (nonatomic, assign) int badgeNumber;
}
@implementation AnnotationClusterView
@synthesize badgeNumber;
// ...
- (void)drawRect:(CGRect)rect {
NSString *string = [NSString stringWithFormat:@"%d",self.badgeNumber];
[string drawInRect:stringRect withFont:[UIFont fontWithName:@"Helvetica-Bold" size:13.0]];
}
@end
When zoom changes, get a reference to the MKAnnotationView, set a different badgeNumber, and ask for a redraw calling [myView setNeedsDisplay];
. You can do the same for images.
Upvotes: 3