Question

I am getting problem while removing annotations from MKMapView. I have already search for same and found so many answers but couldn’t find satisfactory ans. Below is my code summary:

I have created my custom class as MyMapViewPoints and created one function as

- initWithZTitle:(NSString *)title andCoordinate:(CLLocationCoordinate2D)location

Whenever I want to add annotation I simply create one object of MyMapViewPoints and

[mapView addAnnotation:newAnnotation];

When I want to remove all mapview points (annotations) I execute following code:

for (int i =0; i < [mapView.annotations count]; i++) 
{ 
    if ([[mapView.annotations objectAtIndex:i] isKindOfClass:[MyMapViewPoints class]]) 
    {    
        MyMapViewPoints *obj = (MyMapViewPoints *)[mapView.annotations objectAtIndex:i];
        if(obj.type != 1)
            [mapView removeAnnotation:[mapView.annotations objectAtIndex:i]];
    } 
}

But some of the annotation points remains on map. If I have added six points and tried to remove all using above code 2 mapview points (annotations) retains. Any ideas?

Answer 1

just try this code…

NSArray *existingpoints = mapView.annotations;
if ([existingpoints count] > 0)
    [mapView removeAnnotations:existingpoints];

UPDATE:

Also try this code…

for (int i =0; i < [mapView.annotations count]; i++) { 
    if ([[mapView.annotations objectAtIndex:i] isKindOfClass:[MyMapViewPoints class]]) {                      
         [mapView removeAnnotation:[mapView.annotations objectAtIndex:i]]; 
       } 
}