Question

My application is crashing when I scrolling map with displaying one or more annotation. Without display annotation map is working fine.

Now I can’t understand what is problem here. Please Help Me.

Following is code that I used to display All annotation.

-(void)displayAllAnnotation
{
    NSLog(@"%d",[reminderTitle count]);
    for (int i=0 ; i<[reminderTitle count]; i++)
    {    
        double templati=[[reminderLatitude objectAtIndex:i]doubleValue];
        double templongi=[[reminderLongitude objectAtIndex:i]doubleValue];


        CLLocationCoordinate2D coord;
        coord.latitude=(CLLocationDegrees)templati;
        coord.longitude=(CLLocationDegrees)templongi;
        DDAnnotation *ann = [[[DDAnnotation alloc] initWithCoordinate:coord   addressDictionary:nil] autorelease];

        ann.title = [reminderTitle objectAtIndex:i];


        [self.mapView addAnnotation:ann];
        [ann release];

    }
}

Answer 1

You release ann object two times so your application is crashing.
remove autorelease. just write like this:

DDAnnotation *ann = [[DDAnnotation alloc] initWithCoordinate:coord   addressDictionary:nil];