[NSThread detachNewThreadSelector:@selector(loadPList) toTarget:self withObject:nil];

- (void) loadPList
{

    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *path = [[documentPaths lastObject] stringByAppendingPathComponent:@"test.plist"];

    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path]; // memory leak here

    NSMutableArray *annotations = [[NSMutableArray alloc]init];


    dispatch_async(dispatch_get_main_queue(), ^{


        NSMutableArray * annotationsToRemove = [ mapView.annotations mutableCopy ] ;
        [ annotationsToRemove removeObject:mapView.userLocation ] ;
        [ mapView removeAnnotations:annotationsToRemove ] ;



        if ([[NSUserDefaults standardUserDefaults] boolForKey:@"blackKey"])
        {

            NSArray *ann = [dict objectForKey:@"Black"];

            for(int i = 0; i < [ann count]; i++) {

                NSString *coordinates = [[ann objectAtIndex:i] objectForKey:@"Coordinates"];

                double realLatitude = [[[coordinates componentsSeparatedByString:@","] objectAtIndex:1] doubleValue];
                double realLongitude = [[[coordinates componentsSeparatedByString:@","] objectAtIndex:0] doubleValue];

                MyAnnotation *myAnnotation = [[MyAnnotation alloc] init];
                CLLocationCoordinate2D theCoordinate;
                theCoordinate.latitude = realLatitude;
                theCoordinate.longitude = realLongitude;

                myAnnotation.coordinate=CLLocationCoordinate2DMake(realLatitude,realLongitude);
                myAnnotation.title = [[ann objectAtIndex:i] objectForKey:@"Name"];
                myAnnotation.subtitle = [[ann objectAtIndex:i] objectForKey:@"Address"];
                myAnnotation.icon = [[ann objectAtIndex:0] objectForKey:@"Icon"];

                [mapView addAnnotation:myAnnotation];
                [annotations addObject:myAnnotation];

            }

        }


    });


}

dispatch_async(get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    [self loadPlist];
});

NSMutableArray *annotations = [[NSMutableArray alloc]init]; // Never released
NSMutableArray * annotationsToRemove = [ mapView.annotations mutableCopy ] ; // Never released
MyAnnotation *myAnnotation = [[MyAnnotation alloc] init]; // Never released

- (void) loadPList {
    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *path = [[documentPaths lastObject] stringByAppendingPathComponent:@"test.plist"];
    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path]; // memory leak here
    NSMutableArray *annotations = [[[NSMutableArray alloc] init] autorelease];
    dispatch_async(dispatch_get_main_queue(), ^{
        NSMutableArray * annotationsToRemove = [[mapView.annotations mutableCopy] autorelease];
        [annotationsToRemove removeObject:mapView.userLocation] ;
        [mapView removeAnnotations:annotationsToRemove] ;
        if ([[NSUserDefaults standardUserDefaults] boolForKey:@"blackKey"])
        {

            NSArray *ann = [dict objectForKey:@"Black"];

            for(int i = 0; i < [ann count]; i++) {

                NSString *coordinates = [[ann objectAtIndex:i] objectForKey:@"Coordinates"];

                double realLatitude = [[[coordinates componentsSeparatedByString:@","] objectAtIndex:1] doubleValue];
                double realLongitude = [[[coordinates componentsSeparatedByString:@","] objectAtIndex:0] doubleValue];

                MyAnnotation *myAnnotation = [[[MyAnnotation alloc] init] autorelease];
                CLLocationCoordinate2D theCoordinate;
                theCoordinate.latitude = realLatitude;
                theCoordinate.longitude = realLongitude;

                myAnnotation.coordinate=CLLocationCoordinate2DMake(realLatitude,realLongitude);
                myAnnotation.title = [[ann objectAtIndex:i] objectForKey:@"Name"];
                myAnnotation.subtitle = [[ann objectAtIndex:i] objectForKey:@"Address"];
                myAnnotation.icon = [[ann objectAtIndex:0] objectForKey:@"Icon"];

                [mapView addAnnotation:myAnnotation];
                [annotations addObject:myAnnotation];

            }
        }
    });
}