iphone MapView and annotationView released

Question

hi, my name is TAG. i using a mapview in my application and for each annotation view on the map i download image from webservice. the is that i'm not able to release all space take by the image download after make a research and create the annotation. also when i leave the viewcontroller who contain the mapview. i'm not able to release the space take by the zooming of map and all image download. Please a need help how to procede.. THX to all the community

Answer 1

this is my code, show where i download image for annotation view:- (MKAnnotationView *)mapView:(MKMapView *)mapView1 viewForAnnotation:(id )annotation { static NSString *viewIdentifier = @"annotationView"; annView = (MKAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:viewIdentifier];

if (annView == nil) {
    annView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"cell"] autorelease];
}

ParkPlaceMark *placemark1 =(ParkPlaceMark *)annotation;
AllPosts *obj_allpost;
UIButton *btn_pirate = [UIButton buttonWithType:UIButtonTypeCustom];
btn_pirate.frame=CGRectMake(8, 9, 40, 40);
btn_pirate.backgroundColor = [UIColor colorWithRed:0.897870104 green:0.897870104 blue:0.897870104 alpha:1.0];
[btn_pirate.layer setMasksToBounds:YES];
btn_pirate.layer.cornerRadius =6.0;
[btn_pirate addTarget:self action:@selector(thx:)  forControlEvents:UIControlEventTouchUpInside];
int tag = 0;
int count = [arr_allposts count];
for(int j=0;j<count;j++)
{
    //Post *obj_allpost = (Post *)[arr_allposts objectAtIndex:j];
    //NSString *ipath = obj_allpost.ItemTitle;
    if(placemark1.tag == j)
    {
        tag = j;
        btn_pirate.tag= tag;
        annView.tag =tag;
        obj_allpost = [arr_allposts objectAtIndex:tag];


        int serviceid = obj_allpost.ServiceId;
        if(serviceid == 0)
        {
            [annView addSubview:btn_pirate];
            annView.image = [UIImage imageNamed:@"pop_i.png"];

        }
        else
        {
            [annView addSubview:btn_pirate];
            annView.image = [UIImage imageNamed:@"map_s.png"];

        }

        UIActivityIndicatorView *indicator1=[[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(10, 10, 20, 20)];
        [indicator1 startAnimating];
        indicator1.activityIndicatorViewStyle=UIActivityIndicatorViewStyleGray;
        [btn_pirate addSubview:indicator1];
        indicator1.tag=tag+1000;
        //indicator1 = nil;
        //_thread =[[NSThread alloc] initWithTarget:self selector:@selector(download:) object:btn_pirate];
        //[_thread start];
        NSString *str1;
        if(obj_allpost.ImageURL)
        {
            str1 = [obj_allpost.ImageURL stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

        NSString *str = [@"http://dev.winitsoftware.com/PJ/getImageForApp.aspx?W=40&amp;H=40&amp;image=" stringByAppendingString:str1];
        str = [str stringByReplacingOccurrencesOfString:@"../" withString:@""];

        HttpRequest *req =[[HttpRequest alloc]init];
            [req GetRequest:str Delegate:self Tag:tag+1000 ModuleName:@"image" Button:btn_pirate ];
        [req release];
        }

        break;
    }
}


[annView addObserver:self forKeyPath:@"selected" options:NSKeyValueObservingOptionNew context:GMAP_ANNOTATION_SELECTED];

[annView setEnabled:YES];

annView.userInteractionEnabled =YES;
annView.tag = tag; //placemark.tag;
annView.canShowCallout = NO;
//CGPoint notNear = CGPointMake(10000.0,10000.0);
//annView.calloutOffset = notNear;

return annView;//[annView autorelease];

}

-(void)httpResponseReceived:(WebResponse *)response {

if(response.data)
    {
        [response.btn setBackgroundImage:[UIImage imageWithData:response.data] forState:UIControlStateNormal];
    }
else
    {
        [response.btn setBackgroundImage:[UIImage imageNamed:@"cross.png"] forState:UIControlStateNormal];
    }
UIActivityIndicatorView *indi=(UIActivityIndicatorView *)[response.btn viewWithTag:response.tag];
[indi stopAnimating];
[indi release];
response = nil;
[response release];

} ///this is the dealloc function : - (void)dealloc { for (id annotation in mapView.annotations) { [[mapView viewForAnnotation:annotation] removeObserver:self forKeyPath:@"selected"]; annotation = nil; [annotation release]; } [mapView release]; mapView.delegate = nil;

[btnListView release];
[btnViewTradeItem release];
[btnViewPost release];
[btnHome release];
[myView release];
[search release];
[annView release];
//[placemark release];
[allpost_obj release];
[imageView release];
[indicator release];
[_thread release];
[messageimage release];
//[ParkPlaceMark1 release];

btnListView=nil;
btnViewTradeItem=nil;
btnViewPost=nil;
btnHome=nil;
myView=nil;
search=nil;
annView=nil;
//placemark=nil;
allpost_obj=nil;
imageView=nil;
indicator=nil;
_thread=nil;
messageimage=nil;} but the problem is when i leave this view the capacity of space take by him (8MB) is not realease at all, so what maybe i'm doing wrong..THX