Question

I have a view which has a UITableView where I am lazy loading images. I have a class called ThumbDownloader where I initialize an NSURLConnection and upon finishing loading the image when connectionDidFinishLoading is called, within connectionDidFinishLoading, I make a call like this back to my main view:

[delegate appImageDidLoad:self.indexPathInTableView];

In my main view I have an array of ThumbDownloader instances. The array is named: imageDownloadsInProgress

The problem is, if I enter the view and quickly exit it before all of the images are done downloading, I get the zombie:

 -[myApp appImageDidLoad:]: message sent to deallocated instance 0xa499030

I have tried a bunch of ways to release the ThumbDownloader instances in dealloc and such, but nothing seems to work.

Here is where I set up the instance and add it to the array:

- (void)startIconDownload:(Product *)product forIndexPath:(NSIndexPath *)indexPath
{
    ThumbDownloader *thumbDownloader = [imageDownloadsInProgress objectForKey:indexPath];
    if (thumbDownloader == nil) 
    {
        thumbDownloader = [[ThumbDownloader alloc] init];
        thumbDownloader.product = product;
        thumbDownloader.imageSizeWidth = 87;
        thumbDownloader.imageSizeHeight = 87;
        thumbDownloader.indexPathInTableView = indexPath;
        thumbDownloader.delegate = self;
        [imageDownloadsInProgress setObject:thumbDownloader forKey:indexPath];
        [thumbDownloader startDownload];
        [thumbDownloader release];   
    }
}

Answer 1

Make sure you clear the delegate on the NSURLConnection.