NSLog not called within block - ios

Question

my replaceObjectatIndex:withObject: is not being called when I put it inside a block. I know this because when I NSLog in the outer block the value doesn't change. why is the method inside the inner block not being called while the method in the outer block does? what's the difference?
this is the code:
if (cell.selected) {
[[SDImageCache sharedImageCache] queryDiskCacheForKey:imageID
done:^(UIImage *image, SDImageCacheType cacheType)
{
// image is not nil if image was found
if (image == nil) {
//image is not found
[SDWebImageDownloader.sharedDownloader downloadImageWithURL:[NSURL URLWithString:link]
options:0
progress:^(NSInteger receivedSize, NSInteger expectedSize)
{
// progression tracking code
}
completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished)
{
if (image && finished)
{
// image is finished being downloaded
// resize image
UIImage *resizedImage = [self imageWithImage:image forRowAtIndexPath:indexPath];
// store resized image in cache
[[SDImageCache sharedImageCache] storeImage:resizedImage forKey:imageID];
//set image view to resized image
[textCell.testImage setImage:resizedImage];
[self.heightArray replaceObjectAtIndex:indexPath.row
withObject:[NSNumber numberWithFloat:image.size.height]];
}
//delete original sized image
image = nil;
}];
} else {
//image is found
[textCell.testImage setImage:image];
NSLog(#"image found %#", [self.heightArray objectAtIndex:indexPath.row]);
}
}];
} else {
//cell is not selected
textCell.testImage.image = nil;
}
By the way, the setImage: method works perfectly but not replaceObjectatIndex:withObject:

Answer 1

I don't know what you are doing but I found an issue in your code: you are using the image even after you set it to nil.
Correction:
//delete original sized image -
//??image = nil;
[self.heightArray replaceObjectAtIndex:indexPath.row
withObject:[NSNumber numberWithFloat:image.size.height]];
image = nil;