ell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];  NSMutableDictionary *temperoryDictionary = [[NSMutableDictionary alloc] initWithDictionary:[self.weatherArray objectAtIndex:indexPath.row]];  NSString *imageURL = [[[temperoryDictionary valueForKey:@"weatherIconUrl"] objectAtIndex:0] valueForKey:@"value"];   [self downloadImageWithURL:[NSURL URLWithString:imageURL] completionBlock:^(BOOL succeeded, UIImage *image) {     