Alternative to NSData in image loading

Question

I currently have a RSS feed loading into a Navigation Controller, but I just recently added images onto the cells, I am using NSData to store the image data, but it is very laggy so this means I need a better way to store that data.

This is my code:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];
    cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: @"title"];
    NSString *textFiltered = [[feeds objectAtIndex:indexPath.row] objectForKey: @"description"];
    cell.detailTextLabel.text = [textFiltered stringByConvertingHTMLToPlainText];
    //cell.detailTextLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: @"pubDate"];
    //NSString *imageURLString = [[feeds objectAtIndex:indexPath.row] objectForKey: @"enclosure"];

    NSURL *url = feeds[indexPath.row][@"url"];
    NSData *imageData = [NSData dataWithContentsOfURL:url];
    cell.imageView.image = [UIImage imageWithData:imageData];


    return cell;
}

Any good alternatives and if so how do I use it correctly?

Answer 1

    NSURL *url=[NSURL URLWithString:urlUTF8];

    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];

    [NSURLConnection sendAsynchronousRequest:urlRequest queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
     {
         UIImage *imagemain=[UIImage imageWithData:data];
         //         CGSize size=imagemain.size;
  //compulsary you have to give resize the image.....
         UIImage *compimage=[self  resizeImage:imagemain resizeSize:CGSizeMake(45,45)];
         Cell.imgProfile.image=compimage;
         //         CGSize size1=compimage.size;
     }];
 this is perfect code for image loading in tableview cell.......

for Resizing Method

-(UIImage *) resizeImage:(UIImage *)orginalImage resizeSize:(CGSize)size
 {
CGFloat actualHeight = orginalImage.size.height;
CGFloat actualWidth = orginalImage.size.width;
//  if(actualWidth <= size.width && actualHeight<=size.height)
//  {
//      return orginalImage;
//  }
float oldRatio = actualWidth/actualHeight;
float newRatio = size.width/size.height;
if(oldRatio < newRatio)
{
    oldRatio = size.height/actualHeight;
    actualWidth = oldRatio * actualWidth;
    actualHeight = size.height;
}
else
{
    oldRatio = size.width/actualWidth;
    actualHeight = oldRatio * actualHeight;
    actualWidth = size.width;
}

CGRect rect = CGRectMake(0.0,0.0,actualWidth,actualHeight);
UIGraphicsBeginImageContext(rect.size);
[orginalImage drawInRect:rect];
orginalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return orginalImage;

}