Show images asynchronouly in UITableView from server in iPhone

Question

When I try to fetch the images in UITableView using NSURL
UIImage image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://mysite.com/mobile/abc.jpg]]];
my application get freezes until the images loaded. Also when I scroll the table it get images from the server again and scroll get stuck for some time.
I know this is happening because of downloading images synchronously from server.
Is there any solution so that I can download the image asynchronously from server and store it locally or in cache so that when table scrolls it did not get images again from server.

Thanks

Answer 1

Check out EGOImageLoading by enormego. Works just like UIImage (and caches images) but lets you load from HTTP asynchronously.

Answer 2

You can create your own class which leverages NSURLConnection and it's various Asynchronous methods to load your images in the background and then have a callback to display it in the cell.

However, there are some excellent libraries which do exactly what you've described. HJCache is one i've used and recommend for this sole purpose