Table View with Images, slow load and scroll

Question

I tried impletmenting about 30 tutorials today and just cant get anything to work.

My problem is that i load my information via a JSON file, add the data to a NSMuta

Answer 1

You should use asynchronous image retrieval provided by UIImageView categories found in AFNetworking or SDWebImage. These categories:

• are incredibly easy to use (rather than using the UIImageView method setImage, instead use one of the categories' setImageWithURL methods);

• provide asynchronous image retrieval;

• cache the downloaded images with NSCache, to make sure you don't have to retrieve images that you just downloaded;

• ensure that your UI cannot get backlogged downloading images for cells that have scrolled off screen; and

• leverage operation queues to constrain the degree of concurrency (rather than using GCD global queues that can result in timeout failures).