Q:

how to handle non responsive UI while downloading from NSURL

after looking at this question, I do not know how to handle non responsive UI while writing a large pdf file (on 3G connection let's say) from a remote server to the documents directory, is there way to solve this issue ?

A:

Either use Blocks and Grand Central Dispatch,an NSOperation or an asynchronous NSURLConnection request
All are well explained in the Apple docs.

