what is synchronous and asynchronous in iphone and iPad?

Question

What is synchronous and asynchronous in ios ? I am new in objective c. Which one i should use in my code while i am getting data from server. So please help me.

Thanks in advance.

Answer 1

You should always use asynchronous loading of network requests.

Asynchronous never block the main thread waiting for a network response.

Asynchronous can be either synchronous on a separate thread, or scheduled in the run loop of any thread.

Synchronous blocks main thread until they complete request.

For Demo code or turorial have a look into this link Asynchronous web service client using NSURLConnection and SBJSON