Wait for assetForURL blocks to be completed

Question

I would like to wait this code to be executed before to continue but as these blocks are called assynchronously I don\'t know how to do???

NSURL *asseturl;
N         


        

Answer 1

The solution is here http://omegadelta.net/2011/05/10/how-to-wait-for-ios-methods-with-completion-blocks-to-finish/