Objective-C Blocks and variable scope

Question

I would like to set the value of an NSData object within my block. Can someone let me know what I have done wrong here?

// Data
__block NSData *         


        

Answer 1

Because the block runs asynchronously, after the rest of your method. Either rewrite your calling code to work with the asynchronous loading, or find a way to perform the block's work synchronously. I don't know what ZSURLConnection is, but check to see if it has a version of the "perform..." method that doesn't run in the background.