I did find an answer to this title and I did do a little research but I'm still not getting the flow. Here is what I want to happen:

1) click a button on the presenter view to open a modal view. 2) retrieve some value and click a button to close the modal view....sending the value to the presentor view and execute a method.

I get that this works like a callback but I still can't figure out where to put the callback stuff.

So, how exactly do I do this? A) In the presentViewController completion block, should I include the presenter view method to execute when modal view is completed?

Or: B) In the modal view's dismissViewControllerAnimated completion block, should I include the presenter view method to execute when modal view is completed?

Can somebody help me with some sample code? Or at least help me get the flow of which block to put the code in?

Thank you, P