Question

I would like some opinion, example and code on how everyone dose this..

So far I have been getting on fine using protocols and delegates for passing information back up through the navigaion controller from view to view.

However just recently I have had to pass some data across multiple views on the controller stack and just cannot figure out how to achive this with delegates and protocols.. I have asked some other question that have helped me under stand alot about what im trying to do but I want to come up with a application wide solution instead of several hashed together ideas that only just do what I need..

Basicly what I’m looking to do is is this

Navigation stack
- First View
-- second View
--- Third View - current view.

Pass data from Third to first view is the goal. I know how to pop to the first view controller.. I just don’t know how to get information to it over that distance… The majour thing holding me back atm is that I cannot declare the delegate in the First View for the Third View delegate protocol with out the application falling over.

Answer 1

This how to do it if your delegate is defined in the Third View,

In your third view:

 YourFirstViewController *fvc = [self.navigationController.viewControllers objectAtIndex:0];
    self.delegate = fvc;
    [self.delegate yourMethodHere];

make sure your firstviewcontroller conforms to the protocol

<thirdViewDelegate>

and import third view in first view.h