In a UINavigationController, Passing data from topViewController to it's previous ViewController, before TopViewController is popped

Question

My UINavigationController contains 3 UIViewControllers in order A -> B -> C; C is the TopViewController.

Before I pop C, I need to pass some data (that has been gathered in C) to B. How can this be done??

Give 'C' a pointer to 'B'. Often this is done using the [Delegate Pattern](https://developer.apple.com/library/ios/documentation/General/Conceptual/DevPedia-CocoaCore/Delegation.html). — i_am_jorf, Oct 10 '14 at 17:14

score 0 · Answer 1 · answered Oct 10 '14 at 17:23

0

There are multiple ways you could do this. One is to use delegate pattern. A good article on this can be found here. Also you may use NSNotifications to this. You can find more info on this here.

answered Oct 10 '14 at 17:23

Dilshan

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In my opinion, notifications is not the correct method in this instance, however delegation for sure, or using blocks. – Nick Oct 10 '14 at 17:26
Yes its not recommended and its not correct. I agree. Thats why I used the word "may". – Dilshan Oct 10 '14 at 17:27

In a UINavigationController, Passing data from topViewController to it's previous ViewController, before TopViewController is popped

1 Answers1