I've been keep track of data though the appDelegate.

James, you are a true asset to the development community! There are so many aspects of development with IB that is not adequately covered by any current books or Apple documentation. Thank you!!

It is a good point of view. What you did was wrong if we talk about MVC patterns, but you explained why.

I think for small application, that would not be a big impact; and definitely I would use without worry about it.

Another time, great tutorial.

Thank you

You got it right, James. As a C++ as well, I find very annoying ObjC doesn't crash when using unallocated objects, its incredibly stupid.

And they say it's "true object oriented":

* If you have a Java/C++ car engine without a cooling system, the engine will blow away because there is no cooling system.

* If you have an ObjC car engine without a cooling system, it will start... But it may do nothing... Perhaps! Who knows...? ...Does anybody?

If we take into account that object oriented programming is a take into trying to make programming more "human readable"... What is the most human readable behavior you would expect from a car without a cooling system?

Objective-C is full of non-sense.

Hi James,

Thanks for this tutorial. Like you I have been looking at the Stanford lectures (no 7 in particular). I was suprised when Evan skipped over what I felt is one of the most fundamental points of Nav controllers (passing data up and down the stack) - especially given his brilliant teaching style for everything else.

Do you know of any decent tutorials which cover the "right" way of passing data both up and down a stack of view controllers?

Im hoping you might have already produced one...but that may be wishful thinking ;-)