Comments on: UINavigationController Tricks

By: Nita Grace

Nita Grace — Fri, 28 May 2010 06:29:54 +0000

You’ve done it once again. Superb writing.

By: Ernest

Ernest — Sat, 20 Feb 2010 21:33:34 +0000

Hi Brad, how did you manage to nest the functionality of the UINavigationController inside of another view? I’m having some trouble with this; some sample code would be greatly appreciated

By: Brad

Brad — Tue, 11 Aug 2009 19:04:33 +0000

Jonathan – thanks for the idea! And yeah, I can see where that would be convenient. The only thing I don’t love about it is the tight coupling this introduces – now all your subviews know about each other and about the implementation of the app delegate. I’m more comfortable passing the enclosing view controller to the responsible subview and telling it “notify this thing when you’re done”.

But, as you say, it’s a matter of style.

By: Jonathan

Jonathan — Tue, 11 Aug 2009 16:52:53 +0000

What about something like this from your inner nav controller:

MyAppDelegate *delegate = (MyAppDelegate*)[[UIApplication sharedApplication] delegate];
[delegate.outerNavController pushViewController:nextStepViewController animated:YES];

Where MyAppDelegate has a member variable outerNavController that is a UINavigationController or your own customer subclass of course.

I guess it’s a matter of style; I like to have pointers to the primary views of my application from my app delegate class so I can make these kinds of transitions from anywhere to anywhere. I don’t do this for secondary views that should only be accessible from the primary views.