now there’s just one more problem…. the big one: how do you make the class you built represent the interface you built?

the answer is, you tell interface builder who the owner is. (clicking on file’s owner(that’s your controller)) when you select your class in the Identity Inspector for the file’s owner, you’re telling it that your controller is a holder for the UIView based objects.

the next problem is which objects in your class are loaded with which interface objects?

that’s where drag-and-connect comes in. You defined IBOutlets in your header. Now, by dragging those IBOutlets(which now appear in Interface builder) directly onto your interface controls you are telling them what your code is referencing.

So when you call initWithNibName: from your class (inherited from UIViewController) it creates an instance of your class with all your IBOutlets filled in from whatever you dragged them on.

Note: the “view” IBOutlet is inherited from UIViewController.

For making apps change when they are upgraded (adding features and removing ads) a single controller class can be initialized with multiple nibs. one for free and one for paid app, without changing and code except the nib name. could also use such techniques to offer selectable button layouts… simply create a new nib for an old program, drag the IBoutlets to new interface elements, and change the nibname loaded in code, the rest of the code would stay identicle. ;p

i hope any of that helps =)

Amit

I was wondering if I can put the NSMutableArray in Fruit.m file instead of putting it in the Delegate file? That way I would know what I have in Fruit object.

Thanks,
Jeno

Thanks for such a wonderful tutorial. It really help me a lot in my learning!

1 thing that I don’t understand:
Why do we need to create 2 instances of the same object (View2ViewController)

In RootViewController.h file:
View2ViewController *view2ViewController;

In RootViewController.m file:
View2ViewController *view2 = [[View2ViewController alloc] …

Thannks,
Jeno

this was exactly what we needed for our iPad app.

Thanks a lot.

All your tutorials look great, however they seem old when using iOS4,
Things like cell setText are deprecated now, and even more the app i write according to your howto/tutorial crashes when going to view2.

Could you either way or fix these tutorials or write new up to date ones, because following yours when using iOS4 is very frustrating.

other then that, great stuff man.

error: There is no SDK with the name or path ‘iphoneos2.1′

I’m completely new to this so I’ve got absolutely no idea where to start looking to figure out where I’ve gone wrong..

What mine’s doing now though, is not actually loading the program. The code compiles and the iPhone simulator starts up. But when I click on the icon, it starts, nothing happens, then it return to the home screen.

Cheers