objective c - iPhone MVC app: Where should I put the model? -

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I am very new to the development of the iPhone.

I am creating an app that has multiple views controllers There is only one model.

I need to share the model among all the controllers; So I have modeled the app within the App Delegate header file: 

  @interface MyAppDelegate (... cutting ...) @ property (non-constructive, retaining) calcomold * model;

and then synthesized accordingly.

Inside a controller, I have tried to refer to such models: 

  CalcModel * model = [[[UIApplication shared application] representative] Model];

The problem is that the compiler is not found in the '-model' protocol

That's because the representative field gives the type of protocol, not the solid MyAppDelegate type. .. then what should I put in [[UIApplication sharedApplication] representative] MyAppDelegate, so can I use model property? if so, how?

Or is this all wrong? In more detail, how do you view a model between controllers?

Many thanks for your help

Yes, just insert it I have a macro I define which makes it easy to wrap in a simple call.

Regarding a method of implementing the model structure, there are some useful hints in this article:

(We only consider ourselves single Apply the model in the form, and use KVO to listen for changes in properties.)


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