iPhone - calling a method from the top view controller

I have 3 viewController classes, A, B and C.

From class A, I push and present class B and then from class B I push and present class C. All classes have delegate protocols defined, so

• b.delegate = a
• c.delegate = b

Now I am inside class C, but I need to run a method from class A.

What is the best way to call that method? I mean the best practice.

I can imagine declaring this on B

- (BOOL) myMethodOnA {
// this method on B will run the method on A and return it to C
   return [delegate myMethodOnA];
}

but this sounds to me like a bad soluti开发者_StackOverflow中文版on.

Any suggestions?

thanks.

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I might miss something obvious but shouldn't this work?

[c.delegate.delegate myMethodOnA]

Also get into the habit of using accessors (make sure you don't take ownership of delegates). ARC makes this so much better.

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Depends on what you want to run on class A.

One easy option is to Observe for a notification in class A and post the notification from class C

Refer: http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSNotificationCenter_Class/Reference/Reference.html