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Who is responsible for instantiating MainViewController in iPhone NavBar example

I am researching NavBar example from iPhone dev center.

Specifically, I'm trying to figure out where the MainViewController object is instantiated and I just can't seem to find where this is going.

The only references to the MainViewController class are in the AppDelegate, where there is a forward declaration and #import. However, deleting these sentences does not affect the program at all.

The object was probably created in the nib file, but again, I can't find it.

I really like the Xcode IDE. However, I don't like that there are several different places where objects can be created / linked, making it very difficult to understand another user's code.

Any help would be appreciated.

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If you look at the MainWIndow.xib file and click the disclosure triangle next to Navigation Controller, you will see an instance of MainViewController. This was created by dragging and dropping a View Controller object from the library and then modifying its class.



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