UITabBarController never calls initWithNibName on individual tabs?

Is it true that UITabBarController never calls initWithNibName on its child views (individual tabs)? Or have I just set my app up in a really screwed-up way?

My MainWindow.xib looks like this in interface builder: tab bar in interface builder http://web.mit.edu/keone/Public/tabbar.png

Note that the Window is completely blank while all the action happens in the Tab Bar Controller.

My app delegate calls [window addSubview:tabBarController.view] in application:did开发者_运维知识库FinishLaunchingWithOptions and once that happens we're off to the races!

But when I put breakpoints on the init, initWithNibName:, and initWithNibName:bundle: methods in any of my individual controllers (which are listed in Interface Builder as children of the tabs, as the image above shows), nothing catches.

Thanks in advance!

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It doesn't call initWithNibName:, they call initWithCoder: -- initWithNibName: is only called when you programmatically instantiate a class and hand it a xib file to define its subviews from.

(Updated: I remembered wrong, initWithNibName: is never called unless one makes the call oneself.)