pushViewController in a UINavigationController from a different View Controller

I have a screen in my iPhone application where i have to load multiple kinds of data simultaneously. To simplify my code, I created separate view and loaded separate view controllers in them to handle each set of data. The blue rectangle on the top has a separate VC and the blue square(ish) below it has another VC that has a navigation controller. All is going well until I suddenly need to push a viewcontroller onto my stack in one VC if user taps on the view that is handled by a different VC.

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You could add a property to each "sub" view controller where you could set a UINavigationController. Set the UINavigationController from the "container" view for each "sub" view controller and use this navigation controller instance to push other view controllers.