iOS: Is is possible to make a UINavigationBar taller and "push" the other views down the screen?

Is there a way to make the "content" area of an iPhone app aware of a larger navigation bar?

Similar to these questions:

• iOS: Adding a fixed image just开发者_如何学Python below the navigation bar
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I've managed to use the 1st questions sample code to add a category on UINavigationBar and change its height, and added a subview where I need it, but I can't see a way to cause the UITableView (or indeed any content views) to take its height into consideration:

(The colors are only to make the different views distinguishable)

The accepted answer to the first question sets the nav bar's frame in -layoutSubviews, which is anywhere from "ewwwww" to outright wrong depending on the assumptions made by other layout code.

Instead, override -sizeThatFits: to return a more appropriate size.

I'd go about this by adjusting the tableView.frame, so something like this:

CGRect navFrame = self.navigationController.navigationBar.frame;

CGRect tableFrame = self.tableView.frame;

tableFrame.size.height = tableFrame.size.height - navFrame.size.height;
tableFrame.origin.y = navFrame.size.height; //move it down by the height covered by the navigation Bar

self.tableView.frame = tableFrame;

You could do this with your other views as well - i.e. by simply adjusting the frame.

I've not got XCode on this computer, so I've not checked the code - just written it out as an example, so please check it yourself before using it!