Issue with UISearchBar frame

I have a UITableView which I programatically create and I have added a UISearchBar/UISearchDisplayController as a subview. It looks like this:

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That's all fine but when I touch it to invoke searching the frames changes strangely, any idea why?

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I've tried manually setting the frame, doesn't seem to help.

The UITableView is a property of a UIViewController.

Solution

I think it is a duplicate of this question UIsearchBar. Can't change frame.

The answer being that you can't mess with UISearchBar's frame.