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iphone - Adding button to left of UISearchBar

I am tearing my hair out on this one. My client wants to add a button to the left of a search bar like the example below:

alt text
(source: erik.co.uk)

But I just can't figure out how to do it. Apple don't seem to provide any documented method for adding custom buttons to a UISearchBar, let alone to the left of the search bar.

I've tried hacking around in Interface Builder adding a UIToolbar with a button in it to the left but I cannot find any combination of styles where the two line up properly to give the impression that they are one. There is always what looks like one pixel difference in the vertical alignment as you can see from the picture below:

alt text
(source: erik.co.uk)

I've searched around and just can't find the answer, but as we can see from the screenshot it must be possible!

Thank you in advance for your help.

Erik

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Use a navigation bar instead of a toolbar. Set the search bar to the navigation bar's title view.

In Interface Builder:

screenshot 1

Result:

screenshot 2


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