Presenting a UIPopover from a DisclosureButton in a UITableViewCell

I'm trying to do something pretty simple, but I can't figure out how to anchor the popover to the DisclosureButton on a UITableViewCell. Can anyone help me with a simple example of how to use presentPopoverFromRect that will properly anchor to the accessoryView?

开发者_如何学CThanks!

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Have you tried using UIView's - (CGRect)convertRect:(CGRect)rect toView:(UIView *)view to convert the accessoryView's rect?