Press UIBarButtonItem programmatically in swift?

Question

I have a bar button item that I want to press programmatically, basically the equivalent of

buttonObj.sendActionsForControlEvents(UIControlEvents.TouchUpInside)

but as a bar button item

edit: I forgot to mention, I can't simply call the action method for the button since I'm using the SWRevealViewController library and using their "revealToggle:" action on the bar button item, which I'm not sure how to call on its own.