swift parse: view random image

I finally was able to pull an array of images from parse after fiddling with tutorials. from that array I want to throw it on an imageview via next random image with a swipe gesture

        var query = PFQuery(className:"cats")
    //query.whereKey("username", equalTo:followedUser)
    query.findObjectsInBackgroundWithBlock {(objects: [AnyObject]?, error: NSError?) -> Void in
        if error == nil {
            // The find succeeded.
            //println("Successfully retrieved \(objects!.count) scores.")
            // Do something with the found objects



            for object in objects! {

                // Update - replaced as with as!

                //self.titles.append(object["Title"] as! String)


                // Update - replaced as with as!

                self.imageFiles.append(object as! PFObject)

                println(self.imageFiles)

                self.view.addGestureRecognizer(rightSwipe)



                //self.tableView.reloadData()

            }
        } else {
            // Log details of the failure
            println(error)
        }
    }

the print line(self.imageFiles) actually shows the array of files which is great, what I'm having issues with is using the random generator. Still new to syntax, I was trying to do like imageview.image = imageFiles[0] or something like that to just display one of the images in the array. not really sure the syntax though. and I'm guessing once i get that it would be imageview.image = imageFiles[RandomNumber] or the equivalent.

for the swipe part I think I got that under control

thanks guys.

PS Most of my posts end up being super confusing so please ask and I will clear it up.