Simulated Infinite Scrolling

// The scrollView has come to a complete stop, do the following...
    func scrollViewDidEndDecelerating(feedScrollView: UIScrollView) {

        print("You reached the bottom")
        // If the scrollView offset + the scrollview height is greater than or equal to the height of the scrollView content, 
        // we have reached the bottom, so...
        if feedScrollView.contentOffset.y + feedScrollView.frame.size.height >= feedScrollView.contentSize.height {
            // Delay for 1 second then...
            delay(1, closure: { () -> () in
                // Create frame for new imageView, same as feed ImageView
                let newFrame = self.feedImageView.frame
                // Create new ImageView with newFrame
                let newImageView = UIImageView(frame: newFrame)
                // create new image, same as feed Image
                let newImage = UIImage(named: "home_feed")
                // Set new ImageView image to newImage
                newImageView.image = newImage
                // position the new imageView below the previous image view
                newImageView.frame.origin.y = self.feedImageView.frame.origin.y + self.numberOfImageViews * self.feedImageView.frame.size.height
                // Add imageView to scrollView
                feedScrollView.addSubview(newImageView)
                // Increase the feedScrollView contentsize with each additional imageView added using
                feedScrollView.contentSize = CGSize(width: self.feedImageView.frame.size.width,
                    height: self.feedImageView.frame.size.height + self.numberOfImageViews * newImageView.frame.size.height)
                // add 1 to scrollViewCount
                self.numberOfImageViews += 1
            })
        }
    }