addTarget to UIRefreshControl()

Question

I have made a UIRefreshControl:

refresher = UIRefreshControl()
refresher.attributedTitle = NSAttributedString(string: "refresh")
refresher.addTarget(self, action: "refreshed", forControlEvents: UIControlEvents.ValueChanged)
refresher.addTarget(self, action: "refreshed", forControlEvents: UIControlEvents.ApplicationReserved)
refresher.addTarget(self, action: "refreshed", forControlEvents: UIControlEvents."scrolled down to bottom")  

It is a refresher and works fine, but I want to add an action which will make it refresh when I scroll down to the bottom of my tableView, something like I have done with ValueChanged, but for the bottom

Answer 1

You can use the built in scrollViewDidEndDecelerating

func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
    let bottomEdge = scrollView.contentOffset.y + scrollView.frame.size.height
    if bottomEdge >= scrollView.contentSize.height {
        // Reached bottom, do your refresh
        print("Bottom")
    }
}

When the scrollView has ended it´s decelerating and you´re at the bottom, then you can call your refresher.