addTarget to UIRefreshControl()

Question

我做了一个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")  

它是一个刷新器，工作正常，但是我想添加一个操作，当我向下滚动到我的tableView底部时，它会刷新，就像我对ValueChanged做的那样，但是对于底部

Answer 1

您可以使用内置的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")
    }
}

当scrollView已经结束，它是减速，你在底部，然后你可以调用你的refresher。