addTarget到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")  

它是一种刷新器，可以正常工作，但是我想添加一个动作，当我向下滚动到tableView的底部时将使其刷新，就像我对ValueChanged所做的一样，但对于底部

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结束时，它正在减速并且位于底部，那么您可以调用refresher 。