ios - 将目标添加到 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")  

这是一个复习，工作正常，但我想添加一个 Action ，当我向下滚动到我的 tableView 底部时，它会刷新，就像我对 所做的一样ValueChanged，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您位于底部，然后您可以调用您的刷新器。