ios - 如何将刷新控件添加到 View Controller 中的水平 collectionview？

Question

我目前有:

        refresher = UIRefreshControl()
    refresher.attributedTitle = NSAttributedString(string: "Pull to refresh")
    refresher.addTarget(self, action: "refresh:", forControlEvents: UIControlEvents.ValueChanged)
    self.postsView.addSubview(refresher)

在包含 Collection View 的 View Controller 的 viewdidload() 中。与 collectionview 交互并让自定义单元格正常显示。但是，当我添加这个刷新器时，它没有做任何事情。我不确定为什么，我在这里错过了一步吗？谢谢!

Answer 1

实现 UIScrollview 委托(delegate)，请尝试下面的代码

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
     CGPoint offset = scrollView.contentOffset;
     CGRect bounds = scrollView.bounds;
     CGSize size = scrollView.contentSize;
     UIEdgeInsets inset = scrollView.contentInset;
     float y = offset.x + bounds.size.width - inset.right;
     float h = size.width;


     float reload_distance = 75; //distance for which you want to load more
     if(y > h + reload_distance) {
        // write your code getting the more data
        NSLog(@"load more rows");

     }
 }