ios - UICollectionView load more data

Question

I want to fetch more data from server if the last cell will display, but UICollectionView don't have method -willDisplayCell like UITableview. So I have no idea about this situation, can somebody tell me what should I do , thanks!

Answer 1

您可以简单地在内部实现获取操作 -

  (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath

并检查情况

 if(indexPath.row==your_array.count-1).

Answer 2

您也可以使用滚动视图委托，因为 uicollectionview 继承自 uiscrollview ，只需实现 uiscrollview 委托方法：

- (void)scrollViewDidScroll:(UIScrollView *)scrollView;

并执行以下操作：

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    if (scrollView.contentOffset.y == scrollView.contentSize.height - scrollView.frame.size.height)
    {
      //LOAD MORE
      // you can also add a isLoading bool value for better dealing :D
   }
}