问题:

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!

回答1:

You can simply implement the fetching operation inside -

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

and check for the condition

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

回答2:

you can also use the scrollview delegate since uicollectionview inherits from uiscrollview , just implement the uiscrollview delegate method :

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

and do something like :

- (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
   }
}