ios - UITableView Detecting Last Cell

Question

How can I detect when a UITableView has been scrolled to the bottom so that the last cell is visible?

Answer 1

内部tableView:cellForRowAtIndexPath:またはtableView:willDisplayCell:forRowAtIndexPath:このように：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    ...

    NSInteger sectionsAmount = [tableView numberOfSections];
    NSInteger rowsAmount = [tableView numberOfRowsInSection:[indexPath section]];
    if ([indexPath section] == sectionsAmount - 1 && [indexPath row] == rowsAmount - 1) {
        // This is the last cell in the table
    }

    ...

}

Answer 2

メソッドを UITableViewDelegate に実装しtableView:willDisplayCell:forRowAtIndexPath:、最後の行かどうかを確認します。

Answer 3

私はこの解決策を見つけました：

func scrollViewDidScroll(_ scrollView: UIScrollView) {
      let contentOffsetMaxY: Float = Float(scrollView.contentOffset.y + scrollView.bounds.size.height)
      let contentHeight: Float = Float(scrollView.contentSize.height)
      let lastCellIsVisible = contentOffsetMaxY > contentHeight + somePaddingIfWanted
      if lastCellIsVisible {
           doSomething()
      }
}