Detect when UITableViewCell goes out of scope

Question

How can I detect when a UITableViewCell derived object gets removed from a table and into the cache?

Answer 1

Implement either of the following methods. When removed from the table, superview will become nil. When added back to the table, superview will be set to the table view.

- (void)willMoveToSuperview:(UIView *)newSuperview;
- (void)didMoveToSuperview;

Also see

- (void)prepareForReuse;

Answer 2

after ios 6.0 you have the following method of UITableViewDelegate

- (void)tableView:(UITableView *)tableView didEndDisplayingCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath


Use this method to detect when a cell is removed from a table view, as opposed to monitoring the view itself to see when it appears or disappears.