Question

I need release some resources when UITableViewCell became out of visible rect. prepareForReuse message is sent when UITableViewCell needs to be reused, but I need another… I have UITableViewCell subclass, and can override some messages…

This is exactly what I need: tableView:didEndDisplayingCell:forRowAtIndexPath:

But this is iOS6+ only solution. I need iOS4.3+ solution.

Answer 1

When cell becomes hidden it is removed from the UITableView. So you can override in your UITableViewCell derived class method willMoveToSuperview:

- (void)willMoveToSuperview:(UIView *)newSuperview
{
    [super willMoveToSuperview:newSuperview];
    NSLog(@"%p willMoveToSuperview: %p", self, newSuperview);
    if(newSuperview == nil) {
        // release some resources here
    }
}