Display spinning activity indicator in a table-view cell

showActivityIndicator_forTableViewCell.m

- (void)showActivityIndicator:(BOOL)show forTableViewCell:(UITableViewCell *)cell
   if (show) {
        cell.accessoryType = UITableViewCellAccessoryNone;
        
        UIActivityIndicatorView *activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
        [activityIndicatorView startAnimating];
        cell.accessoryView = activityIndicatorView;
        [activityIndicatorView release];
    }
    else {
        cell.accessoryView = nil;
    }
}