在UITableViewCell和UIViewController之间进行通信的最佳方式

我这样做是通过为每个UITableViewCell设置一个实例化的UIViewController引用,然后在UITableViewCell状态更改时调用一个函数CancelDelete().

代码似乎效率低下,因为对于每个MyCell,我首先将占位符MyViewContoller实例化为公共变量,然后在UITableView初始化时将其替换为引用UIViewController.

有一个更好的方法吗？

class MyCell : UITableViewCell
{
    var previousState : UITableViewCellStateMask = UITableViewCellStateMask.allZeros

    // This holds a reference to the parent view controller
    // Seems wasteful to instantiate since it gets replaced
    var controller:MyViewController = MyViewController()

    // This is called when the user aborts edit mode
    override func willTransitionToState(state: UITableViewCellStateMask) {

        if state & UITableViewCellStateMask.ShowingEditControlMask != nil {
            if previousState & UITableViewCellStateMask.ShowingDeleteConfirmationMask != nil { 

            // send notification to controller 
            controller.CancelDelete(self)
        }
    }

    previousState = state
    }    
}


class MyViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {

    func tableView(tableView: UITableView,cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        // Give cell access to this controller                        
        var cell:MyCell = tableView.dequeueReusableCellWithIdentifier("cell") as MyCell
        cell.controller = self
        cell.tag = indexPath.row
    }

    // This is called from the table cell
    func CancelDelete(cell:MyCell) {
            editButtons[cell.tag].hidden = false
    }

}