TableViewCell ShowKeyBoard ScrollPosition

// ViewController

var focusCellIndex: NSIndexPath!

func keyboardDidShow(notification: NSNotification) {
    
    let rect = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
    UIView.animateWithDuration(0, animations: {
        self.mainTableView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.viewHeight - rect.height)
        }) { (boolValue) -> Void in
                
            let visibleRect = self.mainTableView.bounds
            let rectInTableView = self.mainTableView.rectForRowAtIndexPath(self.focusCellIndex)
            let result = CGRectContainsRect(visibleRect, rectInTableView);
                
            if !result {
                 self.mainTableView.scrollToRowAtIndexPath(self.focusCellIndex, atScrollPosition: .Bottom, animated: true)
            }
    }
}


func setText(index: NSIndexPath,cell: UITableViewCell) {
    focusCellIndex = index
}

// Cell 

func EditingDidBegin(textfield: CustomTextField) {
   parent.setText(textFieldCellItem.index, cell: self)
}