I want to send data when I tap a button in tableView Cell

Question

I am implementing a commentView for my app. I have a main view which is tableview contains picture and a button to go comment view. I want that when user tap comment button in table view, view shows comment view and pass PFObject by prepareforSegue method.

now comment button works, but I have an error from prepareforsegue here is my code.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

if (segue.identifier == "mainToComment") {


let destViewController : CommentVC = segue.destinationViewController as! CommentVC
destViewController.parentObjectID = parentObjectID
let selectedRowIndex = self.tableView.indexPathForSelectedRow

destViewController.object = (postsArray[(selectedRowIndex?.row)!] as? PFObject)

and here is my how my button works.

 @IBAction func commentButtonTapped(sender: AnyObject) {

    let button = sender as! UIButton
    let view = button.superview!
    let cell = view.superview as! MainTVCE
    let indexPath = tableView.indexPathForCell(cell)
    parentObjectID = postsArray[(indexPath?.row)!].objectId!!

when I debug, selectedRowIndex has no value(nil) I think it cause of I tap button instead of cell.

How can I set indexPath for this? or How can I make it work?

Answer 1

I don't know name of your main TableViewCell view controller. Assume that, I name this view controller is MainTableViewCell.

I create a closure in MainTableViewCell:

var didRequestToShowComment:((cell:UITableViewCell) -> ())?

When button comment is tapped:

@IBAction func commentButtonTapped(sender: AnyObject) {
    self.didRequestToShowComment?(self) // self is this UITableViewCell
}

In table cellForRowAtIndex... of your main view controller.

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

    ...
    mainTableViewCell.didRequestToShowComment = { (cell) in
        let indexPath = tableView.indexPathForCell(cell)
        let objectToSend = postsArray[indexPath.row] as? PFObject
        // Show your Comment view controller here, and set object to send here
    }
    ...


    return cell
}