Button Segue in custom UITableViewCell - ios

Question

I have a custom UITableViewCell with a button inside to segue the data to another viewController. This is by utilizing the
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//cell setup code
cell.button.tag = indexPath.row
cell.button.addTarget(self, action: "editRow", forControlEvents: .TouchUpInside)
return cell
}
then using the function
func editRow() {
self.performSegueWithIdentifier("editRow", sender: self)
}
the editRow segue is a storyboard segue.
The issue...Instead of performing the segue and passing the data, it fires the segue twice and doesn't transfer any data to the "SLEdit" viewController. Any ideas as to why this is happening? Please keep in mind I'm not very familiar with objective-c due to beginning learning with swift. If you need any further information or more code let me know. Thanks!
EDIT:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
if segue.identifier == "editRow" {
let cell = sender as! SLTableViewCell
let indexPath = tableView.indexPathForCell(cell)
let SListController:SLEdit = segue.destinationViewController as! SLEdit
let items:SList = frc.objectAtIndexPath(indexPath!) as! SList
SListController.item = items
}
}

Answer 1

This is because you have already made a segue action in storyboard editor and you are calling the same segue again by assigning custom action to the button.
And to pass data to the next view controller use this method:
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!){
if segue.identifier == "segueIdentifier" {
}
}
Edit 1:
The error: "Could not cast value of type UIButton" is due to this line:
let cell = sender as! SLTableViewCell
Here the sender UIButton and you are convertring/assigning(whichever term is suitable) to the TableViewCell.
Edit 3:
Replace your code by this:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!{
if segue.identifier == "editRow" {
let button = sender as! UIButton
let view = button.superview!
let cell = view.superview as! <Your custom cell name here>
let indexPath = itemTable.indexPathForCell(cell)
let SListController:SLEdit = segue.destinationViewController as! SLEdit
let items:SList = frc.objectAtIndexPath(indexPath) as! SList
SListController.item = items
}
}