Adding items to tableview with sections - ios

Question

I display a shopping list for different product groups as a table view with multiple sections. I want to add items with an add button for each group. So I equipped the header cell with a UIToolbar and a + symbol as a UIBarButtonItem.
Now every product group has an add button of his own:
If one add button was pressed, I have a problem identifying which one was pressed.
If I connect the add button with a seque, the function prepareForSeque(...) delivers a sender of type UIBarButtomItem, but there is no connection to the header cell from were the event was triggered.
If I connect an IBAction to the UITableViewController, the received sender is also of type UIBarButtomItem, and there is no connection to the header cell, too.
If I connect an IBAction to my CustomHeaderCell:UITableViewCell class, I am able to identify the right header cell.
This line of code returns the header cell title:
if let produktTyp = (sender.target! as! CustomHeaderCell).headerLabel.text
However, now the CustomHeaderCell class has the information I need.
But this information should be available in the UITableViewController.
I couldn't find a way to feed the information back to the UITableViewController.
import UIKit
class CustomHeaderCell: UITableViewCell {
#IBOutlet var headerLabel: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
#IBAction func neuesProdukt(sender: UIBarButtonItem) {
if let produktTyp = (sender.target! as! CustomHeaderCell).headerLabel.text
{
print(produktTyp)
}
}
}

Answer 1

Here's how I typically handle this:
Use a Closure to capture the action of the item being pressed
class CustomHeaderCell: UITableViewCell {
#IBOutlet var headerLabel: UILabel!
var delegate: (() -> Void)?
#IBAction func buttonPressed(sender: AnyObject) {
delegate?()
}
}
When the Cell is created, create a closure that captures either the Index Path or the appropriate Section.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let section = indexPath.section
let cell = createCell(indexPath)
cell.delegate = { [weak self] section in
self?.presentAlertView(forSection: section)
}
}