IOS view container: how to set the delegate

Question

All, my question is a follow up to this one: SWIFT - Hide a view container with a button in the ViewContainer

In short, I have a UIViewController (Main) that contains a button "SHOW" and a containerView. The container view ("containerView") has a single button "HIDE". Initially the containerView is hidden, and when the "SHOW" button is tapped, it is displayed. All is well. I want to use a delegate such that when the "HIDE" button is tapped, the containerView will be hidden.

I understand all the delegate stuff, EXCEPT how does the containerView become a viewController so that I can assign Main to be the delegate?

The container view is a UIView which (somehow) points to / contains a view controller, but I cannot determine how to reference it.

import UIKit

class MainViewController: UIViewController,dismissPickerViewDelegate {

    @IBOutlet weak var pickerContainerView: containerView!
    @IBOutlet weak var showButton: UIButton!
    override func viewDidLoad() {
        super.viewDidLoad()
        pickerContainerView.hidden = true
    }

    @IBAction func showButtonTapped(sender: AnyObject) {
        println("+Show")
        pickerContainerView.hidden = false
        println("-Show")
    }

    func dismissPicker()
    {
        println("+dismissPicker")
        println("-dismissPicker")
    }
}


// ========================

import UIKit

protocol dismissPickerViewDelegate {
    func dismissPicker()
}

class pickerViewController: UIViewController {

    var delegate : dismissPickerViewDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    @IBOutlet weak var hideButton: UIButton!
    @IBAction func hideButtonTapped(sender: AnyObject) {
        println("+hideButtonTapped")
        delegate?.dismissPicker()
        println("-hideButtonTapped")
    }
}

output: +Show -Show +hideButtonTapped -hideButtonTapped

TIA, :bp:

Answer 1

It doesn't need to be a view controller in order to allow assignment of a delegate. The delegate is just a property of an object. Simply do this in your view controller:

override func viewDidLoad() {
    super.viewDidLoad()
    pickerContainerView.delegate = self
    pickerContainerView.hidden = true
}

Answer 2

If your ViewController have Any ContainerView, then ViewController call prepareForSegue after awakeFromNib

this called before viewDidLoad

so you can set delegate in

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

First

Set your EmbededSegue Identifier

Second set your delegate to embededVC in prepareForSegue Function

Finally in your EmbededViewController call hide function to MainViewController