Initializers of a Class Extending UICollectionView (Swift 3.2) - swift

Question

I am coding in Swift 3.2. I have a class called EventCollectionView that extends UICollectionView. An instance of this class is an 'event' and I would like to initialize it with three UIImages, images that display the event photo, event info, and event tickets.
However, when I try to call super.init() in the custom initializer I get an error message saying 'Must call a designated initializer of the superclass UICollectionView.' I have tried implementing super.init(frame:CGRect) but that doesn't seem to work either.
Below is the first part of my EventCollectionView class.
var eventPhoto: UIImage?
var eventInfo: UIImage?
var eventTickets: UIImage?
//Initializers
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
init?(eventPhoto: UIImage?, eventInfo: UIImage?, eventTickets: UIImage?) {
super.init() //Where the error occurs
self.eventPhoto = eventPhoto
self.eventInfo = eventInfo
self.eventTickets = eventTickets
Any insight would be greatly appreciated.

Answer 1

From the Apple developer documents, it looks like the appropriate init method signature should be: init(frame: CGRect, collectionViewLayout layout: UICollectionViewLayout). For example, your init method could become:
init?(eventPhoto: UIImage?, eventInfo: UIImage?, eventTickets: UIImage?) {
let flowLayout:UICollectionViewFlowLayout = UICollectionViewFlowLayout()
let collectionViewFrame:CGRect = CGRect(x: 0, y: 0, width: 200, height: 200)
super.init(frame: collectionViewFrame, collectionViewLayout: flowLayout)
...
}

Answer 2

So if you want to initialize such EventCollectionView by storyboard you should inject those parameters in another way like:
class EventCollectionView:UICollectionView {
var eventPhoto: UIImage?
var eventInfo: UIImage?
var eventTickets: UIImage?
func setup(eventPhoto: UIImage?, eventInfo: UIImage?, eventTickets: UIImage?) {
self.eventPhoto = eventPhoto
self.eventInfo = eventInfo
self.eventTickets = eventTickets
}
}
then you should call setup anytime after the initialization such as:
import UIKit
class YourViewController: UIViewController {
#IBOutlet var collectionView:EventCollectionView!
override func viewDidLoad() {
super.viewDidLoad()
// setup whatever here:
let photo:UIImage? = nil
let info:UIImage? = nil
let tickets:UIImage? = nil
collectionView.setup(eventPhoto: photo, eventInfo: info, eventTickets: tickets)
}
}