Ios swift – Items of on boarding screens are not appearing in Collection View Cells in XCode – Designed in Storyboard

I’m making an onboarding screen for a project in which I’ve used storyboard for design and collection view to scroll steps of on boarding screen. No error in the code run but collection views items are not appearing..

import UIKit

class OnBoardingViewController: UIViewController {

@IBOutlet weak var ImageCollectionView: UICollectionView!
@IBOutlet weak var skipButton: UIButton!
@IBOutlet weak var pageControl: UIPageControl!
@IBOutlet weak var nextButton: UIButton!

   
var slides: [OnBoardingSlide] = []

override func viewDidLoad() {
    super.viewDidLoad()
    
    
    
    slides = [
        OnBoardingSlide(title: "This is the Title", description: "This is the description", image: UIImage(named: "onBoarding1")!),
        OnBoardingSlide(title: "This is the Title", description: "This is the description", image: UIImage(named: "onBoarding2")!),
        OnBoardingSlide(title: "This is the Title", description: "This is the description", image: UIImage(named: "onBoarding1")!)
    ]
    
}


@IBAction func nextButtonPressed(_ sender: UIButton) {
}

@IBAction func skipButtonPressed(_ sender: UIButton) {
}

}

extension OnBoardingViewController: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return slides.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: OnBoardingCollectionViewCell.identifier, for: indexPath) as! OnBoardingCollectionViewCell
    cell.setup(slides[indexPath.row])
    return cell
}

}