My super simple UICollectionView is not loading - ios

Question

I'm trying to create a simple collection view. I've got my custom cell "SectionCell" and the my custom class "Section", which contains two #IBOutlet properties: titleLabel and imageView. Both of these properties are hooked up to their respective storyboard views.
In storyboard, the collectionView scene has been linked to the MenuVC.swift file, which inherits from UICollectionView. The Cell view is linked to SectionCell. And I've set the cell's Identifier to "Section".
For debugging purposes I've set the view.backgroundColor to black and the cell's contentView background color to teal. Yet when I run the the simulator neither show. I get a white background and all that appears is the view title. Any ideas on what the fix is?
class MenuVC: UICollectionViewController {
var sections = [Section]()
override func viewDidLoad() {
super.viewDidLoad()
title = "Begin Learning"
view.backgroundColor = .black
}
// MARK:- CollectionView Methods
override func numberOfSections(in collectionView: UICollectionView) -> Int {
return 3
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Section", for: indexPath) as? SectionCell else {
fatalError("Unable to dequeue SectionCell ")
}
let section = sections[indexPath.item]
cell.titleLabel.text = section.title
cell.imageView.image = UIImage(named: section.image)
return cell
}
}
class SectionCell: UICollectionViewCell {
#IBOutlet var imageView: UIImageView!
#IBOutlet var titleLabel: UILabel!
}
class Section: NSObject {
var title: String
var image: String
init(title: String, image: String) {
self.title = title
self.image = image
}
}
Simulator
I'm also quite new to posting questions on SO. If you have any tips on how to better format questions, I'm all ears!

Answer 1

make outlet of your collectionview and give it to the delegate and data source...
make outlet like this in your view controller:
#IBOutlet weak var collectionView: UICollectionview!
then put this code in viewDidLoad()
override func viewDidLoad() {
super.viewDidLoad()
collectionView.delegate = self
collectionView.dataSource = self
collectionView.relaodData()
}

Answer 2

have you implemented the following protocol?
UICollectionViewDelegateFlowLayout
extension MenuVC: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return .init(width: 300.0, height: 300.0) // and set size for each item inside this function.
}
}

Answer 3

SOLVED
LOL you really do need eagle eyes as a developer. This:
override func numberOfSections(in collectionView: UICollectionView) -> Int {
return 3
}
is supposed to be:
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 3
}
And voila!